Relevant bibliographies by topics / Optical squeezing

Academic literature on the topic 'Optical squeezing'

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Published: 4 June 2021
Last updated: 28 January 2023

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Journal articles on the topic "Optical squeezing"

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Wu, Zhenhua, Zhen Yi, Wenju Gu, Lihui Sun, and Zbigniew Ficek. "Enhancement of Optomechanical Squeezing of Light Using the Optical Coherent Feedback." Entropy 24, no. 12 (November 29, 2022): 1741. http://dx.doi.org/10.3390/e24121741.

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A coherent feedback scheme is used to enhance the degree of squeezing of the output field in a cavity optomechanical system. In the feedback loop, a beam splitter (BS) plays the roles of both a feedback controller and an input–output port. To realize effective enhancement, the output quadrature should take the same form as the input quadrature, and the system should operate at the deamplification situation in the meantime. This can be realized by choosing an appropriate frequency-dependent phase angle for the generalized quadrature. Additionally, both the transmissivity of the BS and the phase factor induced by time delays in the loop affect optical squeezing. For the fixed frequency, the optimal values of transmissivity and phase factor can be used to achieve the enhanced optical squeezing. The effect of optical losses on squeezing is also discussed. Optical squeezing is degraded by the introduced vacuum noise owing to the inefficient transmission in the loop. We show that the enhancement of squeezing is achievable with the parameters of the current experiments.
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Reid, M. D., and D. F. Walls. "Squeezing via optical bistability." Physical Review A 32, no. 1 (July 1, 1985): 396–401. http://dx.doi.org/10.1103/physreva.32.396.

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Han, Ya-Shuai, Xiao Zhang, Zhao Zhang, Jun Qu, and Jun-Min Wang. "Analysis of squeezed light source in band of alkali atom transitions based on cascaded optical parametric amplifiers." Acta Physica Sinica 71, no. 7 (2022): 074202. http://dx.doi.org/10.7498/aps.71.20212131.

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The squeezed light field in the band of alkali metal atomic transitions is an important quantum resource in the field of quantum information and precision measurement. The wavelengths of atomic transition lines (760–860 nm) are relatively short. Limited by the gray-tracking effect of nonlinear crystals, the squeezing degree of the squeezed light in this band generated by the optical parametric amplifiers is low. Now, the squeezing is about 3–5 dB. Considering the problems in the experimental generation of the squeezed light at the wavelengths of atomic transitions, the variation law of quantum noise of the light field output from the single optical parametric amplifier with its physical parameters is studied theoretically, and the optimal physical parameters are obtained. To further improve the squeezing in the band of alkali metal atomic transitions, the cascaded optical parametric amplifiers are considered. Based on the basic theory of the optical parametric amplifiers, the theoretical model of the cascaded optical parametric amplifiers is constructed, in which the optical loss and phase noise of the cascaded optical loops are considered. Based on this, the quantum noise characteristics of the light field output from the cascaded system versus the optical loss and phase noise are analyzed at the frequencies of 2 MHz and 100 kHz, respectively. It is found that for the squeezing at 2 MHz, cascading 2 to 3 optical parametric amplifiers can significantly improve the squeezing under the premise of the low optical path loss and phase noise; for the squeezing in the low-frequency band, the enhancement of the squeezing for the cascaded system is quite weak. Under the current experimental parameters, the squeezing at 2 MHz of the squeezed light on rubidium resonance can be improved from –5 dB to –7 dB by cascading another DOPA. For the squeezing at low frequency band, the cascaded system proves to be useless, and the efforts should be made to reduce the technique noise in the low frequency band. Furthermore, the quantum limit and spectral characteristics of the squeezed light field output from the cascaded system are further explored. This study can provide reference and guidance for the improvement in the squeezing degree of the band of atomic transitions.
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TINH, VO, and NGUYEN BA AN. "BIEXCITON kth POWER AMPLITUDE SQUEEZING DUE TO OPTICAL EXCITON–BIEXCITON CONVERSION." International Journal of Modern Physics B 14, no. 08 (March 30, 2000): 877–88. http://dx.doi.org/10.1142/s0217979200000716.

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We extend a previous paper on biexciton normal squeezing to the case of k th power amplitude squeezing in a quantum interacting system of photons, excitons and biexcitons. We find that the k th power amplitude squeezing depends on the characteristics of the initial coherent biexciton while the normal squeezing does not. Both the direction of maximal squeezing and the squeezing degree are derived as explicit functions of k. Especially, the squeezing degree always decreases with increasing k regardless of the initial conditions. All these properties are examined numerically.
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Sorokin, Arseny A., Elena A. Anashkina, Joel F. Corney, Vjaceslavs Bobrovs, Gerd Leuchs, and Alexey V. Andrianov. "Numerical Simulations on Polarization Quantum Noise Squeezing for Ultrashort Solitons in Optical Fiber with Enlarged Mode Field Area." Photonics 8, no. 6 (June 18, 2021): 226. http://dx.doi.org/10.3390/photonics8060226.

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Broadband quantum noise suppression of light is required for many applications, including detection of gravitational waves, quantum sensing, and quantum communication. Here, using numerical simulations, we investigate the possibility of polarization squeezing of ultrashort soliton pulses in an optical fiber with an enlarged mode field area, such as large-mode area or multicore fibers (to scale up the pulse energy). Our model includes the second-order dispersion, Kerr and Raman effects, quantum noise, and optical losses. In simulations, we switch on and switch off Raman effects and losses to find their contribution to squeezing of optical pulses with different durations (0.1–1 ps). For longer solitons, the peak power is lower and a longer fiber is required to attain the same squeezing as for shorter solitons, when Raman effects and losses are neglected. In the full model, we demonstrate optimal pulse duration (~0.4 ps) since losses limit squeezing of longer pulses and Raman effects limit squeezing of shorter pulses.
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Li, Guoyao, and Zhang-Qi Yin. "Squeezing Light via Levitated Cavity Optomechanics." Photonics 9, no. 2 (January 22, 2022): 57. http://dx.doi.org/10.3390/photonics9020057.

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Squeezing light is a critical resource in both fundamental physics and precision measurement. Squeezing light has been generated through optical-parametric amplification inside an optical resonator. However, preparing the squeezing light in an optomechanical system is still a challenge for the thermal noise inevitably coupled to the system. We consider an optically levitated nano-particle in a bichromatic cavity, in which two cavity modes could be excited by the scattering photons of the dual tweezers, respectively. Based on the coherent scattering mechanism, the ultra-strong coupling between the cavity field and the torsional motion of nano-particle could be achieved for the current experimental conditions. With the back-action of the optically levitated nano-particle, the broad single-mode squeezing light can be realized in the bad cavity regime. Even at room temperature, the single-mode light can be squeezed for more than 17 dB, which is far beyond the 3 dB limit. The two-mode squeezing light can also be generated, if the optical tweezers contain two frequencies, one is on the red sideband of the cavity mode, the other is on the blue sideband. The two-mode squeezing can be maximized near the boundary of the system stable regime and is sensitive to both the cavity decay rate and the power of the optical tweezers.
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Ono, Takafumi, Javier Sabines-Chesterking, Hugo Cable, Jeremy L. O’Brien, and Jonathan C. F. Matthews. "Optical implementation of spin squeezing." New Journal of Physics 19, no. 5 (May 16, 2017): 053005. http://dx.doi.org/10.1088/1367-2630/aa6e39.

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REYNAUD, S., and E. GIACOBINO. "SQUEEZING IN BISTABLE OPTICAL SYSTEMS." Le Journal de Physique Colloques 49, no. C2 (June 1988): C2–477—C2–482. http://dx.doi.org/10.1051/jphyscol:19882112.

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GIRI, DILIP KUMAR, and P. S. GUPTA. "nTH-ORDER AMPLITUDE SQUEEZING EFFECTS OF RADIATION IN MULTIPHOTON PROCESSES." International Journal of Modern Physics B 20, no. 16 (June 30, 2006): 2265–81. http://dx.doi.org/10.1142/s0217979206034686.

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Squeezing of the electromagnetic field is a purely quantum mechanical phenomenon and this quantum effect is expected to manifest itself in optical processes in which the nonlinear response of the system to the radiation field plays an important role. It has generated a great deal of interest in view of the possibility of reducing the noise of an optical signal below the vacuum limit i.e. zero-point oscillations. In this paper the concept of nth-order amplitude squeezing is introduced in the fundamental mode in four- and six-wave mixing processes as a generalization of the higher-order squeezing under short-time approximation based on a fully quantum mechanical approach. It established the coupled Heisenberg equations of motion involving real and imaginary parts of the quadrature operators. The condition for occurrence of nth-order squeezing is obtained from which higher-order squeezing upto n=3 are studied. Dependence of squeezing on photon number is also established. The conditions for obtaining maximum and minimum squeezing are obtained. The method of present investigation can be applied to any higher-order non-linear optical processes and the technique can also be extended for studying squeezing in any N-photon process in general. Further, nth-order squeezing of radiation in N-photon process can also be investigated. The results obtained may help in selecting a suitable process to generate optimum squeezing in the radiation field.
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Bergman, K., and H. A. Haus. "Squeezing in fibers with optical pulses." Optics Letters 16, no. 9 (May 1, 1991): 663. http://dx.doi.org/10.1364/ol.16.000663.

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Dissertations / Theses on the topic "Optical squeezing"

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Boivin, Luc. "Squeezing in optical fibers." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38373.

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Yu, Charles Xiao 1973. "Soliton squeezing in optical fibers." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86587.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2001.
Includes bibliographical references (p. 113-122).
by Charles Xiao Yu.
Ph.D.
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Schwab, Adele Ann. "Spin-squeezing of ⁸⁷Rb via optical measurement." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45338.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2008.
Includes bibliographical references (p. 55-57).
This project aims to reduce measurement uncertainty in atomic clocks by squeezing the collective spin of atoms. Spin-squeezing reduces noise below the standard quantum limit where precision scales as 1/ [square root of] N, allowing us to instead approach the Heisenberg limit where it scales as 1/N. We report spin-squeezing of the (F = 2, mR = 0) --> (F = 1, mF = 0) hyperfine transition of the 5S1/2 level of ⁸⁷Rb. We also demonstrate a viable setup for the spin-squeezing of the magnetically trappable (F = 2, mF = 1) --> (F = 1, mF = -1) transition, which could potentially be used as a compact frequency standard. This thesis provides a brief theoretical background of spin-squeezing and a summary of the project in its current state.
by Adele Ann Schwab.
S.B.
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Leroux, Ian Daniel. "Squeezing collective atomic spins with an optical resonator." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68696.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2011.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student submitted PDF version of thesis.
Includes bibliographical references (p. 128-133).
This thesis describes two methods of overcoming the standard quantum limit of signal-to-noise ratio in atomic precision measurements. In both methods, the interaction between an ultracold atomic ensemble and an optical resonator serves to entangle the atoms and deform the uncertainty distribution of the collective hyperfine spin so that it is narrower in some coordinate than would be possible if the atoms were uncorrelated. The first method uses the dispersive shift of the optical resonator's frequency by the atomic index of refraction to perform a quantum non-demolition measurement of the collective spin, projecting it into a squeezed state conditioned on the measurement outcome. The second method exploits the collective coupling of the atoms to the light field in the resonator to generate an effective interaction that entangles the atoms deterministically. Both methods are demonstrated experimentally, achieving metrologically relevant squeezing of 1.5(5) dB and 4.6(6) dB respectively, and simple analytical models, including the effects of scattering into free space, show that much greater squeezing is realistically achievable. To demonstrate the potential usefulness of such squeezing, a proof-of-principle atomic clock whose Allan variance decreases 2.8(3) three times faster than the standard quantum limit is also presented, together with a discussion of the conditions under which squeezing improves its performance.
by Ian Daniel Leroux.
Ph.D.
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Ju, Heongkyu. "Photon-number squeezing of femtosecond optical pulses in nonlinear media." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249632.

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Nguyen, Catherine. "Development of squeezing techniques for quantum noise reduction in gravitational-wave detectors." Thesis, Université Paris Cité, 2021. http://www.theses.fr/2021UNIP7129.

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Le bruit quantique est une des limitations principales des détecteurs interférométriques d'ondes gravitationnelles, comme Virgo et LIGO. Réduire le bruit quantique a un impact direct sur la portée scientifique des futurs détecteurs d'ondes gravitationnelles (Advanced Virgo +, Advanced LIGO+, Einstein Telescope, Cosmic Explorer). L'origine du bruit quantique réside dans la nature quantique de la lumière, et en particulier dans les fluctuations du vide qui entrent par la sortie de l'interféromètre. Actuellement, l'injection d'états de vide comprimé (squeezing indépendant de la fréquence) dans Virgo et LIGO permet de réduire le bruit quantique dans la bande spectrale de détection correspondante à une des deux composantes de ce bruit, le bruit de photons, ou shot noise, pour des fréquences supérieures à environ 100 Hz. La pression de radiation, l'autre composante, se manifeste quant à elle à de plus basses fréquences. Le shot noise émane de l'incertitude sur la phase tandis que la pression de radiation, de l'incertitude sur l'amplitude. Le principe d'incertitude d'Heisenberg impose que la réduction du shot noise grâce à l'injection d'états du vide comprimé sur la phase, se traduise nécessairement par une augmentation de la pression de radiation. Cet état comprimé peut être représenté par une ellipse, illustrant l'état comprimé du vide dans l'espace phase-amplitude, où les incertitudes sur la phase et l'amplitude sont inégales. Cependant, cet effet a commencé à dégrader la sensibilité des interféromètres Virgo et LIGO, durant la prise de données appelée O3. Afin de réduire le bruit quantique sur toute la bande spectrale de détection (et donc aussi à basse fréquence), il est nécessaire d'introduire dans l'interféromètre un squeezing dépendant de la fréquence, c'est-à-dire un état du vide comprimé, tantôt sur l'amplitude et tantôt sur la phase, permettant de réduire à la fois la pression de radiation et le shot noise. Pour Advanced Virgo+ et Advanced LIGO+ (les projets d'améliorations en cours, pour les détecteurs actuels, appelés Advanced Virgo et Advanced LIGO), l'ajout d'une cavité de filtrage quantique suspendue de 300 mètres et avec une très grande finesse, permettra de réaliser ce squeezing dépendant de la fréquence. Ma thèse porte sur le développement de techniques de squeezing pour la réduction du bruit quantique dans les futurs détecteurs d'ondes gravitationnelles. J'ai d'abord contribué à un travail expérimental sur l'automatisation et l'amélioration d'une source de squeezing indépendant de la fréquence et situé sur le site de Virgo, à Pise. Ce travail préparatoire a été réalisé pour la conception d'un banc de démonstration pour l'étude d'une technique de squeezing dépendant de la fréquence, alternative à celle proposée ci-dessus et basée sur l'intrication quantique (de type Einstein-Podolsky-Rosen). Les fondements théoriques de ce squeezing EPR ayant été proposés en 2017, cette technique présente des avantages pour les futurs détecteurs d'ondes gravitationnelles, notamment liés à l'absence de cavité de filtrage. Dans ce cadre, j'ai participé au design optique complet de cette expérience, qui pourra être implémentée sur le détecteur Virgo. J'ai conçu, réalisé et testé dans le laboratoire optique de l'APC, une cavité Fabry-Perot monolithique (de type étalon) nécessaire pour la séparation et la détection de deux faisceaux intriqués. Plus précisément, j'ai effectué des mesures de caractérisation optique et sur la stabilisation thermique de cette cavité, permettant de conclure sur les performances de cet étalon
Quantum noise is one of the main limitations for interferometric gravitational-wave (GW) detectors as Virgo and LIGO. Reducing quantum noise has a direct impact on the science reach of future GW detectors (Advanced Virgo +, Advanced LIGO+, Einstein Telescope, Cosmic Explorer). Quantum noise originates from the quantum nature of light, especially from the vacuum fluctuations entering by the interferometer detection stage. The current injection of vacuum squeezed states (frequency-independent squeezing) into Virgo and LIGO leads to the quantum noise reduction in the spectral detection region corresponding to one of the two components of quantum noise. This so-called quantum shot noise is present at frequencies higher than 100 Hz. The other quantum noise component, the so-called quantum radiation pressure noise, manifests itself at lower frequencies. Shot noise arises from the uncertainty on the phase, while the latter arises from the uncertainty on the amplitude. Heisenberg's uncertainty principles induce that the shot noise reduction, thanks to the injection of vacuum squeezed states, results in a radiation pressure noise increase. This squeezed state of light can be depicted with an ellipse, representing the squeezed states in a phase-amplitude space, with inequal uncertainties for the phase and the amplitude. Nonetheless, during the data-taking period called O3, this subsequent noise increase started to degrade the Virgo and LIGO interferometers' sensitivities. To achieve a broadband reduction of quantum noise, it is necessary to inject a frequency-dependent squeezing inside the interferometer, i.e., injecting vacuum squeezed states in a frequency-dependent way, which will have a smaller uncertainty accordingly to the concerned quantum noise component. For the next upgrade of the current detectors Advanced Virgo and Advanced LIGO, called Advanced Virgo+ and Advanced LIGO+, frequency-dependent squeezing is obtained by adding a suspended 300-meter filter cavity, with very high finesse. My thesis engages in the development of squeezing techniques for quantum noise reduction in future GW detectors. First, I contributed to an experimental work based on the automation and the improvement of a frequency-independent squeezed vacuum source located on the Virgo site, at Pisa. This was a preparatory work for the conception of a table-top experiment to study a frequency-dependent squeezing technique, alternative compared to the one proposed previously and based on Einstein-Podolsky-Rosen entanglement. The theory being brought forward in 2017, this technique offers significant advantages for future GW detectors, due to the absence of an external cost-intensive filter cavity. In this framework, I participated to the realization of a complete optical design for this experimental demonstrator, that can be implemented into the detector Virgo. I designed, realized, and tested a monolithic Fabry-Perot cavity (a solid etalon), at the optical laboratory of APC, necessary for the separation and detection of two entangled beams. More precisely, this cavity was optically characterized and its thermal stabilization was evaluated, which allowed to check its performances
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Bookjans, Eva M. "Relative number squeezing in a Spin-1 Bose-Einstein condensate." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37148.

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The quantum properties of matter waves, in particular quantum correlations and entanglement are an important frontier in atom optics with applications in quantum metrology and quantum information. In this thesis, we report the first observation of sub-Poissonian fluctuations in the magnetization of a spinor 87Rb condensate. The fluctuations in the magnetization are reduced up to 10 dB below the classical shot noise limit. This relative number squeezing is indicative of the predicted pair-correlations in a spinor condensate and lay the foundation for future experiments involving spin-squeezing and entanglement measurements. We have investigated the limits of the imaging techniques used in our lab, absorption and fluorescence imaging, and have developed the capability to measure atoms numbers with an uncertainly < 10 atoms. Condensates as small as ≈ 10 atoms were imaged and the measured fluctuations agree well with the theoretical predictions. Furthermore, we implement a reliable calibration method of our imaging system based on quantum projection noise measurements. We have resolved the individual lattice sites of a standing-wave potential created by a CO2 laser, which has a lattice spacing of 5.3 µm. Using microwaves, we site-selectively address and manipulate the condensate and therefore demonstrate the ability to perturb the lattice condensate of a local level. Interference between condensates in adjacent lattice sites and lattice sites separated by a lattice site are observed.
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Nicolas, Rana. "Squeezing light in nanoparticle-film plasmonic metasurface : from nanometric to atomically thin spacer." Thesis, Troyes, 2015. http://www.theses.fr/2015TROY0028/document.

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Les plasmons polaritons de surface (SPP) et les plasmons localisés de surface (LSP) font l’objet de nombreuses investigations du fait de leur fort potentiel technologique. Récemment, une attention particulière a été portée à des systèmes supportant ces deux types de résonances en déposant des nanoparticules (NPs) métalliques sur des films minces métalliques. Plusieurs études ont mis en évidence le couplage et l’hybridation entre modes localisés et délocalisés. Cependant, une compréhension en profondeur des propriétés optiques et du potentiel de ces interfaces est toujours manquante. Nous avons mené ici une étude de systèmes NPs/film couplés. Nous avons étudié à la fois expérimentalement et théoriquement l’influence d’une couche séparatrice ultra-mince en SiO2 ainsi que l’évolution des différents modes plasmoniques pour différentes épaisseurs. Nous avons ainsi mis en lumière que de tels systèmes couplés offrent des propriétés optiques exaltées et une large accordabilité spectrale. Nous avons aussi cherché à diminuer l’épaisseur de la couche séparatrice vers le cas ultime monoatomique en utilisant le graphène. Du fait du caractère non-diélectrique de celui-ci, nous avons mis en évidence un comportement optique inattendu de la résonance plasmonique. Nous avons expliqué celui-ci par la mise en évidence du dopage du graphène par les NPs, ce qui est un premier pas en direction de dispositifs optoélectroniques à base de graphène. Enfin, après avoir amélioré notre compréhension théorique de ces systèmes, nous avons évalué leur potentiel comme capteurs SERS ou LSP
Surface plasmon polariton (SPP) and Localized surface plasmon (LSP) have attracted numerous researchers due to their high technological potential. Recently, strong attention was paid to the potential of SPP and LSP combinations by investigating metallic nanoparticles (NPs) on top of metallic thin films. Several studies on such systems have shown the coupling and hybridization between localized and delocalized modes. In this work, we propose a full systematic study on coupled NP/film systems with Au NPs and Au films. We investigate both experimentally and theoretically the influence of an ultra-thin SiO2 dielectric spacer layer, as well as the evolution of the plasmonic modes as the spacer thickness increases. We show that coupled systems exhibit enhanced optical properties and larger tunability compared to uncoupled systems. We also compare these results with those measured for coupled interfaces using graphene as a non-dielectric sub-nanometer spacer. Introducing graphene adds complexity to the system. We show that such coupled systems also exhibit enhanced optical properties and larger tunability of their spectral properties compared to uncoupled systems as well as unexpected optical behavior. We explain this behavior by evidencing graphene doping by metallic NPs, which can be a first step towards graphene based optoelectronic devices. After establishing a deep understanding of coupled systems we perform both SERS and RI sensing measurements to validate the high potential of these plasmonic interfaces
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Seok, HyoJun. "Aspects Of Multimode Quantum Optomechanics." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/332877.

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This dissertation aims to investigate systems in which several optical and mechanical degrees of freedom are coupled through optomechanical interactions. Multimode optomechanics creates the prospect of integrated functional devices and it allows us to explore new types of optomechanical interactions which account for collective dynamics and optically mediated mechanical interactions. Owing to the development of fabrication techniques for micro- and nano-sized mechanical elements, macroscopic mechanical oscillators can be cooled to the deep quantum regime via optomechanical interaction. Based on the possibility to control the motion of mechanical oscillators at the quantum level, we design several schemes involving mechanical systems of macroscopic length and mass scales and we explore the nonlinear dynamics of mechanical oscillators. The first scheme includes a quantum cantilever coupled to a classical tuning fork via magnetic dipole-dipole interaction and also coupled to a single optical field mode via optomechanical interaction. We investigate the generation of nonclassical squeezed states in the quantum cantilever and their detection by transferring them to the optical field. The second scheme involves a quantum membrane coupled to two optical modes via optomechanical interaction. We explore dynamic stabilization of an unstable position of a quantum mechanical oscillator via modulation of the optical fields. We then develop a general formalism to fully describe cavity mediated mechanical interactions. We explore a rather general configuration in which multiple mechanical oscillators interact with a single cavity field mode. We specifically consider the situation in which the cavity dissipation is the dominant source of damping so that the cavity field follows the dynamics of the mechanical modes. In particular, we study two limiting regimes with specific applications: the weak-coupling regime and single-photon strong-coupling regime. In the weak-coupling regime, we build a protocol for quantum state transfer between mechanical modes. In the single-photon coupling regime, we investigate the nonlinear nature of the mechanical system which generates bistability and bifurcation in the classical analysis and we also explore how these features manifest themselves in interference, entanglement, and correlation in the quantum theory.
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Lam, Ping Koy, and Ping Lam@anu edu au. "Applications of Quantum Electro-Optic Control and Squeezed Light." The Australian National University. Faculty of Science, 1999. http://thesis.anu.edu.au./public/adt-ANU20030611.170800.

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In this thesis, we report the observations of optical squeezing from second harmonic generation (SHG), optical parametric oscillation (OPO) and optical parametric amplification (OPA). Demonstrations and proposals of applications involving the squeezed light and electro-optic control loops are presented. ¶ In our SHG setup, we report the observation of 2.1 dB of intensity squeezing on the second harmonic (SH) output. Investigations into the system show that the squeezing performance of a SHG system is critically affected by the pump noise and a modular theory of noise propagation is developed to describe and quantify this effect. Our experimental data has also shown that in a low-loss SHG system, intra-cavity nondegenerate OPO modes can simultaneously occur. This competition of nonlinear processes leads to the optical clamping of the SH output power and in general can degrade the SH squeezing. We model this competition and show that it imposes a limit to the observable SH squeezing. Proposals for minimizing the effect of competition are presented. ¶ In our OPO setup, we report the observation of 7.1 dB of vacuum squeezing and more than 4 dB of intensity squeezing when the OPO is operating as a parametric amplifier. We present the design criteria and discuss the limits to the observable squeezing from the OPO.We attribute the large amount of squeezing obtained in our experiment to the high escape efficiency of the OPO. The effect of phase jitter on the squeezing of the vacuum state is modeled. ¶ The quantum noise performance of an electro-optic feedforward control loop is investigated. With classical coherent inputs, we demonstrate that vacuum fluctuations introduced at the beam splitter of the control loop can be completely cancelled by an optimum amount of positive feedforward. The cancellation of vacuum fluctuations leads to the possibility of noiseless signal amplification with the feedforward loop. Comparison shows that the feedforward amplifier is superior or at least comparable in performance with other noiseless amplification schemes. When combined with an injection-locked non-planar ring Nd:YAG laser, we demonstrate that signal and power amplifications can both be noiseless and independently variable. ¶ Using squeezed inputs to the feedforward control loop, we demonstrate that information carrying squeezed states can be made robust to large downstream transmission losses via a noiseless signal amplification. We show that the combination of a squeezed vacuum meter input and a feedforward loop is a quantum nondemolition (QND) device, with the feedforward loop providing an additional improvement on the transfer of signal. In general, the use of a squeezed vacuum meter input and an electro-optic feedforward loop can provide pre- and post- enhancements to many existing QND schemes. ¶ Finally, we proposed that the quantum teleportation of a continuous-wave optical state can be achieved using a pair of phase and amplitude electro-optic feedforward loops with two orthogonal quadrature squeezed inputs. The signal transfer and quantum correlation of the teleported optical state are analysed. We show that a two dimensional diagram, similar to the QND figures of merits, can be used to quantify the performance of a teleporter.
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Books on the topic "Optical squeezing"

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Drummond, Peter D. Quantum Squeezing. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004.

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(Editor), P. D. Drummond, and Z. Ficek (Editor), eds. Quantum Squeezing. Springer, 2004.

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Kenyon, Ian R. Quantum 20/20. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198808350.001.0001.

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This text reviews fundametals and incorporates key themes of quantum physics. One theme contrasts boson condensation and fermion exclusivity. Bose–Einstein condensation is basic to superconductivity, superfluidity and gaseous BEC. Fermion exclusivity leads to compact stars and to atomic structure, and thence to the band structure of metals and semiconductors with applications in material science, modern optics and electronics. A second theme is that a wavefunction at a point, and in particular its phase is unique (ignoring a global phase change). If there are symmetries, conservation laws follow and quantum states which are eigenfunctions of the conserved quantities. By contrast with no particular symmetry topological effects occur such as the Bohm–Aharonov effect: also stable vortex formation in superfluids, superconductors and BEC, all these having quantized circulation of some sort. The quantum Hall effect and quantum spin Hall effect are ab initio topological. A third theme is entanglement: a feature that distinguishes the quantum world from the classical world. This property led Einstein, Podolsky and Rosen to the view that quantum mechanics is an incomplete physical theory. Bell proposed the way that any underlying local hidden variable theory could be, and was experimentally rejected. Powerful tools in quantum optics, including near-term secure communications, rely on entanglement. It was exploited in the the measurement of CP violation in the decay of beauty mesons. A fourth theme is the limitations on measurement precision set by quantum mechanics. These can be circumvented by quantum non-demolition techniques and by squeezing phase space so that the uncertainty is moved to a variable conjugate to that being measured. The boundaries of precision are explored in the measurement of g-2 for the electron, and in the detection of gravitational waves by LIGO; the latter achievement has opened a new window on the Universe. The fifth and last theme is quantum field theory. This is based on local conservation of charges. It reaches its most impressive form in the quantum gauge theories of the strong, electromagnetic and weak interactions, culminating in the discovery of the Higgs. Where particle physics has particles condensed matter has a galaxy of pseudoparticles that exist only in matter and are always in some sense special to particular states of matter. Emergent phenomena in matter are successfully modelled and analysed using quasiparticles and quantum theory. Lessons learned in that way on spontaneous symmetry breaking in superconductivity were the key to constructing a consistent quantum gauge theory of electroweak processes in particle physics.
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Book chapters on the topic "Optical squeezing"

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Lugiato, L. A., M. Vadacchino, and F. Castelli. "Squeezing in Optical Bistability." In Squeezed and Nonclassical Light, 161–74. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4757-6574-8_12.

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Haus, Hermann A. "Squeezing in Fibers." In Electromagnetic Noise and Quantum Optical Measurements, 417–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04190-1_13.

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Peřinova, V., C. Sibilia, M. Bertolotti, and J. Peřina. "Principal Squeezing in Optical Devices." In Coherence and Quantum Optics VI, 891–95. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-0847-8_162.

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Haus, Hermann A. "Phase-Sensitive Amplification and Squeezing." In Electromagnetic Noise and Quantum Optical Measurements, 379–416. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04190-1_12.

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Ficek, Zbigniew, and Ryszard Tanaś. "Dipole Squeezing and Spin Squeezed States." In Springer Series in Optical Sciences, 335–72. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-3740-0_10.

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Haus, Hermann A. "Quantum Theory of Solitons and Squeezing." In Electromagnetic Noise and Quantum Optical Measurements, 445–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04190-1_14.

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Levenson, M. D., R. M. Shelby, and S. H. Perlmutter. "Quantum Nondemolition Detection and Squeezing in Optical Fibers." In Laser Spectroscopy VIII, 150–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-540-47973-4_38.

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Slusher, R. E., L. Hollberg, B. Yurke, and J. C. Mertz. "Squeezing Light Noise in a Cavity Near the Vacuum Fluctuation Level." In Springer Series in Optical Sciences, 262–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-540-39664-2_81.

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Giacobino, E., C. Fabre, A. Heidmann, S. Reynaud, and L. Lugiato. "Squeezing, Bistability and Instability in the Optical Parametric Oscillator." In Springer Proceedings in Physics, 13–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74951-3_2.

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Galatola, P., L. A. Lugiato, M. G. Porreca, and P. Tombesi. "Optical Switching Induced by the Variation of the Squeezing Phase." In Springer Proceedings in Physics, 38–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76373-1_4.

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Conference papers on the topic "Optical squeezing"

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Stefszky, Michael, Sheon Chua, Conor M. Mow-Lowry, Daniel A. Shaddock, Ben C. Buchler, Ping Koy Lam, and David E. McClelland. "Low Frequency Optical Squeezing." In International Quantum Electronics Conference. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/iqec.2011.i769.

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Chaves, Julio C., Simone Sorgato, Pablo Benitez, Juan C. Miñano, Waqidi Falicoff, and Ruben Mohedano. "Étendue-squeezing light injector." In SPIE Optical Engineering + Applications, edited by Roland Winston and Jeffrey M. Gordon. SPIE, 2015. http://dx.doi.org/10.1117/12.2189302.

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Stefszky, Michael, Matteo Santandrea, Felix vom Bruch, Christof Eigner, Raimund Ricken, Viktor Quiring, Harald Herrmann, and Christine Silberhorn. "Waveguide Resonators for Optical Squeezing." In CLEO: Applications and Technology. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/cleo_at.2021.am1s.4.

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Yonezawa, Hidehiro, Daisuke Nakane, Trevor A. Wheatley, Kohjiro Iwasawa, Shuntaro Takeda, Hajime Arao, Dominic W. Berry, et al. "Squeezing-enhanced adaptive optical phase estimation." In Quantum Electronics and Laser Science Conference. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/qels.2011.qfd5.

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Feng, Sheng. "Balanced-heterodyne detection of optical squeezing." In Photonics Asia, edited by Qihuang Gong, Guang-Can Guo, and Yuen-Ron Shen. SPIE, 2012. http://dx.doi.org/10.1117/12.2000996.

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Dutt, Avik, Kevin Luke, Sasikanth Manipatruni, Alexander L. Gaeta, Paulo A. Nussenzveig, and Michal Lipson. "Observation of On-Chip Optical Squeezing." In Conference on Coherence and Quantum Optics. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/cqo.2013.m6.67.

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Pe'er, Avi. "Squeezing-enhancement of optical gyroscopic detection." In Optical and Quantum Sensing and Precision Metrology II, edited by Selim M. Shahriar and Jacob Scheuer. SPIE, 2022. http://dx.doi.org/10.1117/12.2617223.

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Lenzini, F., J. Janousek, O. Thearle, M. Villa, B. Haylock, S. Kasture, L. Cui, et al. "Squeezing in lithium niobate waveguides." In AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019, edited by Arnan Mitchell and Halina Rubinsztein-Dunlop. SPIE, 2019. http://dx.doi.org/10.1117/12.2539899.

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Otterstrom, Nils, Raphael Pooser, and Benjamin Lawrie. "Nonlinear optical magnetometry with accessible in situ optical squeezing." In CLEO: QELS_Fundamental Science. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/cleo_qels.2015.fth1b.4.

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Dutt, Avik, Kevin Luke, Alexander L. Gaeta, Paulo Nussenzveig, and Michal Lipson. "On-chip optical squeezing and quantum correlations." In Latin America Optics and Photonics Conference. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/laop.2014.ltu3b.1.

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Reports on the topic "Optical squeezing"

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Shomer, Ilan, Louise Wicker, Uzi Merin, and William L. Kerr. Interactions of Cloud Proteins, Pectins and Pectinesterases in Flocculation of Citrus Cloud. United States Department of Agriculture, February 2002. http://dx.doi.org/10.32747/2002.7580669.bard.

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The overall objective was to understand the cloud flocculation of citrus juice by characterization of the interactions between proteins and pectins, and to determine the role of PE isozymes in catalyzing this phenomenon. Specific objectives were to: 1. identify/characterize cloud-proteins in relation to their coagulable properties and affinity to pectins; 2. to determine structural changes of PME and other proteins induced by cation/pectin interactions; 3. localize cloud proteins, PME and bound protein/pectates in unheated and pasteurized juices; 4. to create "sensitized" pectins and determine their effect on clarification. The original objectives were not changed but the methods and approach were modified due to specific research requirements. Two i postulates were: 1. there is a specific interaction of cloud proteins with de-esterified regions of ! pectin and this contributes to cloud loss; 2. isozymes of pectin-methyl-esterase (PME) vary in efficiency to create sensitized pectins. The appearance of citrus fruit juice is an important quality factor and is determined by the color and turbidity that .are conferred by the suspended particles, i.e., by the cloud and its homogeneity. Under some circumstances the cloud tend to flocculate and the juice clarifies. The accepted approach to explain the clarification is based on pectin demethoxylation by PME that promotes formation of Ca-pectate. Therefore, the juice includes immediate heat-inactivation upon ~ squeezing. Protein coagulation also promotes cloud instability of citrus fruit extracts. However, the clarification mechanism is not fully understood. Information accumulated from several laboratories indicates that clarification is a more complex process than can be explained by a single mechanism. The increasing trend to consume natural-fresh juice emphasizing the importance of the knowledge to assure homogeneity of fresh juice. The research included complementary directions: Conditions that induce cloud-instability of natural- juice [IL]. Evaluate purification schemes of protein [USA]. Identifications of proteins, pectin and neutral sugars ([IL]; Structure of the cloud components using light and electron microscopy and immuno-labeling of PME, high-methoxyl-pectin (HMP) and low-methoxyl-pectin (LMP); Molecular weight of calcium sensitized pectins [US]; Evaluation of the products of PME activity [US]. Fractions and size distribution and cloud components [IL-US]. The optimal pH activity of PME is 7 and the flocculation pH of the cloud is 3-4. Thus, the c roles of PME, proteins and pectins in the cloud instability, were studied in pH ranges of 2- 7. The experiments led to establish firstly repeatable simulate conditions for cloud instability [IL]. Thermostable PME (TS-PE) known to induce cloud instability, but also thermolabile forms of PME (TL-PE) caused clarification, most likely due to the formation and dissolution of inactive :. PE-pectin complexes and displacement of a protective colloid from the cloud surface [US]. Furthermore, elimination of non-PME protein increases TS-PE activity, indicating that non-PME proteins moderate PME activity [US]. Other experiments Concomitantly with the study of the PME activity but promotes the association of cloud-proteins to pectin. Adjusting of the juice pH to f 7 retains the cloud stability and re-adjusting of the pH to 40% DE reacts to immuno-labeling in the cloud fragments, whereas
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