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Academic literature on the topic 'Red detuned optical lattices'

Author: Grafiati
Published: 10 March 2023

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Journal articles on the topic "Red detuned optical lattices"

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Hou, Xiaokai, Shuo Liu, Xin Wang, Feifei Lu, Jun He, and Junmin Wang. "Suppression of laser beam’s polarization and intensity fluctuation via a Mach–Zehnder interferometer with proper feedback." AIP Advances 13, no. 1 (January 1, 2023): 015218. http://dx.doi.org/10.1063/5.0133775.

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Long ground-Rydberg coherence lifetime is interesting for implementing high-fidelity quantum logic gates, many-body physics, and other quantum information protocols. However, the potential well formed by a conventional far-off-resonance red-detuned optical-dipole trap that is attractive for ground-state cold atoms is usually repulsive for Rydberg atoms, which will result in the rapid loss of atoms and low repetition rate of the experimental sequence. Moreover, the coherence time will be sharply shortened due to the residual thermal motion of cold atoms. These issues can be addressed by a one-dimensional magic lattice trap, which can form a deeper potential trap than the traveling wave optical dipole trap when the output power is limited. In addition, these common techniques for atomic confinement generally have certain requirements for the polarization and intensity stability of the laser. Here, we demonstrated a method to suppress both the polarization drift and power fluctuation only based on the phase management of the Mach–Zehnder interferometer for a one-dimensional magic lattice trap. With the combination of three wave plates and the interferometer, we used the instrument to collect data in the time domain, analyzed the fluctuation of laser intensity, and calculated the noise power spectral density. We found that the total intensity fluctuation comprising laser power fluctuation and polarization drift was significantly suppressed, and the noise power spectral density after closed-loop locking with a typical bandwidth of 1–3000 Hz was significantly lower than that under the free running of the laser system. Typically, at 1000 Hz, the noise power spectral density after locking was about 10 dB lower than that under the free running of a master oscillator power amplifier system. The intensity–polarization control technique provides potential applications for atomic confinement protocols that demand fixed polarization and intensity.
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Winoto, S., Marshall DePue, Nathan Bramall, and David Weiss. "Laser cooling at high density in deep far-detuned optical lattices." Physical Review A 59, no. 1 (January 1999): R19—R22. http://dx.doi.org/10.1103/physreva.59.r19.

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Piest, B., V. Vollenkemper, J. Böhm, A. Herbst, and E. M. Rasel. "Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders." Review of Scientific Instruments 93, no. 2 (February 1, 2022): 023202. http://dx.doi.org/10.1063/5.0071619.

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Wang Cheng, Xu Peng, He Xiao-Dong, Wang Jin, and Zhan Ming-Sheng. "Transferring single-atoms between two red-detuned far-off-resonance optical dipole traps." Acta Physica Sinica 61, no. 20 (2012): 203701. http://dx.doi.org/10.7498/aps.61.203701.

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Kudo, Tetsuhiro, Hajime Ishihara, and Hiroshi Masuhara. "Resonance optical trapping of individual dye-doped polystyrene particles with blue- and red-detuned lasers." Optics Express 25, no. 5 (February 21, 2017): 4655. http://dx.doi.org/10.1364/oe.25.004655.

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Pan, Deng, Hongxing Xu, and F. Javier García de Abajo. "Rotational Doppler cooling and heating." Science Advances 7, no. 2 (January 2021): eabd6705. http://dx.doi.org/10.1126/sciadv.abd6705.

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Doppler cooling is a widely used technique to laser cool atoms, molecules, and nanoparticles by exploiting the Doppler shift associated with translational motion. The rotational Doppler effect arising from rotational coordinate transformation should similarly enable optical manipulation of the rotational motion of nanosystems. Here, we show that rotational Doppler cooling and heating (RDC and RDH) effects embody rich and unexplored physics, including an unexpected strong dependence on particle morphology. For geometrically constrained particles, cooling and heating are observed at red- or blue-detuned laser frequencies relative to particle resonances. In contrast, for nanosystems that can be modeled as solid particles, RDH appears close to resonant illumination, while detuned frequencies produce cooling of rotation. We further predict that RDH can lead to optomechanical spontaneous chiral symmetry breaking, where an achiral particle under linearly polarized illumination starts spontaneously rotating. Our results open up new exciting possibilities to control the rotational motion of nanosystems.
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Li, Xiaoxia, Jingyan Li, Xuxin Cheng, and Guang-an Li. "Nonreciprocal transmission in a four-mode cavity magnonics system." Laser Physics Letters 19, no. 9 (August 10, 2022): 095208. http://dx.doi.org/10.1088/1612-202x/ac85e9.

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Abstract We propose a scheme to create optical nonreciprocal transmission in a double-cavity magnonics system, where one yttrium iron garnet sphere is placed in one of the cavities and a mechanical oscillator is shared by the coupled double microwave cavities. By manipulating the magnon–microwave photon coupling, we reveal the nonreciprocal propagation of electromagnetic fields at microwave frequencies in red and blue-detuned regimes. Furthermore, the nonreciprocal isolation ratio and group delay are analyzed. This scheme can inspire methods for constructing nonreciprocal devices.
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Wang, Zheng Ling, Ming Zhou, Wei Zhang, Chuan Yu Gao, and Guo Rong Cao. "Nanoscale Trap for Isolated Cold Atoms by the Nanoscale Solid-State System." Advanced Materials Research 304 (July 2011): 263–67. http://dx.doi.org/10.4028/www.scientific.net/amr.304.263.

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We propose a novel scheme to generate nanoscale optical trap for cold atoms near the tapered Ag nanotip, in which we take a microdisk cavity near the nanoscale trap and form a nanoscale solid-state system to realize the loading of the isolated cold atoms. We calculate the field distribution by the FDTD method near the nanotip, and discuss the intensity, the optical potential and van der Waals potential as well as the dipole force for 87Rb atoms. We find that the total potential and dipole force can form an attracting nanoscale trap for cold atoms with red-detuned field and it can realize the effective trapping and manipulation of the isolated atoms, which can enable efficient fluorescence photon collection and strong coupling in the coupled optical fiber.
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Yang, Qiulu, Dan Lu, Yiming He, Daibing Zhou, and Lingjuan Zhao. "High Optical Feedback Tolerance of a Detuned DBR Laser for 10-Gbps Isolator-Free Operation." Photonics 10, no. 1 (December 30, 2022): 38. http://dx.doi.org/10.3390/photonics10010038.

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The optical feedback tolerance (OFT) of a distributed Bragg reflector (DBR) laser was investigated experimentally. The static and modulation performance of the DBR laser under optical feedback was examined by evaluating its relative intensity noise (RIN) and bit error rate (BER). It is shown that the OFT of the DBR laser is closely related to its peak wavelength detuning relative to the Bragg wavelength. A high tolerance to optical feedback was demonstrated, both in the continuous wave (CW) and the direct modulation (DM) states, when the DBR laser was red-detuned relative to the Bragg wavelength. The excess RIN induced by optical feedback was well suppressed to a level of −140 dB/Hz at a feedback level of −9 dB in the CW state. In a 10 Gbps direct modulation state, bit error rates (BER) below 1 × 10−9 and 3 × 10−7 were obtained under a feedback level of −15 dB and −9 dB, respectively, for the case of back-to-back transmission. After 20 km fiber transmission, the BER still maintained below 1 × 10−7 under a feedback level of −15 dB, with a power penalty of less than 1 dB.
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He, Xiaodong, Shi Yu, Peng Xu, Jin Wang, and Mingsheng Zhan. "Combining red and blue-detuned optical potentials to form a Lamb-Dicke trap for a single neutral atom." Optics Express 20, no. 4 (January 31, 2012): 3711. http://dx.doi.org/10.1364/oe.20.003711.

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Dissertations / Theses on the topic "Red detuned optical lattices"

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Jones, Philip H. "Ultra-cold atoms in far-detuned optical lattices." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393245.

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ROSI, SARA. "Interacting Bosons in optical lattices: optimal control ground state production, entanglement characterization and 1D systems." Doctoral thesis, 2015. http://hdl.handle.net/2158/1004929.

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The work presented in this thesis concerns the study of quantum many-body physics by making use Bose-Einstein condensates loaded in optical lattices potentials. The first part describes the development of a new experimental strategy for the production of the degenerate atomic sample, the second part concerns the optimal control ground state production and the entanglement characterization on a systems of interacting Bosons across the superfluid - Mott insulator quantum phase transition, and the third part illustrates the study of the dynamical properties of an array of 1D gases performed via Bragg spectroscopy.
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Book chapters on the topic "Red detuned optical lattices"

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Putz, Mihai V., Marina A. Tudoran, and Marius C. Mirica. "Bondonic Electrochemistry." In Renewable and Alternative Energy, 277–359. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1671-2.ch010.

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The main concepts of electrochemistry are reviewed in a fundamental manner as well for the applicative approach of asymmetric currents in the galvanic cells; the whole electrochemical process is eventually combined with embedded the bondonic chemistry modeling the electronic charge transfer sensitizing the anode electrode and the overall photovoltaic effect through the electrolyte fulfilling the red-ox closed circuit; the resulted bondonic electrochemistry may be suited for integration with the fresh approach of sensitization of the solar cells by the bonding quantum dots (the bondots), see the preceding chapter of the same book, towards a bondonic-bondotic photo-electrochemical integrated and cost-effective photo-current conversion; it may be used as well as for laser-based technique in controlling the electrochemical effects with optical lattices acting towards condensing the electrons into bondons and controlling them thereof.
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Putz, Mihai V., Marina A. Tudoran, and Marius C. Mirica. "Bondonic Electrochemistry." In Sustainable Nanosystems Development, Properties, and Applications, 328–411. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0492-4.ch010.

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The main concepts of electrochemistry are reviewed in a fundamental manner as well for the applicative approach of asymmetric currents in the galvanic cells; the whole electrochemical process is eventually combined with embedded the bondonic chemistry modeling the electronic charge transfer sensitizing the anode electrode and the overall photovoltaic effect through the electrolyte fulfilling the red-ox closed circuit; the resulted bondonic electrochemistry may be suited for integration with the fresh approach of sensitization of the solar cells by the bonding quantum dots (the bondots), see the preceding chapter of the same book, towards a bondonic-bondotic photo-electrochemical integrated and cost-effective photo-current conversion; it may be used as well as for laser-based technique in controlling the electrochemical effects with optical lattices acting towards condensing the electrons into bondons and controlling them thereof.
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Conference papers on the topic "Red detuned optical lattices"

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Kalhor, Farid, Shoaib Mahmud, Noah F. Opondo, Leif Bauer, Pronoy Das, Li-Ping Yang, Sunil Bhave, and Zubin Jacob. "Optically Induced Static Magnetic Field for Nitrogen-vacancy Centers in Diamond." In CLEO: QELS_Fundamental Science. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_qels.2022.fth4m.6.

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We demonstrate a room-temperature optically induced magnetic field for nitrogen-vacancy centers in diamond. The effective magnetic field i s d etermined b y the photonic spin density of a red-detuned optical excitation. This opens a new frontier for studying exotic phases of photons as well as future on-chip applications.
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Kumar, Prem, and B. Matthew poelker. "Frequency correlated laser beam generation in sodium vapor: sodium-density and pump-intensity dependence." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.tus3.

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When sodium vapor is irradiated with a single-frequency dye laser (pump) tuned in the vicinity of either of the Doppler-broadened D lines and enclosed in an optical cavity, Raman shifted oscillation builds up, which is blue shifted for a blue-detuned pump and red shifted for a red-detuned pump by 1.772 GHz (sodium ground-state hyperfine splitting).1 The gain mechanism responsible for this Raman-laser action can be understood by modeling sodium as a three-level atom. The Raman laser frequency is highly correlated with that of the pump as demonstrated earlier by observing a beat frequency bandwidth between the two lasers of as low as 17 kHz.2 (The pump had rms frequency fluctuation of the order of 10 MHz.) For spectroscopic applications, for example, frequency correlated laser beams are commonly generated using acoustooptic techniques which are difficult to implement beyond the gigahertz region. The Raman laser technique is extendable, in principle, even to the millimeter range. Here we present measurements of the sodium-density and pump-intensity dependence of the Raman-laser output and compare the results with those predicted by the three-level-atom model.
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Zhang, Jun-Fu, Jia-Han Li, and Tony Wen-Hann Sheu. "Anisotropic Permittivities and Transmittance of Double Layer Graphene." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.7p_a404_8.

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Graphene is a two dimensional material consisted of honeycomb carbon lattices. Comparing to pure graphene, bilayer graphene is taking special interest due to the interlayer interactions. The interlayer coupling has the influences on the electronic and optical properties, which has crucial characteristics distinct from graphite. Ebernil et al. [1] reported that the single layer graphene has red-shifted surface plasmon modes from graphite at 4.7 eV and 14.6 eV. It illustrated that the dielectric function of graphene distinct from graphite. In this work, the permittivities of double layer graphene are numerically simulated using Density Functional Theory (DFT) method. Also, the transmittance of SiO2 substrate model, surface conductivity approach of graphene model, and DFT model are compared.
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