Relevant bibliographies by topics / Brillouin memory

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Brillouin memory'

Author: Grafiati
Published: 1 March 2025

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Journal articles on the topic "Brillouin memory"

1

Chen, Yao, Fangxing Zhang, Tian Qin, Guolin Zhao, Jiankun Hou, Xianfeng Chen, Li Ge, and Wenjie Wan. "Exceptional points with memory in a microcavity Brillouin laser." Optica 9, no. 9 (August 23, 2022): 971. http://dx.doi.org/10.1364/optica.456977.

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Exceptional points (EPs), universally present in non-Hermitian systems, often reveal some critical behaviors such as topological encircling chirality and ultrahigh enhanced sensing near such singularities. However, most of the experimental realizations of EPs have been limited to the linear regime, where system nonlinearity has been omitted. Here, we experimentally observe two distinct EPs with opposite hermiticities and demonstrate a parity–time phase transition with exotic memory effects near the EPs in a nonlinear and non-Hermitian system based on a stimulated Brillouin laser in an optical microcavity. The self-phase modulation induced nonlinearity effectively alters the EP location, surprisingly, in an asymmetric manner, resulting in a bistable memory effect. Moreover, two EPs with opposite hermiticities in the same system are found to show quite distinct behaviors in such a memory effect. This scheme completes the studies of non-Hermitian physics in a more general scenario by including nonlinearity and paves the way toward optical memory for all-optical signal processing and quantum information.
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Zerbib, Maxime, Maxime Romanet, Thibaut Sylvestre, Christian Wolff, Birgit Stiller, Jean-Charles Beugnot, and Kien Phan Huy. "Spin-orbit interaction through Brillouin scattering in nanofibers." EPJ Web of Conferences 287 (2023): 06011. http://dx.doi.org/10.1051/epjconf/202328706011.

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Spin-orbit interactions (SOI), describing the transfer of a spin degree of freedom to an orbital angular momentum (OAM), have been widely explored in recent opto-acoustic studies for applications mainly in spintronics and for topological insulators [1]. We report the observation of SOI by Brillouin scattering in an optical nanofiber. Specifically, we describe the transfer of a spin degree of freedom from light incident to the nanofiber to an acoustic vortex with a topological charge of order 2 in the form of OAM. Coupled with the phase matching condition for the energy conservation during Brillouin scattering, it results in a backscattered wave with a spin opposite to the incident wave. This observation allows considering applications of opto-acoustic Brillouin memory based on polarization conversion through a SOI [2].
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Steelman, Zachary A., Andrew C. Weems, Andrew J. Traverso, Jason M. Szafron, Duncan J. Maitland, and Vladislav V. Yakovlev. "Revealing the glass transition in shape memory polymers using Brillouin spectroscopy." Applied Physics Letters 111, no. 24 (December 11, 2017): 241904. http://dx.doi.org/10.1063/1.4999803.

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Dürr, Stephan. "Optimization of the Brillouin operator on the KNL architecture." EPJ Web of Conferences 175 (2018): 02001. http://dx.doi.org/10.1051/epjconf/201817502001.

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Experiences with optimizing the matrix-times-vector application of the Brillouin operator on the Intel KNL processor are reported. Without adjustments to the memory layout, performance figures of 360 Gflop/s in single and 270 Gflop/s in double precision are observed. This is with Nc = 3 colors, Nv = 12 right-hand-sides, Nthr = 256 threads, on lattices of size 323 × 64, using exclusively OMP pragmas. Interestingly, the same routine performs quite well on Intel Core i7 architectures, too. Some observations on the much harderWilson fermion matrix-times-vector optimization problem are added.
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Riley, Grant A., Justin M. Shaw, Thomas J. Silva, and Hans T. Nembach. "Simultaneous measurement of the exchange parameter and saturation magnetization using propagating spin waves." Applied Physics Letters 120, no. 11 (March 14, 2022): 112405. http://dx.doi.org/10.1063/5.0083583.

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The exchange interaction in ferromagnetic ultra thin films is a critical parameter in magnetization-based storage and logic devices, yet the accurate measurement of it remains a challenge. While a variety of approaches are currently used to determine the exchange parameter, each has its limitations, and good agreement among them has not been achieved. To date, neutron scattering, magnetometry, Brillouin light scattering, spin-torque ferromagnetic resonance spectroscopy, and Kerr microscopy have all been used to determine the exchange parameter. Here, we present a method that exploits the wavevector selectivity of Brillouin light scattering to measure the spin wave dispersion in both the backward volume and Damon–Eshbach orientations. The exchange, saturation magnetization, and magnetic thickness are then determined by a simultaneous fit of both dispersion branches with general spin wave theory without any prior knowledge of the thickness of a magnetic “dead layer.” In this work, we demonstrate the strength of this technique for ultrathin metallic films, typical of those commonly used in industrial applications for magnetic random-access memory.
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Khusnutdinoff, R. M. "Dynamics of Liquid Lithium Atoms: Time Scales and Dynamic Correlation Functions." Nonlinear Phenomena in Complex Systems 23, no. 1 (April 14, 2020): 90–96. http://dx.doi.org/10.33581/1561-4085-2020-23-1-90-96.

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Based on the configuration data on molecular dynamics simulation of the lithium melt near the melting point, the memory functions of the relaxation process of the density fluctuations are calculated. It is established that for the range of wave numbers corresponding to microscopic spatial scales, the memory functions of the first four orders are characterized by oscillating behavior. This feature indicates that the model memory functions in the case of phenomenological description of the dynamics of the density fluctuations can not have the form of monotonically decreasing functions. The frequency characteristics of the dynamic structure factor for a wide range of wave numbers are calculated. The convergence of the relaxation parameters Δ4(k) and Δ5(k) for the range of wave numbers from the hydrodynamic regime (k → 0) to the values of k is higher than the boundary of the first pseudo-Brillouin zone (for k ≈ 0.87km) are detected. The characteristic time scales of the process of structural relaxation of the density fluctuations are determined.
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SHANG Qiufeng, 尚秋峰, and 李雪丽 LI Xueli. "基于LSTM的布里渊增益谱提取方法." ACTA PHOTONICA SINICA 52, no. 1 (2023): 0106004. http://dx.doi.org/10.3788/gzxb20235201.0106004.

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Kotlicki, Omer, and Jacob Scheuer. "Thermal self-stability, multi-stability, and memory effects in single-mode Brillouin fiber lasers." Optics Express 25, no. 22 (October 23, 2017): 27321. http://dx.doi.org/10.1364/oe.25.027321.

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Matveyev, A. Z., and G. A. Pasmanik. "Realization of associative memory with the aid of a nonlinear selective stimulated-Brillouin-scattering mirror." Quantum Electronics 23, no. 5 (May 31, 1993): 426–31. http://dx.doi.org/10.1070/qe1993v023n05abeh003088.

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Melin, Jeanette, Stefan Cano, and Leslie Pendrill. "The Role of Entropy in Construct Specification Equations (CSE) to Improve the Validity of Memory Tests." Entropy 23, no. 2 (February 9, 2021): 212. http://dx.doi.org/10.3390/e23020212.

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Commonly used rating scales and tests have been found lacking reliability and validity, for example in neurodegenerative diseases studies, owing to not making recourse to the inherent ordinality of human responses, nor acknowledging the separability of person ability and item difficulty parameters according to the well-known Rasch model. Here, we adopt an information theory approach, particularly extending deployment of the classic Brillouin entropy expression when explaining the difficulty of recalling non-verbal sequences in memory tests (i.e., Corsi Block Test and Digit Span Test): a more ordered task, of less entropy, will generally be easier to perform. Construct specification equations (CSEs) as a part of a methodological development, with entropy-based variables dominating, are found experimentally to explain (r=R2 = 0.98) and predict the construct of task difficulty for short-term memory tests using data from the NeuroMET (n = 88) and Gothenburg MCI (n = 257) studies. We propose entropy-based equivalence criteria, whereby different tasks (in the form of items) from different tests can be combined, enabling new memory tests to be formed by choosing a bespoke selection of items, leading to more efficient testing, improved reliability (reduced uncertainties) and validity. This provides opportunities for more practical and accurate measurement in clinical practice, research and trials.
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Dissertations / Theses on the topic "Brillouin memory"

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Zerbib, Maxime. "Interactions Brillouin et opto-acoustiques dans les nanofibres optiques." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCD062.

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Les interactions opto-acoustiques sont des phénomènes physiques à l’interface entre les domaines de l'optique et de l'acoustique. Cette thèse porte sur une investigation théorique et expérimentale d’effets opto-acoustiques basés sur la diffusion Brillouin dans des nanofibres optiques de silice. Grâce à leurs dimensions transverses inférieures aux longueurs d’onde optiques infrarouges, ces guides possèdent des propriétés uniques, ouvrant la voie à des applications pour la réalisation de capteurs, le traitement du signal et l'information quantique. Nous présentons dans ce manuscrit un nouveau procédé de fabrication de nanofibres optiques à haute transmission, basé sur une approche qui améliore la flexibilité dans la conception des guides. Cette avancée permet notamment de concevoir des guides sur mesure pour favoriser certains effets opto-acoustiques, tels que la diffusion Brillouin intermodale ou stimulée. La caractérisation du spectre Brillouin des nanofibres est réalisée pour la première fois dans le régime de diffusion stimulée, mettant en avant un forte efficacité de l’interaction sur les différentes résonances acoustiques. Le gain Brillouin intrinsèque dans une nanofibre a été mesuré et est jusqu'à 40 fois supérieur au gain d'une fibre standard SMF-28. À notre connaissance, cela représente la première démonstration d'un effet laser Brillouin dans une nanofibre. Une investigation théorique et expérimentale d’une interaction spin-orbite opto-acoustique par diffusion Brillouin dans une nanofibre optique est réalisée. Le phénomène est une conséquence directe de la conservation du moment angulaire. Ce principe fondamental impose ici un échange entre le degré de spin de la lumière incidente, incarné par sa polarisation, le moment angulaire orbital de l'onde-vortex acoustique TR21, et le spin de l'onde Brillouin diffusée. Enfin, nous implémentons une mémoire opto-acoustique Brillouin sensible à la polarisation dans une nanofibre, qui permet d'envisager le stockage de l’état de polarisation de la lumière au sein d'une onde acoustique et un traitement opto-acoustique de l'information
Opto-acoustic interactions are physical phenomena at the interface between the fields of optics and acoustics. This thesis focuses on a theoretical and experimental investigation of Brillouin scattering opto-acoustic effects in silica optical nanofibers. Due to their transverse dimensions being smaller than optical wavelengths, these waveguides exhibit unique properties, paving the way for applications in sensing, signal processing, and quantum information. In this manuscript, we present a new high-transmission optical nanofiber fabrication model based on an approach that enhances design flexibility for waveguides. This advancement allows for the custom design of waveguides to favor specific opto-acoustic effects, such as intermodal or stimulated Brillouin scattering. For the first time, the Brillouin spectrum characterization of nanofibers is conducted in the stimulated scattering regime, highlighting a strong interaction efficiency across different acoustic resonances. The intrinsic Brillouin gain in a nanofiber has been measured to be up to 40 times higher than that of a standard SMF-28 fiber, enabling the demonstration of a Brillouin laser effect in the nanofiber. A theoretical and experimental investigation of opto-acoustic spin-orbit interaction via Brillouin scattering in an optical nanofiber is also carried out. The phenomenon is a direct consequence of the fundamental principle of angular momentum conservation, which involves an exchange between the spin degree of the incident light, embodied by its polarization, the orbital angular momentum carried by the TR21 acoustic vortex, and the spin of the scattered light. Finally, we implement a polarization-sensitive Brillouin opto-acoustic memory in a nanofiber, opening the way to storing information on the polarization state of light within an acoustic wave
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Conference papers on the topic "Brillouin memory"

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Merklein, Moritz, Birgit Stiller, Khu Vu, Stephen J. Madden, and Benjamin J. Eggleton. "A chip-integrated Brillouin-based optical memory." In 2017 Opto-Electronics and Communications Conference (OECC) and Photonics Global Conference (PGC). IEEE, 2017. http://dx.doi.org/10.1109/oecc.2017.8115040.

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MICHEL, L. "EXTREMA OFP-INVARIANT FUNCTIONS ON THE BRILLOUIN ZONE." In Scientific Highlights in Memory of Léon Van Hove. WORLD SCIENTIFIC, 1993. http://dx.doi.org/10.1142/9789812795977_0009.

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Geilen, Andreas, Steven Becker, and Birgit Stiller. "Order of Magnitude Increase in Storage Time of Brillouin-based Memory." In 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2023. http://dx.doi.org/10.1109/cleo/europe-eqec57999.2023.10232722.

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Kotlicki, Omer, and Jacob Scheuer. "Thermal self-stability, multi-stability, and memory effects in Brillouin fiber lasers." In SPIE OPTO, edited by Selim M. Shahriar and Jacob Scheuer. SPIE, 2017. http://dx.doi.org/10.1117/12.2261121.

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Stiller, Birgit, Moritz Merklein, Atiyeh Zarifi, and Benjamin J. Eggleton. "Tailoring Brillouin scattering for optical memory and sensing applications on chip (Conference Presentation)." In Integrated Optics: Devices, Materials, and Technologies XXII, edited by Sonia M. García-Blanco and Pavel Cheben. SPIE, 2018. http://dx.doi.org/10.1117/12.2295622.

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Stiller, Birgit, Moritz Merklein, Khu Vu, Stephen J. Madden, and Benjamin J. Eggleton. "Access to acoustic decay time in photonic circuits via Brillouin-based phononic memory." In Nonlinear Photonics. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/np.2016.nth3a.5.

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