Topic
Brillouin scattering
About: Brillouin scattering is a research topic. Over the lifetime, 11426 publications have been published within this topic receiving 178306 citations.
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TL;DR: In this article, photoelastic coupling enhancement at exciton-polariton resonance reaches 10(5) at 30 K as compared to a typical bulk solid room temperature transparency value, which opens the path to huge displacement sensitivities and ultrastrong coupling regimes in cavity optomechanics with couplings g(0) in the range of 100 GHz.
Abstract: Polariton-mediated light-sound interaction is investigated through resonant Brillouin scattering experiments in GaAs/AlAs multiple-quantum wells. Photoelastic coupling enhancement at exciton-polariton resonance reaches 10(5) at 30 K as compared to a typical bulk solid room temperature transparency value. When applied to GaAs based cavity optomechanical nanodevices, this result opens the path to huge displacement sensitivities and to ultrastrong coupling regimes in cavity optomechanics with couplings g(0) in the range of 100 GHz.
44 citations
TL;DR: Simultaneous temperature and strain measurement with a distributed Brillouin loss system is proposed by use of the parameters BrillouIn frequency, power, and bandwidth, for PANDA, bow-tie, and tiger polarization-maintaining fibers for the first time to the authors' knowledge.
Abstract: Simultaneous temperature and strain measurement with a distributed Brillouin loss system is proposed by use of the parameters Brillouin frequency, power, and bandwidth, for PANDA, bow-tie, and tiger polarization-maintaining fibers for the first time to our knowledge. The expressions for simultaneous temperature and strain sensing and the maximum errors and rms values of temperature and strain measurements are derived with three combinations of the parameters: (1) power and Brillouin frequency, (2) bandwidth and Brillouin frequency, and (3) bandwidth and Brillouin power. Our experiments demonstrate that simultaneous temperature and strain sensing at 20-cm spatial resolution for Brillouin frequency combined with bandwidth the strain/temperature resolutions are 39 µe/2 °C (PANDA), 126 µe/3 °C (bow tie), and 598 µe/16 °C (tiger); for the Brillouin frequency combined with power the strain/temperature resolutions are 153 µe/8 °C (PANDA) and 237 µe/4 °C (bow tie); and for the bandwidth combined with power the strain/temperature resolutions are 135 µe/38 °C (PANDA) and 195 µe/38 °C (bow tie).
44 citations
TL;DR: A technique for the instantaneous frequency measurement of broadband signals is proposed based on stimulated Brillouin scattering in a single-mode optical fiber based on sideband management of the optical-modulation to verify the feasibility of the IFM.
Abstract: A technique for the instantaneous frequency measurement (IFM) of broadband signals is proposed based on stimulated Brillouin scattering (SBS) in a single-mode optical fiber. The instantaneous frequency and amplitude information is obtained by the narrowband filtering of the acoustic-optic interaction in the SBS process. Through sideband management of the optical-modulation, the IFM bandwidth can be far beyond the Brillouin frequency shift (i.e. ~11 GHz in 1550 nm). Proof-of-concept experiments for both the linearly frequency modulated pulse and frequency Costas coded pulse are carried out to verify the feasibility of the IFM.
44 citations
TL;DR: In this article, the authors used the Brillouin spectra from thermally excited surface acoustic phonons in GaAs and Si surfaces coated with a thin Al film and gave a theoretical explanation of the experimental results in terms of the coupling between the normal modes of the film and the substrate.
Abstract: Brillouin spectra from thermally excited surface acoustic phonons in GaAs and Si surfaces coated with a thin Al film are presented. The measurements show features different from the Al and the semiconductor surfaces. We are able to give a theoretical explanation of the experimental results in terms of the coupling between the normal modes of the film and of the substrate.
44 citations
TL;DR: In this paper, the authors showed that the interaction between two counterpropagating narrowband lightwaves (frequency difference = 20 GHz, λ=825 nm) in a monomode optical fiber can occur because of stimulated Brillouin scattering.
Abstract: Interactions between two counterpropagating narrowband lightwaves (frequency difference=20 GHz, λ=825 nm) in a monomode optical fibre can occur because of stimulated Brillouin scattering. Maximal signal gain of 10% is obtained for a pump power of 313 μW. The interactions extend over 500 MHz with two resonant frequencies.
44 citations