椭圆光声谐振腔中偏振控制的布里渊散射
Polarization-controlled Brillouin scattering in elliptical optophononic resonators
AI总结：
研究椭圆光声微柱谐振腔中基于偏振的滤波技术，通过优化激光偏振态与微柱椭圆度实现近乎无背景的布里渊散射检测，推动纳米结构高效检测在光机械与量子通信领域的应用。
摘要：
光机械应用的快速发展推动了布里渊散射研究的进步。特别是，纳米尺度下高频声学声子的研究因与物质中其他激发存在大范围相互作用而备受关注。然而，标准的布里渊光谱方案依赖于固定波长滤波，这限制了其在可调谐光声谐振腔研究中的适用性。最近的研究表明，椭圆光声微柱谐振腔会对布里渊散射和弹性瑞利散射产生不同的能量依赖偏振态，并且可以实施偏振滤波装置来提高光非弹性散射与弹性散射之间的对比度。当激光和布里渊信号的偏振态相互正交时，可以达到最佳滤波配置。在这项工作中，我们从理论上研究了这种基于偏振的滤波技术参数，以提高布里渊散射检测的效率。为了优化滤波，我们探索了入射激光的初始波长和偏振态，以及微柱的椭圆度，并达到了几乎最优的配置，实现了近乎无背景的布里渊检测。我们的研究成果在纳米结构中布里渊散射的高效检测方面迈出了一步，可潜在应用于光机械和量子通信等领域。
英文摘要：
The fast-growing development of optomechanical applications has motivated advancements in Brillouin scattering research. In particular, the study of high frequency acoustic phonons at the nanoscale is interesting due to large range of interactions with other excitations in matter. However, standard Brillouin spectroscopy schemes rely on fixed wavelength filtering, which limits the usefulness for the study of tunable optophononic resonators. It has been recently demonstrated that elliptical optophononic micropillar resonators induce different energy-dependent polarization states for the Brillouin and the elastic Rayleigh scattering, and that a polarization filtering setup could be implemented to increase the contrast between the inelastic and elastic scattering of the light. An optimal filtering configuration can be reached when the polarization states of the laser and the Brillouin signal are orthogonal from each other. In this work, we theoretically investigate the parameters of such polarization-based filtering technique to enhance the efficiency of Brillouin scattering detection. For the filtering optimization, we explore the initial wavelength and polarization state of the incident laser, as well as in the ellipticity of the micropillars, and reach an almost optimal configuration for nearly background-free Brillouin detection. Our findings are one step forward on the efficient detection of Brillouin scattering in nanostructures for potential applications in fields such as optomechanics and quantum communication.
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