Light scattering by a periodically time-modulated object of arbitrary shape: The extended boundary condition method

IF 1.8 4区 物理与天体物理 Q3 OPTICS Journal of The Optical Society of America B-optical Physics Pub Date : 2023-10-12 DOI:10.1364/josab.502171
N. Stefanou, Ioannis Stefanou, Evangelos Almpanis, Nikos Papanikolaou, Puneet Garg, Carsten Rockstuhl
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Abstract

A proper generalization of the extended boundary condition method to calculate the transition matrix, T , for electromagnetic scattering from a homogeneous and isotropic body of arbitrary shape, characterized by a periodically time-varying electric permittivity, is presented. The application of the method on a specific example of a spheroidal dielectric particle confirms that time modulation induces strong inelastic scattering, accompanied by energy transfer between the scatterer and the light field, when the difference of the incident wave frequency to a particle optical resonance matches an integer multiple of the modulation frequency. Moreover, it is shown that, for nonspherical scatterers, these effects can be selectively tuned by external means such as the polarization and the propagation direction of the incident light beam. The method is readily implementable in available dynamic multiple-scattering computer codes, and, because of its versatility and computational efficiency, it can offer new opportunities for studying more complex time-varying photonic structures.
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任意形状的周期性时调制物体的光散射:扩展边界条件法
本文给出了计算具有周期性时变介电常数的任意形状均匀各向同性体的电磁散射跃迁矩阵T的扩展边界条件方法的一种适当推广。该方法在球形介电粒子的具体实例上的应用证实,当入射波频率与粒子光学共振的差值匹配调制频率的整数倍时,时间调制引起强的非弹性散射,并伴有散射体和光场之间的能量传递。此外,研究表明,对于非球面散射体,这些效应可以通过入射光束的偏振和传播方向等外部手段选择性地调谐。该方法易于在现有的动态多次散射计算机代码中实现,并且由于其通用性和计算效率,为研究更复杂的时变光子结构提供了新的机会。
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来源期刊
CiteScore
4.00
自引率
5.30%
发文量
374
审稿时长
2.1 months
期刊介绍: The Journal of the Optical Society of America B (JOSA B) is a general optics research journal that complements JOSA A. It emphasizes scientific research on the fundamentals of the interaction of light with matter such as quantum optics, nonlinear optics, and laser physics. Topics include: Advanced Instrumentation and Measurements Fiber Optics and Fiber Lasers Lasers and Other Light Sources from THz to XUV Light-Induced Phenomena Nonlinear and High Field Optics Optical Materials Optics Modes and Structured Light Optomechanics Metamaterials Nanomaterials Photonics and Semiconductor Optics Physical Optics Plasmonics Quantum Optics and Entanglement Quantum Key Distribution Spectroscopy and Atomic or Molecular Optics Superresolution and Advanced Imaging Surface Optics Ultrafast Optical Phenomena Wave Guiding and Optical Confinement JOSA B considers original research articles, feature issue contributions, invited reviews and tutorials, and comments on published articles.
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