单轴双各向异性介质中与波长无关的类布拉格反射

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.502652
Steven. Koufidis, Martin McCall
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引用次数: 0

摘要

我们最近表明,均匀双折射介质表现出一种圆形布拉格现象,这种现象完全依赖于介质参数的共振调谐,而不是特定波长的共振,从而使其电磁响应任意宽带。然而,共振条件需要一个等于平均折射率的手性参数。在这里,我们证明了非轴向波在轴向双各向异性单轴介质中的传播也会产生这样的响应,并且放宽了调谐条件的严重性,为控制共振的位置和相应的带宽提供了方便的平台。此外,还发现了奇点处的异常波传播,在奇点附近可以实现非常高的固有宽带折射率。最近对具有巨大可控制手性的元介质的研究为实现高效光调制器铺平了道路。
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Wavelength-Independent Bragg-like Reflection in Uniaxial Bi-Anisotropic Media
We have recently shown that a uniform birefringent medium exhibits a circular Bragg phenomenon that relies solely on resonant tuning of the medium’s parameters, rather than on a particular wavelength resonance, thus rendering its electromagnetic response arbitrarily broadband. The resonant condition, however, necessitated a chirality parameter equal to the average refractive index. Here, we demonstrate that non-axial wave propagation in an axially bi-anisotropic uniaxial medium also enacts such a response and, moreover, relaxes the severity of the tuning condition, offering a convenient platform for controlling both the location of the resonance and the corresponding bandwidth. Anomalous wave propagation at a singular point is additionally identified, in the vicinity of which a remarkably high and intrinsically broadband refractive index can be realized. Recent demonstrations of meta-media with giant and controllable chirality pave the path towards the realistic embodiment of a highly efficient optical modulator.
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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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