自由空间耦合与光子纳米射流激发低语通道模的数值研究

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-05-10 DOI:10.1016/j.optlastec.2025.113050

Zhenmin Wang , Guoqiang Gu , Haonan Zhuo , Zejie Zheng , Peiqing Zhang , Shixun Dai , Shengchuang Bai , Duanduan Wu

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引用次数: 0

摘要

窃窃廊模式（WGMs）广泛应用于激光、传感和光子器件。将光耦合到微腔中以激发wgm是至关重要但具有挑战性的，特别是在自由空间耦合的情况下。这项工作证明了光子纳米射流（PNJs）与介电微谐振器的有效自由空间耦合的使用。PNJs在没有复杂透镜系统的受限空间中提供灵活性、稳定性和有效性。通过数值模拟研究了空间定位和环境折射率对wgm激发的影响。研究了当圆柱微腔靠近两层圆柱时，两层圆柱中产生的PNJ和WGMs共存的情况。透射谱和理论模型阐明了光场分布，为耦合效率提供了见解。产生pnj的微粒子与谐振wgm之间的相对距离和排列方式对耦合有显著影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Numerical study on the excitation of whispering gallery modes by free-space coupling with photonic nanojets

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Numerical study on the excitation of whispering gallery modes by free-space coupling with photonic nanojets

Whispering gallery modes (WGMs) are widely used in lasers, sensing, and photonic devices. Coupling light into micro-cavities to excite WGMs is crucial but challenging, especially with free-space coupling. This work demonstrates the use of photonic nanojets (PNJs) for efficient free-space coupling with dielectric micro-resonators. PNJs offer flexibility, stability, and effectiveness in confined spaces without complex lens systems. We investigated the impact of spatial positioning and the refractive index of the environment on the excitation of WGMs using numerical simulations. The coexistence of PNJ and WGMs generated in the two-layer cylinder is investigated when the cylindrical micro-cavity is placed close to the two-layer cylinder. The transmission spectrum and a theoretical model elucidate the optical field distribution, providing insights into the coupling efficiency. The relative distance and arrangement between the PNJ-generating micro-particles and the resonant WGMs significantly influence the coupling.

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems