Double fano resonances in nano-modulated thin films for frequency and angular filtering

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-07-24 DOI:10.1016/j.optlastec.2025.113617

Lucciano A. Letelier , Julianija Nikitina , Lina Grineviciute , Kestutis Staliunas

引用次数: 0

Abstract

Fano resonances in sub-wavelength scale periodically modulated thin films are known to provide narrow transmission bandgaps in the wavelength- and in the incidence angle domains. Here, we demonstrate that the interplay of two nearby Fano resonances can provide extremely narrow frequency (or wavelength) high-pass bands in transmission, much narrower than the Fano resonances themselves. We fabricate such high-pass frequency filters and measure their transmission characteristics. Moreover, by combining two identical structures tilted at some angles, one with respect to another, we show a tunable high-pass window in the angle-wavelength domain. This tunable high-pass window is formed by four Fano resonance lines from two nanostructured samples.

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用于频率和角滤波的纳米调制薄膜中的双范诺共振

亚波长尺度周期性调制薄膜中的范诺共振在波长和入射角域中提供窄的传输带隙。在这里，我们证明了两个附近的法诺共振的相互作用可以在传输中提供极窄的频率（或波长）高通带，比法诺共振本身窄得多。我们制作了这种高通频率滤波器并测量了其传输特性。此外，通过结合两个相同的结构倾斜在某些角度，一个相对于另一个，我们显示了一个可调谐的高通窗口在角波长域。这个可调谐的高通窗口由来自两个纳米结构样品的四条范诺共振线组成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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