光学
栅栏
透射率
材料科学
导模共振
电介质
全息光栅
波长
衍射光栅
闪耀光栅
共振(粒子物理)
光电子学
物理
粒子物理学
作者
Shisuo Du,Zhiyuan Che,M. G. Zhao,Wenzhe Liu,Lei Shi
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-03-22
卷期号:48 (7): 1710-1710
被引量:1
摘要
Achieving Goos-Hänchen shift enhancement with high transmittance or reflectance based on the resonance effect is challenging due to the drop in the resonance region. This Letter demonstrates the realization of large transmitted Goos-Hänchen shifts with high (near 100%) transmittance based on a coupled double-layer grating system. The double-layer grating is composed of two parallel and misaligned subwavelength dielectric gratings. By changing the distance and the relative dislocation between the two dielectric gratings, the coupling of the double-layer grating can be flexibly tuned. The transmittance of the double-layer grating can be close to 1 in the entire resonance angle region, and the gradient of the transmissive phase is also preserved. The Goos-Hänchen shift of the double-layer grating reaches ∼30 times the wavelength, approaching 1.3 times the radius of the beam waist, which can be observed directly.
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