Polarization phase modulator based on two-dimensional germanium selenide and design method of modulator

A phase modulation and design method technology, applied in the direction of polarization components, instruments, optical components, etc., can solve the problems of miniaturization of unfavorable polarization phase modulation devices, achieve efficient and fast identification and detection, simple and clear derivation process, accurate and efficient measurement Effect
CN112764133AActive Publication Date: 2021-05-07HUAZHONG UNIV OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2021-05-07

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Abstract

The invention belongs to the field of novel polarization optical devices, and particularly relates to a polarization phase modulator based on two-dimensional germanium selenide and a design method of the modulator. The design method comprises the following steps of: firstly, manufacturing a plurality of two-dimensional GeSe with different thicknesses, attaching the two-dimensional GeSe to a substrate, acquiring in-plane optical constants of the two-dimensional GeSe, calculating phase retardations corresponding to different thicknesses by combining a phase retardation calculation formula, calculating the phase retardations according to the requirements of a target polarization phase modulator on the phase retardations, determining the thickness of the two-dimensional GeSe in the target polarization phase modulator, and finally checking whether the manufactured polarization phase modulator meets the requirement or not through comparison of experimental measurement and calculation fitting. According to the method, the thickness nanocrystallization of the polarization phase modulator can be realized only through simple design, and the method has a very good application prospect.
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Description

technical field

[0001] The invention belongs to the field of novel polarization optical devices, and more specifically relates to a two-dimensional germanium selenide (GeSe)-based polarization phase modulation device and a design method thereof. Background technique

[0002] Traditional optical instruments (such as ellipsometers, etc.) are limited by the size of the instrument, and cannot meet the requirements of in-situ detection of living life and in-situ in-depth detection of large precision instruments, which require small size and have the same or even better functional requirements. Although polarization phase modulation devices made of metasurfaces and metamaterials can also achieve large birefringence effects, their high preparation costs and optical losses make it still a long way to go in practical applications (Nature Photonics, 2018, 12(7): 392 .).

[0003] Nano-optical instruments constructed of two-dimensional materials not only have the advantages of small si...

Claims

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