非磁性连续准约束太赫兹非互易器件

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2024-11-13 DOI:10.1016/j.optcom.2024.131310

Ya-Li Liu, Jiu-sheng Li

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引用次数: 0

摘要

太赫兹隔离器打破了洛伦兹互易性，是一种典型的非互易单向传输设备，是太赫兹系统中不可或缺的重要组件。由于目前的非互易材料会损失太赫兹辐射，因此太赫兹非互易器件仍然是一个重大挑战。通过将三阶非线性与器件结构的平面外不对称和平面内断裂相结合，提出了一种非线性硅光栅元表面太赫兹隔离器。通过控制连续介质的准约束态辐射线宽，所设计的硅光栅元表面结构在 0.5 MW/cm2 太赫兹强度下的隔离度为 12.08 dB，插入损耗为 4.7 dB。该器件为设计太赫兹非互易器件提供了一种新的解决方案，在太赫兹集成系统中具有广阔的应用前景。

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Non-magnetic continuum quasi bound terahertz non-reciprocal device

The terahertz isolator breaks the Lorentz reciprocity and is a typical non-reciprocal unidirectional transmission device, which is an indispensable and important component in terahertz systems. Due to the loss of terahertz radiation in current non-reciprocal materials, terahertz non-reciprocal devices remain a significant challenge. By combining third-order nonlinearity with the out of plane asymmetry and in-plane breaking of device structures, a nonlinear silicon grating metasurface terahertz isolator is proposed. By controlling the quasi-bound state radiation linewidth of the continuum medium, the designed silicon grating metasurface structure has an isolation of 12.08 dB and an insertion loss of 4.7 dB under terahertz intensity of 0.5 MW/cm². This device provides a new solution for the design of terahertz non-reciprocal devices and has great application prospects in terahertz integrated systems.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.