基于薄膜铌酸锂的各向异性工程超宽带抗BIC偏振器

IF 10 1区 物理与天体物理 Q1 OPTICS
Weixi Liu, Jiahao Wu, Boyu Pu, Jintao Song, Chengfeng Wen, Lijia Song, Huan Li, Daoxin Dai, Yaocheng Shi
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引用次数: 0

摘要

薄膜铌酸锂(TFLN)由于其出色的电光效率、强非线性和低损耗而成为光子集成电路的革命性平台。然而,在TFLN PIC中,极化串扰仍然是一个关键的挑战。传统的偏振器不能同时实现低插入损耗(<0.5 dB)和大工作带宽(>300 nm)。在这项工作中,提出并演示了一种在各向异性TFLN平台中操纵TM结合模式和TE连续模式之间耦合的波导定向工程策略。通过将特殊光轴对准平行于波导方向,实现了连续介质中具有增强反束缚态的超宽带偏振器。该器件在1.24 ~ 1.7µm波长范围内的插入损耗低于0.18 dB,消光比超过17 dB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Anisotropy‐Engineered Ultrabroadband Anti‐BIC Polarizer Based on Thin‐Film Lithium Niobate
Thin‐film lithium niobate (TFLN) has emerged as a revolutionary platform for photonic integrated circuits due to its outstanding electro‐optic efficiency, strong nonlinearity, and low loss. However, polarization crosstalk in TFLN PIC remains a critical challenge. Conventional polarizers cannot simultaneously achieve both low insertion loss (<0.5 dB) and large operational bandwidth (>300 nm). In this work, a waveguide orientation‐engineering strategy that manipulates the coupling between TM bound mode and TE continuous modes in the anisotropic TFLN platform is proposed and demonstrated. By aligning the extraordinary optical axis parallel to the waveguide direction, an ultrabroadband polarizer with enhanced anti bound state in the continuum has been achieved. The device achieves an insertion loss below 0.18 dB and an extinction ratio exceeding 17 dB across 1.24–1.7 µm wavelength range.
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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
期刊介绍: Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.
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