Weixi Liu, Jiahao Wu, Boyu Pu, Jintao Song, Chengfeng Wen, Lijia Song, Huan Li, Daoxin Dai, Yaocheng Shi
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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.
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.