Peng Zhongdi, Krishna Rakesh, Wu Xi, Hosseinnia Amir H, Fan Tianren, Adibi Ali
Opt Lett. 2025 Aug 15;50(16):4886-4889. doi: 10.1364/OL.565076.
Photonic crystal resonators (PhCRs) have been widely used in nonlinear integrated photonics for frequency engineering applications. A microwave-assisted frequency converter based on PhCRs provides precisely controlled bidirectional frequency conversion. Using a hybrid silicon nitride-on-lithium niobate-on-insulator platform, we demonstrate a high-quality PhCR for the first time, to the best of our knowledge, for voltage-driven flexible frequency conversion using the electro-optic effect (0.85 pm/V) without etching lithium niobate. The fabricated PhCR has a large supermode splitting bandwidth of 14.6 GHz and an intrinsic quality factor of 1.47 × 10. Using different periodic corrugation amplitudes in the fabricated PhCRs enables the precise control of mode-splitting bandwidth with a 93.5-MHz/nm bandwidth-to-amplitude ratio.
光子晶体谐振器（PhCRs）已广泛应用于非线性集成光子学中的频率工程应用。基于PhCRs的微波辅助频率转换器可提供精确控制的双向频率转换。据我们所知，利用混合氮化硅-铌酸锂-绝缘体平台，我们首次展示了一种高质量的PhCR，用于利用电光效应（0.85 pm/V）进行电压驱动的灵活频率转换，而无需蚀刻铌酸锂。所制备的PhCR具有14.6 GHz的大超模分裂带宽和1.47×10的本征品质因数。在制备的PhCR中使用不同的周期性波纹幅度，能够以93.5-MHz/nm的带宽与幅度比精确控制模式分裂带宽。
