High-order Autler–Townes splitting in electrically tunable photonic molecules  

作　　者：YIHAO CHEN JUNTAO DUAN JIN LI YAN CHEN JIEWEN LI JIANAN DUAN XIAOCHUAN XU JIAWEI WANG 

机构地区：[1]School of Integrated Circuit,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China [2]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China [3]National Key Laboratory of Laser Spatial Information,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China

出　　处：《Photonics Research》2024年第8期1794-1801,共8页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(62105080,U22A2093);Basic and Applied Basic Research Foundation of Guangdong Province(2023A1515011944,2021A1515110076,2020B1515130006,2021B515120056);Talent Recruitment Project of Guangdong(2021QN02X179);Science,Technology and Innovation Commission of Shenzhen Municipality(JCYJ20220531095604009,RCYX20221008092907027,RCBS20210609103824050)。

摘　　要：Whispering gallery mode optical microresonators represent a promising avenue for realizing optical analogs of coherent light–atom interactions,circumventing experimental complexities.All-optical analogs of Autler–Townes splitting have been widely demonstrated,harnessing coupled optical microresonators,also known as photonic molecules,wherein the strong coupling between resonant fields enables energy level splitting.Here,we report the characterizations of Autler–Townes splitting in waveguide-coupled microring dimers featuring mismatched sizes.By exploiting backscattering-induced coupling via Rayleigh and Mie scatterers in individual rings,high-order Autler–Townes splitting has been realized,yielding supermode hybridization in a multi-level system.Upon resonance detuning using an integrated phase shifter,intra-cavity coupling-induced splitting becomes almost indistinguishable at the zero-detuning point where the strong inter-cavity coupling counteracts the imbalance of backscattering strengths in individual rings.Through demonstrations on the maturing silicon photonics platform,our findings establish a framework of electrically tunable photonic molecules for coupling-mediated Autler–Townes splitting,offering promising prospects for on-chip signal generation and processing across classical and quantum regimes.

关 键 词：TUNABLE tuning WAVEGUIDE 

分 类 号：TN256[电子电信—物理电子学]