Electro-optic tuning in composite silicon photonics based on ferroionic 2D materials  

作　　者：Ghada Dushaq Solomon Serunjogi Srinivasa R.Tamalampudi Mahmoud Rasras 

机构地区：[1]Department of Electrical and Computer Engineering,New York University Abu Dhabi,P.O.Box 129188,Abu Dhabi,United Arab Emirates [2]NYU Tandon School of Engineering,New York University,New York,NY,USA

出　　处：《Light(Science & Applications)》2024年第5期852-864,共13页光（科学与应用)（英文版）

摘　　要：Tunable optical materials are indispensable elements in modern optoelectronics,especially in integrated photonics circuits where precise control over the effective refractive index is essential for diverse applications.Two-dimensional materials like transition metal dichalcogenides(TMDs)and graphene exhibit remarkable optical responses to external stimuli.However,achieving distinctive modulation across short-wave infrared(SWIR)regions while enabling precise phase control at low signal loss within a compact footprint remains an ongoing challenge.In this work,we unveil the robust electro-refractive response of multilayer ferroionic two-dimensional CuCrP2S6(CCPS)in the near-infrared wavelength range.By integrating CCPS into silicon photonics(SiPh)microring resonators(MRR),we enhance lightmatter interaction and measurement sensitivity to minute phase and absorption variations.Results show that electrically driven Cu ions can tune the effective refractive index on the order of 2.8×10−3 RIU(refractive index unit)while preserving extinction ratios and resonance linewidth.Notably,these devices exhibit low optical losses and excellent modulation efficiency of 0.25 V.cm with a consistent blue shift in the resonance wavelengths among all devices for either polarity of the applied voltage.These results outperform earlier findings on phase shifters based on TMDs.Furthermore,our study demonstrates distinct variations in electro-optic tuning sensitivity when comparing transverse electric(TE)and transverse magnetic(TM)modes,revealing a polarization-dependent response that paves the way for diverse applications in light manipulation.The combined optoelectronic and ionotronic capabilities of two-terminal CCPS devices present extensive opportunities across several domains.Their potential applications range from phased arrays and optical switching to their use in environmental sensing and metrology,optical imaging systems,and neuromorphic systems in light-sensitive artificial synapses.

关 键 词：tuning POLARIZATION refractive 

分 类 号：TB33[一般工业技术—材料科学与工程]