摘要
基于相变材料的硅基光开关为传统光开关技术所面临的能耗高和体积大等问题提供了解决途径。然而传统光学相变材料的高吸收特性对光开关阵列的集成规模带来了一定的限制。In_(2)Se_(3)材料凭借其近红外透明、可在单晶态间进行可逆相变且低结构熵的特性,有望为高速、稳定和低功耗的光开关技术带来突破。本文提出了一种基于In_(2)Se_(3)及硅波导的非易失性光开关,该器件由硅波导及Si-In_(2)Se_(3)异质集成波导构成的定向耦合器结构组成。借助α-In_(2)Se_(3)与β-In_(2)Se_(3)之间非易失性相变特性,可实现定向耦合器的交叉与直通端口的输出切换,进而实现无需持续供电的波导型光开关器件。仿真结果表明,在1550 nm处,该光开关可实现交叉及直通端口输出插入损耗小于0.86 dB,通道间串扰优于−20.39 dB。上述结构有望为光通信、光信息处理等领域的技术发展提供一些启发。
Silicon photonic switches that use phase change materials offer solutions to the high power consumption and large size challenges faced by traditional optical switch technologies.However,the high absorption properties of conventional optical phase change materials impose limitations on the integration scale of optical switch arrays.Due to its reversible phase transitions between single-crystal states and low structural entropy,In_(2)Se_(3) is promising for advancing highspeed,stable,and low-power optical switch technology.This study presents a non-volatile photonic switch based on In_(2)Se_(3) and silicon waveguides that is composed of a directional coupler structure formed by multiple silicon waveguides and a single heterogeneously integrated Si-In_(2)Se_(3) waveguide.Utilizing the non-volatile phase transition characteristics betweenα-In_(2)Se_(3) andβ-In_(2)Se_(3),the device can switch the output between the cross and bar ports of the directional coupler,thus enabling a waveguide-type switch that does not require continuous power supply.Simulation results show that at 1550 nm,the optical switch achieves insertion losses of less than 0.86 dB at both the cross and bar ports,with a channel crosstalk of more than−20.39 dB.The proposed structure is expected to inspire technological developments in fields such as optical communications and photonic information processing.
作者
李田甜
李艺杰
白子涵
刘玉萌
韩冬冬
惠战强
杜慧敏
Li Tiantian;Li Yijie;Bai Zihan;Liu Yumeng;Han Dongdong;Hui Zhanqiang;Du Huimin(School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,Shaanxi,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2024年第19期222-232,共11页
Laser & Optoelectronics Progress
基金
国家重点研发计划(2022YFB2903201)
国家自然科学基金(62105260)
陕西省科协青年人才托举计划(20220135)
陕西省自然科学基础研究计划(2022JQ-638)
西安市科协青年人才托举计划(095920221308)。
关键词
硅基光电子
光开关
相变材料
定向耦合器
silicon photonics
optical switch
phase change material
directional coupler
