作者单位
摘要
1 清华大学 电子工程系,量子信息前沿科学中心,北京市未来芯片技术高精尖创新中心,北京信息科学与技术国家研究中心,北京 100084
2 奥地利半导体实验室,A 9524 Villach,Austria
3 北京量子信息科学研究院,北京 100193
硫化物玻璃是发展非线性集成光学器件的良好材料,特殊的理化特性使得硫化物玻璃集成光学波导的制备成为研究的难点。对硫化物玻璃波导的制备工艺进行了综述,重点介绍利用硫化物玻璃在熔融状态下流动性好的特点,采用热熔融自回流方法制备硫化物玻璃波导的工艺。该方法避免了对硫化物玻璃薄膜完整性的破坏,以及光刻胶显影液对硫化物玻璃材料的腐蚀作用,可以得到高质量的具有小模场面积的倒脊型硫化物玻璃波导。实验测试表明,采用热熔融自回流方法制备的硫化物玻璃波导具有良好的三阶非线性光学特性和受激布里渊散射特性。最后,展望了采用该方法发展硫化物玻璃非线性集成光学器件及其片上系统的研究方向和前景。
硫化物玻璃 非线性光学器件 集成光学波导 三阶光学非线性 受激布里渊散射 Chalcogenide glass Nonlinear photonic device Integrated optical waveguide The third order nonlinearity Stimulated Brillouin scattering 
光子学报
2022, 51(5): 0551303
Author Affiliations
Abstract
1 Beijing National Research Center for Information Science and Technology (BNRist), Beijing Innovation Center for Future Chips, Electronic Engineering Department, Tsinghua University, Beijing 100084, China
2 Frontier Science Center for Quantum Information, Beijing 100084, China
3 Beijing Academy of Quantum Information Sciences, Beijing 100193, China
An optomechanical crystal cavity with nonsuspended structure using As2S3 material is proposed. The principle of mode confinement in the nonsuspended cavity is analyzed, and two different types of optical and acoustic defect modes are calculated through appropriate design of the cavity structure. An optomechanical coupling rate of 82.3 kHz is obtained in the proposed cavity, and the designed acoustic frequency is 3.44 GHz. The acoustic mode coupling between two nonsuspended optomechanical crystal cavities is also demonstrated, showing that the proposed cavity structure has great potential for realizing further optomechanical applications in multicavity systems.
Photonics Research
2021, 9(5): 05000893
Author Affiliations
Abstract
1 Beijing National Research Center for Information Science and Technology (BNRist), Beijing Innovation Center for Future Chips, Electronic Engineering Department, Tsinghua University, Beijing 100084, China
2 Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
3 Frontier Science Center for Quantum Information, Beijing 100084, China
4 Beijing Academy of Quantum Information Sciences, Beijing 100193, China
We propose a hybrid silicon waveguide scheme to avoid the impact of noise photons induced by pump lights in application scenarios of quantum photonic circuits with quantum light sources. The scheme is composed of strip waveguide and shallow-ridge waveguide structures. It utilizes the difference of biphoton spectra generated by spontaneous four-wave mixing (SFWM) in these two waveguides. By proper pumping setting and signal/idler wavelength selection, the generation of desired photon pairs is confined in the strip waveguide. The impact of noise photons generated by SFWM in the shallow-ridge waveguide can be avoided. Hence, the shallow-ridge waveguide could be used to realize various linear operation devices for pump light and quantum state manipulations. The feasibility of this scheme is verified by theoretical analysis and a primary experiment. Two applications are proposed and analyzed, showing its great potential in silicon-based quantum photonic circuits.
Photonics Research
2020, 8(3): 03000235

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