物理学报2024，Vol.73Issue(16)：58-65,8.DOI:10.7498/aps.73.20240184
纳米光纤-半导体量子点分子耦合系统中光孤子的存储与读取
Storage and retrieval of optical solitons in nanofiber-semiconductor quantum dot molecule coupling systems
摘要
Abstract
The best carrier for quantum information transmission is light signal,which has a fast propagation speed and can carry a large amount of information.However,during the propagation of light,dispersion effect and diffraction effect can cause quantum information to be distorted to a certain extent.On the contrary,optical solitons are formed due to the balance between the system's dispersion(diffraction)effect and nonlinear effect,and they exhibit very high stability and fidelity.Therefore,they have received widespread attention in electromagnetically induced transparency(EIT)media with ultracold atoms.However,cold atomic gas media require extremely low operating temperatures,and the performances of the materials are difficult to control precisely.These factors are unfavorable for the miniaturization and integration of future information devices,thus significantly limiting their practical applications.Semiconductor quantum dot media,on the other hand,possess advantages such as discrete energy level structures and spectral properties similar to those of cold atomic gases,longer decoherence times,larger electric dipole moments,more significant nonlinear optical effects,and easy integration,making them an ideal alternative to cold atomic media.In this work,semiconductor quantum dots are coupled with optical fibers,the most common carrier in optical communication,to explore the formation,storage,and retrieval of temporal optical solitons in the coupled system.The results show that due to the tunneling-induced transparency effect between dots in semiconductor quantum dot molecules,light absorption in the system is greatly suppressed.At the same time,the transverse confinement of the nanofiber can enhance the interaction between light and the system,and the enhanced nonlinear response of the system can balance the dispersion effect,resulting in stable temporal optical solitons.Further research indicates that by turning on and off the inter-dot tunneling coupling,the high-efficiency and high-fidelity storage and retrieval of optical solitons can be realized in the system.These findings have certain guiding significance and potential application value for the processing all-optical information in solid quantum materials.关键词
隧穿诱导透明/光孤子的存储和读取/量子点/纳米光纤Key words
tunneling induced transparency/the storage and retrieval of the optical solitons/semiconductor quantum dot/nanofiber引用本文复制引用
曾莹,佘彦超,张蔚曦,杨红..纳米光纤-半导体量子点分子耦合系统中光孤子的存储与读取[J].物理学报,2024,73(16):58-65,8.基金项目
国家自然科学基金(批准号:12165016)、贵州省科技厅基础研究项目(批准号:ZK[2023]049,ZK[2021]034,ZK[2021]021,ZK[2022]558)和铜仁市科技局科学技术基金(批准号:[2023]41)资助的课题. Project supported by the National Natural Science Foundation of China(Grants No.12165016),the NSF of Guizhou Province Education Department(Grant Nos.ZK[2023]049,ZK[2021]034,ZK[2021]021,ZK[2022]558),and the NSF of Tongren Science and Technology Bureau,China(Grants No.[2023]41). （批准号:12165016）
