发表机构
Graduate School of Engineering Science, The University of Osaka; Center for Quantum Information and Quantum Biology, The University of Osaka; Graduate School of Engineering, Kochi University of Technology; Experimental Quantum Information Physics Unit, Okinawa Institute of Science and Technology Graduate University（大阪大学工学研究科; 大阪大学量子信息与量子生物学中心; 高知工科大学工学研究科; 冲绳科学技术大学院大学实验量子信息物理单元）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究基于周期性极化铌酸锂波导谐振器中的频率转换实现全光可控的相干完美吸收，利用泵浦驱动频率转换创建可调有效损耗通道，实现高达92%的吸收，还引入环境辅助CPA，建立了基于频率转换的全光控制平台。
AI 中文摘要
相干完美吸收（CPA）通过干涉和耗散消除光场，但传统实现依赖制造后基本固定的材料损耗。本文展示了基于周期性极化铌酸锂波导谐振器中频率转换的全光可控CPA。泵浦驱动的频率转换将主系统中1581nm的共振信号场耦合到780nm的非共振环境模式，创建动态可调的有效损耗通道。非线性腔充当无固有材料吸收的可调有损分束器。在相干双边信号注入下，观察到高达92%的吸收。我们还通过向频率转换后的环境模式注入外部场引入环境辅助CPA，将环境从被动损耗库转变为可寻址的相干控制端口。我们的结果建立了一个基于频率转换的平台，用于CPA中耗散的全光控制，将泵浦可调损耗与环境辅助相干控制相结合。
英文摘要
Coherent perfect absorption (CPA) extinguishes optical fields through interference and dissipation, but conventional implementations rely on material loss that is largely fixed after fabrication. Here we demonstrate all-optically controllable CPA based on frequency conversion in a periodically poled lithium niobate waveguide resonator. Pump-driven frequency conversion couples a resonant signal field at 1581 nm in the main system to a non-resonant environmental mode at 780 nm, creating a dynamically tunable effective loss channel. The nonlinear cavity acts as a tunable lossy beamsplitter without intrinsic material absorption. Under coherent two-sided signal injection, we observe up to 92 % absorption. We further introduce environment-assisted CPA by injecting an external field into the frequency-converted environmental mode, turning the environment from a passive loss reservoir into an addressable coherent control port. Our results establish a frequency-conversion-based platform for all-optical control of dissipation in CPA, combining pump-tunable loss with environment-assisted coherent control.
Comments8 pages, 7 figures
