Utilizing quantum coherence in Cs Rydberg atoms for high-sensitivity room-temperature terahertz detection: a theoretical exploration  

作　　者：LEI HOU JUNNAN WANG QIHUI HE SUGUO CHEN LEI YANG SUNCHAO HUANG WEI SHI 

机构地区：[1]Department of Physics,Xi’an University of Technology,Xi’an 710048,China [2]School of Electrical Engineering,Xi’an University of Technology,Xi’an 710048,China [3]School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 610101,Singapore

出　　处：《Photonics Research》2024年第7期1583-1592,共10页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(62075179);Shaanxi Fundamental Science Research Project for Mathematics and Physics (23JSZ005);Natural Science Foundation of Shaanxi Provincial Department of Education(22JS026, 22JS027)。

摘　　要：In recent years,terahertz (THz) technology has made significant progress in numerous applications;however,the highly sensitive,room-temperature THz detectors are still rare,which is one of the bottlenecks in THz research.In this paper,we proposed a room-temperature electrometry method for THz detection by laser spectroscopy of cesium(^(133)Cs) Rydberg atoms,and conducted a comprehensive investigation of the five-level system involving electromagnetically induced transparency (EIT),electromagnetically induced absorption (EIA),and Autler–Townes (AT) splitting in^(133)Cs cascades.By solving the Lindblad master equation,we found that the influence of the THz electric field,probe laser,dressing laser,and Rydberg laser on the ground state atomic population as well as the coherence between the ground state and the Rydberg state,plays a crucial role in the transformation and amplitude of the EIT and EIA signals.Temperature and the atomic vapor cell’s dimensions affect the number of^(133)Cs atoms involved in the detection,and ultimately determine the sensitivity.We predicted the proposed quantum coherence THz detection method has a remarkable sensitivity of as low as 10^(-9)V m^(-1)Hz^(-1/2).This research offers a valuable theoretical basis for implementing and optimizing quantum coherence effects based on Rydberg atoms for THz wave detection with high sensitivity and room-temperature operation.

关 键 词：quantum RYDBERG dimensions 

分 类 号：O441.4[理学—电磁学]