A tunable broadband microwave absorber based on coherent population trapping

被引：1

作者：

Yang, Aihong ^{[1
,2
]}

Liang, Min ^{[1
,2
]}

Jia, Zhengmao ^{[1
,2
]}

Liu, Shande ^{[1
,2
]}

Xu, Yan ^{[1
,2
,3
]}

Peng, Yandong ^{[1
,2
,4
,5
]}

机构：

[1] Shandong Univ Sci & Technol, Coll Elect Engn & Automat, Qingdao 266590, Peoples R China

[2] Shandong Univ Sci & Technol, Coll Elect & Informat Engn, Qingdao 266590, Peoples R China

[3] Natl Univ Singapore, Fac Sci, Ctr Quantum Technol, 2 Sci Dr 3, Singapore 117542, Singapore

[4] Ulm Univ, Inst Quantum Opt, Albert Einstein Allee, D-89081 Ulm, Germany

[5] Ulm Univ, IQST, Albert Einstein Allee, D-89081 Ulm, Germany

来源：

LASER PHYSICS | 2020年 / 30卷 / 09期

基金：

中国国家自然科学基金;

关键词：

microwave absorption; electromagnetically induced transparency; coherent population trapping; Rydberg atom; VAPOR CELL; RYDBERG; TRANSPARENCY; OPTICS;

D O I：

10.1088/1555-6611/ab9d74

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A scheme is proposed for a tunable broadband microwave absorber using a four-level Rydberg atom system with competition between electromagnetically induced transparency (EIT) and coherent population trapping (CPT). Two laser fields drive the Rydberg atoms from the ground state to a Rydberg state, forming a cascade-type EIT/CPT system. When a microwave (MW) field couples the Rydberg transition, a strong MW absorption peak appears. A narrow band MW absorber could be obtained via EIT, however, using CPT, the MW absorption spectrum can be significantly broadened and enhanced to have a bandwidth about ten times larger than that obtained with EIT and whose peak value can also be enhanced by a factor of ten, based on simulation.

引用

页数：5

共 49 条

[1]

[Anonymous], REP PROG PHYS

[2] Coherent population trapping in laser spectroscopy [J].