红外与毫米波学报2026，Vol.45Issue(2)：291-298,8.DOI:10.11972/j.issn.1001-9014.2026.02.013
连续波工作的耦合双光栅太赫兹量子级联线激光器
Continuous wave operation of terahertz quantum cascade wire lasers with dual coupled gratings
摘要
Abstract
We demonstrate terahertz quantum cascade(THz-QC)wire lasers based on dual coupled gratings that achieve continuous-wave(CW)operation near liquid nitrogen temperatures with a low-divergence Gaussian-like beam profile.Our configuration circumvents the effective refractive index constraint,significantly enhancing fab-rication efficiency while retaining the key advantages of low power consumption and high heat dissipation efficien-cy.By engineering the photonic band structure of the coupled gratings,the laser operates on two supermodes.For Supermode#1,grating 1 serves as the master oscillator while grating 2 functions as a phased antenna array,featuring a collimated beam.For Supermode#2,grating 2 is the main oscillator and simultaneously provides a collimated beam,while grating 1 offers high reflectivity.Both supermodes exhibit high cavity quality factors and low beam divergence,achieved with a significantly reduced gain area.Experimentally,both supermodes are ob-served,and the optimized laser produces a collimated Gaussian beam with divergence angles of 12°×18° and an optical power of 1.04 mW.The threshold power consumption and thermal resistance are as low as 2.62 W and 8.5 mK/W/cm²,respectively,resulting in a maximum CW operating temperature of 78.0 K.This work offers a more accessible route for low-divergence,low-power-consumption,high-thermal-dissipation-efficiency THz-QCLs with enhanced CW operation at elevated temperatures.关键词
太赫兹/量子级联激光器/光栅/连续模式Key words
terahertz/quantum cascade laser/grating/continuous-wave mode分类
数理科学引用本文复制引用
谭诚,房玉龙,徐刚毅,邹婷婷,臧善志,王凯,甘良华,曹晨涛,陈炳奇,陈宏泰,张月蘅..连续波工作的耦合双光栅太赫兹量子级联线激光器[J].红外与毫米波学报,2026,45(2):291-298,8.基金项目
Supported by the National Natural Science Foundation of China(12393833,62235010,62435020,12274285) （12393833,62235010,62435020,12274285）
