Widely tunable compact terahertz gas lasers

被引：74

作者：

Chevalier, Paul ^{[1
]}

Amirzhan, Arman ^{[1
]}

Wang, Fan ^{[2
]}

Piccardo, Marco ^{[1
]}

Johnson, Steven G. ^{[3
,4
]}

Capasso, Federico ^{[1
]}

Everitt, Henry O. ^{[5
,6
]}

机构：

[1] Harvard Univ, Harvard John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[3] MIT, Dept Math, Cambridge, MA 02139 USA

[4] MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[5] US Army, Combat Capabil Dev Command Aviat & Missile Ctr, Redstone Arsenal, AL 35898 USA

[6] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

SCIENCE | 2019年 / 366卷 / 6467期

基金：

美国国家科学基金会;

关键词：

ENERGY-TRANSFER;

D O I：

10.1126/science.aay8683

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The terahertz region of the electromagnetic spectrum has been the least utilized owing to inadequacies of available sources. We introduce a compact, widely frequency-tunable, extremely bright source of terahertz radiation: a gas-phase molecular laser based on rotational population inversions optically pumped by a quantum cascade laser. By identifying the essential parameters that determine the suitability of a molecule for a terahertz laser, almost any rotational transition of almost any molecular gas can be made to lase. Nitrous oxide is used to illustrate the broad tunability over 37 lines spanning 0.251 to 0.955 terahertz, each with kilohertz linewidths. Our analysis shows that laser lines spanning more than 1 terahertz with powers greater than 1 milliwatt are possible from many molecular gases pumped by quantum cascade lasers.

引用

页码：856 / +

页数：19

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