Beam patterns of terahertz quantum cascade lasers with subwavelength cavity dimensions

被引：97
作者：
Adam, AJL
Kasalynas, I
Hovenier, JN
Klaassen, TO
Gao, JR
Orlova, EE
Williams, BS
Kumar, S
Hu, Q
Reno, JL
机构：
[1] Delft Univ Technol, Fac Sci Appl, Kavli Inst NanoSci Delft, NL-2628 CJ Delft, Netherlands
[2] Russian Acad Sci, Inst Phys & Microstruct, Nizhnii Novgorod 603950, Russia
[3] MIT, Dept Elect Engn & Comp Sci, Res Lab Elect, Cambridge, MA 02139 USA
[4] Sandia Natl Labs, Albuquerque, NM 87185 USA
来源：
APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 15期
基金：
美国国家航空航天局; 美国国家科学基金会;
关键词：
D O I：
10.1063/1.2194889
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The need to reach single-mode lasing and minimize at the same time the electrical dissipation of cryogenically operated terahertz quantum cascade lasers may result in small and subwavelength cavity dimensions. To assess the influence of such dimensions on the shape of the laser emission, we have measured the beam pattern of two metal-metal cavity quantum cascade lasers. The patterns show regular angular intensity variations which depend on the length of the laser cavity. The physical origin of these features is discussed in terms of interference of the coherent radiation emitted by end and side facets of the laser bar.
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页数：3
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