Broadband monolithic extractor for metal-metal waveguide based terahertz quantum cascade laser frequency combs

被引：9
|
作者：
Rosch, Markus [1 ]
Benea-Chelmus, Ileana-Cristina [1 ]
Bonzon, Christopher [1 ]
Suess, Martin J. [1 ]
Beck, Mattias [1 ]
Faist, Jerome [1 ]
Scalari, Giacomo [1 ]
机构：
[1] Swiss Fed Inst Technol, Inst Quantum Elect, Auguste Piccard Hof 1, CH-8093 Zurich, Switzerland
来源：
APPLIED PHYSICS LETTERS | 2017年 / 111卷 / 02期
基金：
瑞士国家科学基金会;
关键词：
PHOTONIC-CRYSTAL; PULSE GENERATION; PHASE-CONTROL; BEAM; THZ; POWER;
D O I：
10.1063/1.4993786
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present a monolithic solution to extract efficiently light from terahertz quantum cascade lasers with metal-metal waveguides suitable for broadband frequency comb applications. The design is optimized for a bandwidth of 400 GHz around a center frequency of 2.5 THz. A five-fold increase in total output power is observed compared to standard metal-metal waveguides. The extractor features a single-lobed far-field pattern and increases the frequency comb dynamical range to cover more than 50% of the laser dynamic range. Frequency comb operation up to a spectral bandwidth of 670 GHz is achieved. Published by AIP Publishing.
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页数：4
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