Integrated terahertz pulse generation and amplification in quantum cascade lasers

被引：17

作者：

Dhillon, S. S. ^{[1
]}

Sawallich, S. ^{[1
]}

Jukam, N. ^{[1
]}

Oustinov, D. ^{[1
]}

Madeo, J. ^{[1
]}

Barbieri, S. ^{[2
]}

Filloux, P. ^{[2
]}

Sirtori, C. ^{[2
]}

Marcadet, X. ^{[3
]}

Tignon, J. ^{[1
]}

机构：

[1] Univ Paris 06, CNRS, Ecole Normale Super, Lab Pierre Aigrain,UMR 8551, F-75231 Paris 05, France

[2] Univ Paris 07, CNRS, UMR Mat & Phenomenes Quant 7162, F-75251 Paris, France

[3] Alcatel Thales III V Lab, F-91767 Palaiseau, France

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 06期

关键词：

optical pulse generation; quantum cascade lasers; sapphire; titanium; SUBMILLIMETER-WAVE EMISSION; GAIN MEASUREMENTS; SUPERLATTICES; SPECTROSCOPY; OSCILLATIONS;

D O I：

10.1063/1.3306733

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Integrated terahertz (THz) pulse generation and amplification in a THz quantum cascade laser (QCL) is demonstrated. Intracavity THz pulses are generated by exciting the facet of the QCL with an ultrafast Ti:Sapphire laser (similar to 100 fs) and detected using electro-optic sampling. Maximum THz field emission is found with an interband transition of 1.535 eV (809 nm) and by narrowing the excitation laser bandwidth to similar to 3 THz. These resonance conditions correspond to the narrowband excitation of the quantum cascade miniband, indicating that the THz pulse is generated by the photoexcited carriers that are accelerated by the applied field. The generated pulse is subsequently amplified by the narrowband gain of the laser as it propagates through the QCL cavity.

引用

页数：3

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