Ultra-broadband THz semiconductor laser based on heterogeneous quantum cascade gain medium

Author

Turcinkova, Dana ; Scalari, Giacomo ; Castellano, Fabrizio ; Amanti, Maria I. ; Beck, Mattias ; Faist, Jérôme

Author_Institution

Inst. of Quantum Electron., ETH Zurich, Zurich, Switzerland

fYear

2011

fDate

1-6 May 2011

Firstpage

1

Lastpage

2

Abstract

We report broadband laser emission from a quantum cascade laser based on heterogeneous gain medium. Gapless emission exceeding 1 THz bandwidth is reported around 2.66 THz (40% of the central frequency) from devices operating in double metal waveguides. Pulsed operating temperatures of 125 K with peak powers of 14 mW at 10 K are observed. CW operation is demonstrated and 1 THz bandwidth is observed above 80 K in pulsed mode. Time-resolved spectral analysis with 5 ns resolution revealing strong mode competition is also discussed.

Keywords

laser modes; optical pulse generation; quantum cascade lasers; spectral analysis; time resolved spectra; bandwidth 1 THz; broadband laser emission; double metal waveguides; heterogeneous quantum cascade gain medium; mode competition; power 14 mW; temperature 10 K; temperature 125 K; time 5 ns; time-resolved spectral analysis; ultrabroadband THz semiconductor laser; Bandwidth; Laser modes; Logic gates; Metals; Optical resonators; Photonics; Quantum cascade lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics (CLEO), 2011 Conference on

Conference_Location

Baltimore, MD

Print_ISBN

978-1-4577-1223-4

Type

conf

Filename

5950229