Title :
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
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;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2011 Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1223-4
