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Broadband semiconductor terahertz laser based on heterogeneous cascades

Abstract:

We present a development of a broad gain heterogeneous quantum cascade laser for terahertz frequencies. By placing appropriate different active-regions based on a four-quantum-well design into a double-metal waveguide we obtained laser emitting gapless over a bandwidth of 1 THz, between 3.2 to 2.2 THz. This means that this single-device source covers an emission range of nearly 40 % around the center frequency. In pulsed mode operation, our devices show threshold current density as low as 285...

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Publisher copy:
10.1117/12.874600

Authors


Turčinková, D More by this author
Scalari, G More by this author
Amanti, MI More by this author
Castellano, F More by this author
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Journal:
Proceedings of SPIE - The International Society for Optical Engineering
Volume:
7953
Publication date:
2011
DOI:
ISSN:
0277-786X
URN:
uuid:97d756b9-eae7-493d-aa84-b4f88b586ed7
Source identifiers:
191323
Local pid:
pubs:191323

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