Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Advances in THz quantum cascade lasers: fulfilling the application potential

[+] Author Affiliations
Alessandro Tredicucci, Lukas Mahler, Tonia Losco, Jihua Xu, Cosimo Mauro, Ruedeger Koehler

NEST-IFM (Italy) and Scuola Normale Superiore (Italy)

Harvey E. Beere, David A. Ritchie

Cavendish Lab., Univ. of Cambridge (United Kingdom)

Edmund H. Linfield

Univ. of Leeds (United Kingdom)

Proc. SPIE 5738, Novel In-Plane Semiconductor Lasers IV, 146 (April 11, 2005); doi:10.1117/12.597121
Text Size: A A A
From Conference Volume 5738

  • Novel In-Plane Semiconductor Lasers IV
  • Carmen Mermelstein; David P. Bour
  • San Jose, California, United States | January 22, 2005

abstract

Quantum cascade (QC) lasers operating at terahertz frequencies were demonstrated two and a half years ago, and, since then, their development has proceeded at a very rapid pace. Most of the research has focused on new concepts for the quantum design of the gain medium as well as on improving device structure by optimizing fabrication and waveguide technology. These efforts by various groups have led to maximum operating temperatures of about 140 K in pulsed mode, output powers of up to 50 mW, and lasing in continuous wave up to 93 K. Such advances are making THz QC lasers more and more appealing for applications in various fields like chemical sensing, astronomy, spectroscopy, and imaging. For their successful implementation, specific requirements have to be addressed, particularly concerning the spectral properties of the emission. Here we report some latest developments in this direction. We demonstrate the perfect control of laser design for the realization of devices with precisely defined emission frequency in the whole range from 2.3 THz to 4.8 THz. Additionally, single-mode THz lasers with distributed feedback resonators have been achieved and a new technique involving surface plasmon gratings has been developed to improve performances. The latter offers also the possibility of constructing distributed Bragg gratings as a replacement for high-reflection coatings. Finally, solutions allowing broad tuneability are examined, with preliminary results illustrating the viability of external cavity set-ups.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Alessandro Tredicucci ; Lukas Mahler ; Tonia Losco ; Jihua Xu ; Cosimo Mauro, et al.
"Advances in THz quantum cascade lasers: fulfilling the application potential", Proc. SPIE 5738, Novel In-Plane Semiconductor Lasers IV, 146 (April 11, 2005); doi:10.1117/12.597121; http://dx.doi.org/10.1117/12.597121


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.