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Applied Physics Letters / Volume 97 / Issue 8 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 97, 081115 (2010); http://dx.doi.org/10.1063/1.3484279 (3 pages)

High performance “continuum-to-continuum” quantum cascade lasers with a broad gain bandwidth of over 400 cm−1

Yu Yao1, Xiaojun Wang2, Jen-Yu Fan2, and Claire F. Gmachl1

1Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
2Adtech Optics, Inc., 18007 Cortney Court, City of Industry, California 91748, USA

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(Received 30 June 2010; accepted 10 August 2010; published online 27 August 2010)

A quantum cascade laser structure is demonstrated that provides a broadband gain spectrum of 430 cm−1 with a peak emission wavelength around 4.8 μm. The laser active region is based on multiple transitions from strongly coupled upper states to lower laser states. In spite of the broad gain spectrum, high laser performance was demonstrated with low threshold current density (as low as 1.6 kA/cm2), large slope efficiency (over 5 W/A) and high wall plug efficiency (up to 23%) in pulsed mode operation at 295 K.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

quantum cascade lasers

PACS

  • 42.55.Px

    Semiconductor lasers; laser diodes

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3484279

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    Y. Bai, S. Slivken, S. Darvish, and M. Razeghi, Appl. Phys. Lett. 93, 021103 (2008)APPLAB000093000002021103000001.

    A. Lyakh, C. Pflügl, L. Diehl, Q. J. Wang, F. Capasso, X. J. Wang, J. Y. Fan, T. Tanbun-Ek, R. Maulini, A. Tsekoun, R. Go, C. Kumar, and N. Patel, Appl. Phys. Lett. 92, 111110 (2008)APPLAB000092000011111110000001.

    Y. Yao, K. Franz, X. Wang, J. Fan, and C. Gmachl, Appl. Phys. Lett. 95, 021105 (2009)APPLAB000095000002021105000001.

    J. Faist, M. Beck, and T. Aellen, Appl. Phys. Lett. 78, 147 (2001)APPLAB000078000002000147000001.

    Y. Yao, W. O. Charles, T. Tsai, J. Chen, G. Wysocki, and C. F. Gmachl, Appl. Phys. Lett. 96, 211106 (2010)APPLAB000096000021211106000001.

    K. Fujita, T. Edamura, S. Furuta, and M. Yamanishi, Appl. Phys. Lett. 96, 241107 (2010)APPLAB000096000024241107000001.


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