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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 8 — Apr. 22, 2013
  • pp: 10172–10181

Electronic temperatures of terahertz quantum cascade active regions with phonon scattering assisted injection and extraction scheme

Pietro Patimisco, Gaetano Scamarcio, Maria Vittoria Santacroce, Vincenzo Spagnolo, Miriam Serena Vitiello, Emmanuel Dupont, Sylvain R. Laframboise, Saeed Fathololoumi, Ghasem S. Razavipour, and Zbigniew Wasilewski  »View Author Affiliations


Optics Express, Vol. 21, Issue 8, pp. 10172-10181 (2013)
http://dx.doi.org/10.1364/OE.21.010172


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Abstract

We measured the lattice and subband electronic temperatures of terahertz quantum cascade devices based on the optical phonon-scattering assisted active region scheme. While the electronic temperature of the injector state (j = 4) significantly increases by ΔT = Te4 – TL ~40 K, in analogy with the reported values in resonant phonon scheme (ΔT ~70-110 K), both the laser levels (j = 2,3) remain much colder with respect to the latter (by a factor of 3-5) and share the same electronic temperature of the ground level (j = 1). The electronic population ratio n2/n1 shows that the optical phonon scattering efficiently depopulates the lower laser level (j = 2) up to an electronic temperature Te ~180 K.

© 2013 OSA

OCIS Codes
(250.5230) Optoelectronics : Photoluminescence
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: February 19, 2013
Revised Manuscript: March 22, 2013
Manuscript Accepted: March 22, 2013
Published: April 16, 2013

Citation
Pietro Patimisco, Gaetano Scamarcio, Maria Vittoria Santacroce, Vincenzo Spagnolo, Miriam Serena Vitiello, Emmanuel Dupont, Sylvain R. Laframboise, Saeed Fathololoumi, Ghasem S. Razavipour, and Zbigniew Wasilewski, "Electronic temperatures of terahertz quantum cascade active regions with phonon scattering assisted injection and extraction scheme," Opt. Express 21, 10172-10181 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-8-10172


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