Mid/far-infrared semiconductor devices exploiting plasmonic effects

R. Colombelli; Y. Chassagneux; A. Bousseksou; V. Moreau; S. Barbieri; C. Sirtori; G. Patriarche; G. Beaudoin; I. Sagnes; H. E. Beere; D. A. Ritchie

doi:10.1117/12.814892

26 January 2009 Mid/far-infrared semiconductor devices exploiting plasmonic effects

R. Colombelli, Y. Chassagneux, A. Bousseksou, V. Moreau, S. Barbieri, C. Sirtori, G. Patriarche, G. Beaudoin, I. Sagnes, H. E. Beere, D. A. Ritchie

Author Affiliations +

Proceedings Volume 7222, Quantum Sensing and Nanophotonic Devices VI; 722218 (2009) https://doi.org/10.1117/12.814892
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

We show how metallic waveguides offer the opportunity of implementing interesting functionalities for semiconductor lasers within a simple technological approach. In the THz, we show that the active region thickness of quantum cascade lasers can be reduced by a factor of 2 without effects on the threshold current density and maximum operating temperature of the laser. Pulsed and continuous-wave operation - with a low threshold J_th= 71 A/cm² - are obtained for a 5.86-μm-thick THz QC laser. The emission is peaked at λ≈115 μm and the waveguide resonator is based on a metal-metal geometry. In the mid-infrared, we demonstrate surface-plasmon distributed-feedback quantum cascade lasers with a first-order grating realised by the sole patterning the top metallic contact. The devices have a single mode emission with a side-mode suppression ratio greater than 20dB. The emission wavelength at 78K is centred at λ = 7.3 μm and has tuning rate as a function of the temperature of ≈0.4 nm/K.

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R. Colombelli, Y. Chassagneux, A. Bousseksou, V. Moreau, S. Barbieri, C. Sirtori, G. Patriarche, G. Beaudoin, I. Sagnes, H. E. Beere, and D. A. Ritchie "Mid/far-infrared semiconductor devices exploiting plasmonic effects", Proc. SPIE 7222, Quantum Sensing and Nanophotonic Devices VI, 722218 (26 January 2009); https://doi.org/10.1117/12.814892

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