This article is cited in 3 papers

XIV Annual International Workshop ''Nanophysics and Nanoelectronics 2010''

High-resolution emission spectra of pulsed terahertz quantum-cascade lasers

A. V. Ikonnikov^a, A. V. Antonov^a, A. A. Lastovkin^a, V. I. Gavrilenko^a, Yu. G. Sadof'ev^a, N. Samal<sup>b

a</sup> Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod
^b Trion Technology, AZ 85281 Tempe, USA

Abstract: The spectra of pulsed terahertz quantum-cascade lasers were measured with high spectral resolution. The characteristic line width at half maximum was 0.01 cm$^{-1}$; it is controlled by laser temperature variations during the supply voltage pulse. It was shown that an increase in the laser temperature leads to a decrease in the emission frequency, which is caused by an increase in the effective refractive index of the active region. It was also found that a decrease in the supply voltage results in a decrease in the emission frequency, which is caused by a change in the energy of diagonal transitions between lasing levels.

Received: 08.04.2010
Accepted: 08.04.2010

 English version: DOI: 10.1134/S1063782610110175

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