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Variation of the emission frequency of a terahertz quantum cascade laser

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Abstract

The variation of the emission frequency of a quantum cascade laser of the 3.2 THz range within a single radiation pulse was studied using high-resolution Fourier spectroscopy. A significant (108 MHz) increase in frequency in the first 4 μs of a pulse was found. This increase is attributed to a change in the electron part of permittivity of the laser active region coinciding with a rise in the emission intensity. The frequency dropped by 81 MHz in the following 40 μs of a radiation pulse due to a change in the lattice part of permittivity occurring as the laser active region was heated during a radiation pulse.

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Authors and Affiliations

  1. Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, 603950, Russia

    A. A. Lastovkin, A. V. Ikonnikov, A. V. Antonov, V. Ya. Aleshkin & V. I. Gavrilenko

  2. Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603950, Russia

    A. A. Lastovkin, A. V. Ikonnikov, A. V. Antonov, V. Ya. Aleshkin & V. I. Gavrilenko

  3. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russia

    Yu. G. Sadof’ev

Authors
  1. A. A. Lastovkin
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  2. A. V. Ikonnikov
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  3. A. V. Antonov
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  4. V. Ya. Aleshkin
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  5. V. I. Gavrilenko
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  6. Yu. G. Sadof’ev
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Correspondence to A. V. Ikonnikov.

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Original Russian Text © A.A. Lastovkin, A.V. Ikonnikov, A.V. Antonov, V.Ya. Aleshkin, V.I. Gavrilenko, Yu.G. Sadof’ev, 2016, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2016, Vol. 42, No. 5, pp. 15–23.

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Lastovkin, A.A., Ikonnikov, A.V., Antonov, A.V. et al. Variation of the emission frequency of a terahertz quantum cascade laser. Tech. Phys. Lett. 42, 230–233 (2016). https://doi.org/10.1134/S1063785016030111

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  • DOI: https://doi.org/10.1134/S1063785016030111

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