Resonant second-order nonlinear optical processes in quantum cascade lasers. Academic Article uri icon


  • We demonstrate an efficient intracavity nonlinear interaction of laser modes in a specially adapted quantum cascade laser. A two-wavelength quantum cascade laser structure emitting at wavelengths of 7.1 and 9.5 micrometer included cascaded resonant optical intersubband transitions in an intracavity configuration leading to resonantly enhanced sum-frequency and second-harmonic generation at wavelengths of 4.1, 3.6, and 4.7 micrometer respectively. Laser peak optical powers of 60 and 80 mW resulted in 30 nW of sum-frequency signal and 10-15 nW of second-harmonic signal, both in good agreement with theoretical calculations.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Owschimikow, N., Gmachl, C., Belyanin, A., Kocharovsky, V., Sivco, D. L., Colombelli, R., Capasso, F., & Cho, A. Y.

citation count

  • 105

complete list of authors

  • Owschimikow, Nina||Gmachl, Claire||Belyanin, Alexey||Kocharovsky, Vitaly||Sivco, Deborah L||Colombelli, Raffaele||Capasso, Federico||Cho, Alfred Y

publication date

  • January 2003