M. A. Belkin, M. Troccoli, L. Diehl, F. Capasso, A. A. Belyanin, and D. L. Sivco, "Quasi-Phase Matching of Second-Harmonic Generation by Modulation of Electron Population Density in Quantum Cascade Lasers,"
in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science and Photonic Applications Systems Technologies,
Technical Digest (CD)
(Optical Society of America, 2005), paper QPDA1.