Ultrafast hole-burning in intersubband absorption lines of GaN/AlN superlattices

  title={Ultrafast hole-burning in intersubband absorption lines of GaN/AlN superlattices},
  author={Zhen Wang and Klaus Reimann and Michael W{\"o}rner and Thomas Elsaesser and Esther Baumann and F. Giorgetta and Daniel Hofstetter and Hua Y. Wu and W. J. Schaff and L E Eastman},
  journal={2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference},
Femtosecond two-color pump-probe experiments on intersubband absorption spectra of electrons in a GaN/AlN superlattice show distinct spectral holes unraveling both the homogeneous broadening contribution and the underlying optical phonon progression. 

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