Mid-infrared intersubband absorption in lattice-matched AlInN/GaN multiple-quantum wells

Mauro Mosca, Julien, Ilegems, Nicolas Grandjean, Mauro Mosca, Carlin, Tchernycheva, Butt́, Nicolay, Nevou, Eric Feltin, Butt́

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87 Citations (Scopus)


We report the observation of midinfrared intersubband (ISB) absorption in nearly lattice-matched AlInNGaN multiple-quantum-wells. A clear absorption peak is observed around 3 μm involving transitions from the conduction band ground state to the first excited state. In addition to ISB absorption, photoluminescence experiments were carried out on lattice- matched AlInNGaN single quantum wells in order to determine the spontaneous polarization discontinuity between GaN and Al0.82 In0.18 N compounds. The experimental value is in good agreement with theoretical predictions. Our results demonstrate that the AlInNGaN system is very promising to achieve crack-free and low dislocation density structures dedicated to intersubband devices in the 2-4 μm wavelength range.
Original languageEnglish
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Publication statusPublished - 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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