Quantum-cascade laser-based nanoscale photoexpansion micro-spectroscopy in mid-infrared and terahertz

  • Lu F
  • Belkin M
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We report highly-sensitive photoexpansion micro-spectroscopy using tunable quantum cascade lasers in mid-infrared and terahertz. High sensitivity is obtained by moving laser pulses repetition frequency in resonance with an atomic force microscope cantilever eigenfrequency. 50 nm spatial resolution is demonstrated with a tunable mid-IR QCL.

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  • F. Lu

  • M. A. Belkin

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