Title :
Quantum-cascade laser-based nanoscale photoexpansion micro-spectroscopy in mid-infrared and terahertz
Author :
Lu, F. ; Belkin, M.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
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.
Keywords :
atomic force microscopy; cantilevers; infrared spectroscopy; quantum cascade lasers; atomic force microscope cantilever eigenfrequency; laser pulse repetition frequency; midinfrared absorption spectroscopy; spatial resolution; terahertz absorption spectroscopy; tunable midIR QCL; tunable quantum-cascade laser-based nanoscale photoexpansion microspectroscopy; Absorption; Free electron lasers; Microscopy; Quantum cascade lasers; Resonant frequency; Spatial resolution; Spectroscopy;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6104773
