Nanowires for THz Spectroscopy
Technical rept. 21 Jul 2010-30 Apr 2012
NEW MEXICO UNIV ALBUQUERQUE
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Detailed experimental investigation of THz emission mechanisms in InAs nanowires is performed. Multiple independent measurements are brought into quantitative agreement by means of the developed model, which includes contributions of quantized surface plasmon modes of the cylindrical nanowire geometry. THz emission from ordered array of InAs nanowires is also investigated, and model predictions are verified using developed broadband THz spectrometer. Novel pyramid hexagonal lattice structures developed during this work have proven as extremely broadband octave-spanning THz nanoscale emitter sources with attractive potential for a variety of applications. To perform broadband measurements, novel THz spectrometer has been developed with operating up to 20 THz. Novel electro-absorption sampling technique has been developed using multiple quantum well structures. Franz-Keldysh effect has been identified as the main detection mechanism and coherent detection of THz pulses has been demonstrated. THz imaging with electro-absorption effect using conventional visible wavelengths imaging systems has also been demonstrated.
- Electrical and Electronic Equipment