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Currently working on a novel solder transfer technique for carbon nanotube pillars, which will be used as a field-emission electron source in an ultra-high vacuum chamber. Also working on a novel method for growing short, dense, well-aligned carbon nanotube forests by mines of applied high voltage during the growth stage. On the industrial side, developing practical methods for sorting scrap metal using x-ray spectra, and ultrasound reflections.
January 2001 - December 2009
- Ultrafast laser-matter interactions
- Designed and built a working ultrafast photo-electron diffractometer for the sub-picosecond monitoring of laser-matter interactions. Most experiments were with ultrathin free standing films of gold or platinum.
A brief analysis of the Physical Origins of Electrical Conductivity and Resistivity
Ultrafast laser pulses - optical pulses shorter than a picosecond - result in rapid processes occurring at both the surface and the interior of solid materials. Understanding these processes requires ultrafast probes; optical probes (reflectivity, spectral) are suitable for some surface studies, but the tracking of structural changes are well suite...
A simple optical amplification system is introduced to improve the sensitivity of both the photothermal deflection detection scheme and the surface thermal lensing technique. Model calculations and experimental data show that the photothermal signals can be easily amplified by more than an order of magnitude and that the technique can be readily ap...
Ultrasensitive detection of photothermal signals of thin films by using an optical amplification system
The experimental set-up will use a nonlinear crystal (BBO) to generate the polarization entangled photons via spontaneous parametric downconversion, computer-controlled polarization optics and high-efficienty single photon detectors.