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重点研究组
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研究组
Purdue University

Xianfan Xu
Professor of Mechanical Engineering
Professor of Electrical and Computer Engineering (by courtesy)
School of Mechanical Engineering
Purdue University
https://engineering.purdue.edu/~xxu/
https://engineering.purdue.edu/NanoLab/
Research Areas:

1) Nanoscale energy transport
We investigate energy transport in nanoscale materials used for efficient energy conversion, including photovoltaic and thermoelectric energy conversion, and nanoscale materials for controlling - reducing or enhancing - thermal transport. At a microscopic level, energy transport and conversion is ultimately determined by the ultrafast dynamics of interactions among basic energy carriers such as electrons, phonons, and photons, which occur at a time scale of femtosecond (fs, 10^-15 s) to picosecond (ps, 10^-12 s). We develop advanced femtosecond (fs) laser based high temporal (~ 10 fs) and high spatial (~ 10's nm) resolution experimental techniques (e.g., coherent phonon spectroscopy) and molecular dynamics simulation techniques for the study of ultrafast energy transfer and conversion dynamics.

- Energy transport in thermoelectric materials for waste heat recovery from automobile exhaust gas
- Energy transport in nanoscale thermoelectric materials for power generation
- Coherent control of thermal transport
- Thermal transport in nanoscale thermal interface materials
- Energy transfer in nanoscale photovoltaic materials

(2) Nano-optics and laser-based nano-optical engineering.
We are working on a broad range of topics related to nano-optics and nano-optical engineering. Our current effort is on laser-based nano-engineering using nanoscale optical antennas, which are developed in our laboratory. These antennas are capable of efficiently focusing light into a nanometer domain with intensity orders of magnitude higher than the incoming light intensity. Being able to concentrate light into a nanoscale domain with high intensity has numerous applications in nano-engineering, including nano-manufacturing, nanoscale imaging and diagnostics, and ultra-high density data storage. Our current research involves nano-optics theory (e.g., plasmonics), numerical design, micro/nano fabrication, experimental testing, instrumentation development, and applications in emerging engineering areas.

- Parallel nanolithography using nanoscale optical antenna
- Parallel nanomaterials synthesis using nanoscale optical antenna and device development
- Near-field scanning optical microscopy
- Near-field radiation
- High density data storage using nanoscale optical antenna

特色
研究进展
领军人物