冒牌自然老師

Nanomechanical resonators
High frequency nanomechanical resonators promise to be next-generation RF signal filters and processors.  Moreover, they are capable of detecting the mass of a single atom and the quanta of a single spin.  We are developing various experimental and theoretical schemes to approach these limits.  Ultimately, we hope that our works will fundamentally change the detection methods for NMR or ESR.

One-dimensional phononics
Heat transfer in one-dimensional system has puzzled generations of physicists.  For the first time, now it is possible to experimentally investigate this problem.  We are developing state-of-art techniques to investigate the heat transfer phenomena in one-dimensional systems.  In particular, we are interested in exploring the potential of utilizing phonons as information carriers and building elements for active control of heat flow in nanoscale materials.

Thermoelectricity for energy harvesting
Thermoelectric devices can directly convert heat into electricity. They are ideal next-generation clean energy resources.  We are conducting various schemes to enhance the efficiency of thermoelectric devices, with special focuses on low-dimensional systems and effects from spin entropy. 

Nanoscale mechatronics
The interplay between mechanics, electronics, phononics, and photonics in nanoscale materials always displays intriguing, and sometimes, unexpected phenomena.  Through experimental investigations, we are starting to understand some basic mechanisms.  Yet much more unknowns are waiting to be discovered.

Nanophotonics of engineered materials
Artificial-engineered structures like metamaterials are capable of exhibiting physical properties far beyond those of natural materials.  Thus one can design their own "atoms" or "molecules" with specific optical functionalities.  We are exploring this new field with aids from electromagnetic simulations and optical experiments.

Quantum effects of displacement currents
We believe that displacement currents, which display the same classical effects as ordinary currents, should exhibit quantum phenomena similar to what have been observed in electrons.  We are developing various theoretical and experimental schemes to investigate the novel effect. 

High pressure synthesis of new materials
Materials synthesized under high-pressure and high-temperature conditions usually exhibit new structures or new phases unfound in conventional synthesis.  We are particularly interested in using this technique to explore nanomaterials or complex oxides with unusual electronic ground states, such as charge density waves, magnetism, and superconductivity.