CHAN, Ho Bun(陈浩斌)



       Department of Physics

       The Hong Kong University of Science and Technology


       Office: Room 4421

       Telephone: (852) 2358 7493

       Fax: (852) 2358 1652


       Labs: Room 2231A and Room 4121B

       Telephone: (852) 2358 5905





Micro- and Nano-electromechanical Systems


Micro- and Nano- electromechanical systems (MEMS and NEMS), are small, movable structures created using integrated circuit technology. Processes that fabricate microelectronic chips, such as lithography, etching and deposition, are used to create movable components in the um or nm scale on a semiconductor wafer. The small size, quick response time, high sensitivity and low cost of MEMS have made them a compelling choice for a variety of applications. For instance, micromechanical sensors are nowadays widely used in automobiles for detecting acceleration and micromirror arrays plays an important role in display devices such as projectors. Apart from the obvious commercial value of MEMS, their high sensitivity and functionality offer unique capabilities for carrying out fundamental physics experiments. Our research group uses micro- and nano-mechanical devices as sensitive force detectors, e.g. in Casimir force measurements and in magnetometry. We also investigate the interplay of fluctuations and nonlinearity in periodically driven oscillators. Another project aims to tailor the coupling of the optical and mechanical degrees of freedom through the strongly spatial dependent evanescent field in subwavelength metallic structures.

                Quantum mechanical Casimir forces in micromechanical systems

                Nonlinear mode coupling and fluctuation induced transitions in electromechanical resonators

                Evanescent field coupling in subwavelength metallic structures

                Micromechanical magnetometers