
Professor
BS, physics, 1965 Massachusetts Institute of Technology
PhD, plasma physics, 1970 Princeton University
Our group focuses on the following studies.
Carbon nanotubes: Recently we developed a technique whereby large
quantities of nanotubes can be grown at high temperatures. These very high-quality
nanotubes have been used to fabricate flat panel displays.
Photonic crystals: An exciting development has been the fabrication
of a ZnO-based photonic crystal that can also lase. This work will lead
to the integration of nanophotonic devices in the UV optical regime.
Random lasing phenomenon: In collaboration with colleagues
in physics, we have succeeded in making the first observation
of the random lasing effect in a ZnO powder layer. We have
also made the world's smallest laser, a 1.5- micron ZnO particle
cluster.
Quantum dots and wires: Work is in progress to synthesize
and study quantum phenomena in quantum dots and nanowires of
oxide-based materials.
Councillor of the Materials Research Society (MRS)
Principal editor, Journal of Materials Research
Honorary member of the materials research societies of India, Japan, and Korea
MRS Woody Award for outstanding service to the society, 1988
MRS president, 1989
Founding president, board of advisers, International Union of Materials Research Societies; chair, 1993–94
Fellow, American Vacuum Society, 1994
General secretary, International Union of Materials Research Societies, 1994–present
"Properties of multiplayer transparent conducting oxide
films," E.J.J. Martin, M. Yan, M. Lane, J. Ireland, C.R. Kannewurf
and R.P.H. Chang, Thin Solid Films, vol.461, pp. 309-315 (2004).
" Optically pumped ultraviolet microdisk laser on a silicon substrate," X.
Liu, W. Fang, Y. Huang, X. H. Wu, S. T. Ho, H. Cao, and R. P. H. Chang, Applied
Physics Letters, vol. 84, 14, pp. 2488-2490 (April 5, 2004).
" Growth mechanism and properties of ZnO nanorods synthesized by plasma-enhanced
chemical vapor deposition," Xiang Liu, Xiaohua Wu, Hui Cao and R.P.H.
Chang, Journal of Applied Physics, (March 15, 2004).
" Random lasing in closely packed resonant scatterers," X.H.H., A.
Yamilov, N. Noh, H. Cao, E.W. Seelig and R.P.H. Chang, Journal of the
Optical Society of America, B- Optical Physics, 21 (1), pp. 159-167 (Jan.
2004).
" Materials science and integration bases for fabrication of (BaxSr1-x)TiO3
thin film capacitors with layered Cu-based electrodes," W. Fan, B. Kabius,
J.M. Hiller, S. Saha, J. A. Carlisle, O. Auciello, R.P.H. Chang, and R. Ramesh, Journal
of Applied Physics, vol. 94, number 9, pp. 6192-6200 (November 1, 2003).