He has made important accomplishments in such diverse areas as light scattering from semiconductors and liquid helium, laser diagnostics of tokomak plasmas for fusion studies, squeezed state generation and the application of squeezed states to sensitive measurement, whispering-gallery mode microdisk lasers
, and optical pulse propagation in nonlinear media.
These microdisk lasers
operate in what researchers call a "whispering gallery" mode, named for the way words whispered at one location near the interior wall of a circular, domed chamber can be readily overheard anywhere else along the wall.
Deformed wavelength-scale microdisk lasers
with quantum dot emitters.
Once the microdisk lasers
are formed, the lasers' substrate (the indium phosphide [InP] platform on which the indium gallium arsenide phosphide [InGaAsP] lasers were built) is etched away.
These small, fast, low-power microdisk lasers
are part of our research effort," said Richard Slusher, head of Bell Labs Optical Physics Research department.