His research falls into two broad areas: 1.
Condensed matter and
chemical physics studies of surfaces; 2.
Optical physics and devices. Thus his research has included extensive studies in basic studies in optical-excited and -probed surface physics and chemistry, in the development of new infrared and UV lasers, optical physics, application of lasers for material processing. His major research highlights are as follows. He, along with William Eppers, developed the first high power CO laser (a
quantum cascade gas laser), as well as other infrared lasers including the first high powered 16 um laser for
isotope separation. In 1979 he developed with Daniel Ehrlich and Peter Moulton a UV
solid-state laser, then the optically pumped solid-state laser with the shortest wavelength. Osgood, along with
Ali Javan, made the first direct observation of vibrational-vibrational energy transfer and exchange in
hydrogen halides. Later he made the first direct observation (with Steven Brueck) of vibration energy flow in molecules in cryogenic liquids the studies. A notable results of this work was the observation of the extremely long (60s) lifetime of N2 in its cryogenic state. In the late 1970s, he, along with
Thomas F. Deutsch and
Daniel J. Ehrlich, demonstrated submicrometer-scale chemical processing of the surfaces of electronic materials. These experiments demonstrated deposition of metals, etching of semiconductors, and
doping of semiconductors. One these methods, laser-induced Si etching the role of
surface plasmons in surface
photochemistry, and the role of electron-hole pair chemistry and surface interactions in orienting surface species. From 1998 to 2014 he and Miguel Levy developed ion-based "lift-off" methods for single-crystalline thin films, for example, ion-implantation of He to generate (Crystal Ion Slicing) slicing of metal-oxide films (garnets and ferroelectrics). These garnet thin films were shown to be useful for
optical isolators. In 2001, he, along with Mike Steel, developed novel
photonic crystal fibers (photonic crystal fibers, PCF) with an elliptical cavity shape of the tubes and features such as high
birefringence with a stable single-mode operation (zero walk off). In 2002 he pioneered in developing Si photonics wires on silicon on insulator for new compact passive, active, and optical new linear device. His work in nonlinear Si photonics with his students and Jerry Dadap and Nicolae Panoiu is described in this reference. His group carried out the initial studies of linear and nonlinear Si-nanowire-photonics, including in 2001
Raman amplification (
optical amplifier) in SOI technology (
silicon-on-insulator, that is, silicon wires on an insulating underlay, with dimensions in the sub-micron range) In addition, he developed a high-speed Si thermooptical switch and demonstrated diode-pumped fourwave mixing in the waveguides. In later work, he, along with students and colleagues at IBM Watson Lab, demonstrated the first high gain
optical parametric oscillator using an optically pumped Si-wire waveguide. This device operated above the two-photon absorption threshold and thus was not impaired by this nonlinear-loss mechanism. His research into Si wire
waveguides, as well as his earlier work on III-V waveguide devices, led to a major effort to develop a more effective integrated optics design tool that was commonly available at the time. The computational optical simulation work led to the founding of RSoft by Robert Scarmozzino, a major integrated optical simulation company. In 2005, he, along with Steve Brueck, Nicholae Panoiu, S. Zhang, and W. Fan, demonstrated with the first observation of near infrared.
negative refractive index metamaterials. His research in light interactions with surfaces and this crystal layers led to a series of important experiments showing the role of surface dipoles to orient molecules for anisotropic photo- and electron fragmentation and the importance of coverage in controlling the fragmentation mechanism of surface bound molecules in the presence of UV illuminations, and finally (as mentioned earlier) the role of surface plasmons in enhancing and localizing surface photoreactions. In addition, his research using two-photon photoemission with pulsed UV lasers was instrumental in early studies of image states on vicinal single-crystal metal surfaces. More recently in collaboration with Kevin Knox, Wencan Jin, Po-chun Yeh, Nader Zaki and Jerry Dadap, he used tightly focused UV photoemission based on a SPE-LEEM system to carry out the first photoemission studies of exfoliated
graphene and transition metal dichalogide single samples and the influence of surface corrugation and layer number on sample electronic structure. As of November 11, 2015, Osgood's publications have been cited 13,696 times, and he has an
h-index of 65. == Awards ==