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2 results on '"G.Paul Perryman"'

1. Picosecond optically-induced intervalence band absorption in germanium

Author

G.Paul Perryman, Arthur L. Smirl, and Alan Miller

Subjects
Materials science, business.industry, chemistry.chemical_element, Germanium, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Glass laser, Optics, chemistry, Picosecond, Attenuation coefficient, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, business, Absorption (electromagnetic radiation), Saturation (chemistry), Excitation, Beam (structure)
Abstract

By using a mode-locked Nd: glass laser with much improved beam properties, we have observed the onset of direct intervalence band absorption at 1.06 μm in germanium at excitation levels between 225 MW/cm 2 (≈2 mJ/cm 2 ) and 10 GW/cm 2 (≈75 mJ/cm 2 ). This absorption limits the transmission to a maximum value well below that expected for complete saturation of the direct valence-to-conduction band absorption coefficient by band filling.

Published
1981
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2. Anisotropic state filling in semiconductors

Author

G.Paul Perryman, Alan Miller, Arthur L. Smirl, Thomas F. Boggess, and B. S. Wherrett

Subjects
Materials science, Semiconductor, chemistry, Condensed matter physics, business.industry, Picosecond, General Engineering, chemistry.chemical_element, Germanium, State (functional analysis), business, Anisotropy, Excitation
Abstract

Picosecond self-diffraction measurements in germanium indicate that, for excitation levels in excess of 1 GW/cm2, we observe the effects of anisotropic state-filling. A new theoretical model is outlined and agreement is found with all aspects of the data.

Published
1983
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