SEDL / STP / STP759-EB / STP37035S

Interactions of Intense 2.7 μm Picosecond Laser Pulses with Germanium

Bryant, GW
Washington State University, Pullman, Washington,

Schmid, A
Washington State University, Pullman, Washington,

Braunlich, P
Washington State University, Pullman, Washington,

Kelly, P
Washington State University, Pullman, Washington,

Ritchie, D
Washington State University, Pullman, Washington,

Pages: 5    Published: Oct 1981

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Abstract

Computer simulations of the generation and temporal evolution of hot plasmas in germanium during the passage of intense picosecond laser pulses have been begun. At 2.7μ two-photon absorption is the generating mechanism for carriers. Carrier heating from free-carrier absorption and energy transfer to the lattice through phonon-carrier collisions are described with an electron-hole band model similar to one previously used to describe plasma dynamics in germanium driven by one-photon absorption. Details of this model will be presented and the results available to date will be discussed.