Amplification of a high-frequency wave by IR-field-heatedclusters

✍ Scribed by Ph. Korneev; W. Becker

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 207 KB
• Volume: 7
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.201010004

✦ Synopsis

The nonequilibrium nanoplasma created by irradiation of a cluster, or other nanosystems such as large molecules, with an intense infrared-laser field may be used as an amplifying medium for a high-frequency probe field. We employ a simple description where the nanosystem is modeled by particles bound by a self-consitent potential. An incident probe field suffers gain or loss depending on the respective parameters by a mechanism that is usually referred to as collisionless damping. The model is simple enough to allow for an essentially analytical solution. γ 3 (ω), ×10 -3 a.u. -4 -3 -2 -1 0 30 25 20 15 10 5 0 ω, a.u.

Absorption rate of the nonequilibrium cluster. Negative absorption corresponds to amplification. See text below for further explanations