ZhETF, Vol. 135,
p. 865 (May 2009)
(English translation - JETP,
Vol. 108, No. 5,
available online at www.springer.com
SIZE RESONANCES IN PENETRATION OF INTENSE FEMTOSECOND LASER PULSES THROUGH ULTRA-THIN FOILS
Bordyuh N.V., Krainov V.P.
Received: January 11, 2009
An analytic expression for the transmission coefficient as a function of the foil thickness d describing penetration of intense femtosecond laser pulses through ultra-thin foils with the thickness of the order of 30-100 nm is derived using the Vlasov-Boltzmann equation. It is found that the transmission of laser radiation stops at the skin depth c/ωp, but sharp and narrow resonances occur for the foil thickness d>c/ω p with the transmission coefficient T=1.