Enhancement of resonant absorption through excitation of SPR

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• 作者：Danilo Giulietti^a ; L. Calcagno^e ; Alessandro Curcio^b ; ^c ; M. Cutroneo^f ; Mario Galletti^b ; ^{mario.gall22@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; J. Skala^g ; L. Torrisi^d ; M. Zimbone^e
• 关键词：Laser&ndash ; solid target interaction ; Nanoparticle implantation ; Surface plasmons ; Electronic plasma waves
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：1 September 2016
• 年：2016
• 卷：829
• 期：Complete
• 页码：117-120
• 全文大小：761 K

文摘

In this experiment the absorption of the laser radiation impinging on polymeric films with Au nanoparticles implanted in surface was studied. By varying the polarization and the incidence angle of the laser radiation on target, the role in the laser absorption of both excitation of surface plasmons and excitation of electronic plasma waves at critical density through resonant absorption was highlighted. In conditions of p-polarized laser irradiations at ${10}^{15}\mathrm{W}/{\mathrm{cm}}^2$ intensity, resonant absorption can be induced in films enhancing proton and ion acceleration. Plasma on-line diagnostics is based on SiC detectors. Measurements of kinetic energy of accelerated ions indicate a significant increment using p-polarized laser light with respect to no-polarized light irradiation.