شماره ركورد
5649
شماره راهنما(اين فيلد مربوط به كارشناس ميباشد لطفا آن را خالي بگذاريد)
5649
پديد آورنده
نسيم شريف زاده
عنوان
بررسي ميدان الكتريكي در برهم كنش ليزرهاي فمتوثانيه با اهداف فلزي
مقطع تحصيلي
كارشناسي ارشد
رشته تحصيلي
فيزيك
سال تحصيل
مهر 1385
تاريخ دفاع
مهر 1385
استاد راهنما
دكتر مهديه
چكيده
Abstract
High intensity lasers interacting matters and plasmas have been interested
for many years. Laser-produced plasmas are attractive compact x-ray
sources. Recently some experimental results have shown that hard x-ray
emission from plasmas produced by intense laser pulses on optically
polished targets can be enhanced if nano-particle coated targets exposed to
such intense laser beams.
In this work we have modeled the local enhancement by spherical nanoparticles.
Using “Rayleigh” theory and “Drude-Lorentz” model the
scattering cross section have been calculated. The results show that field
enhancement has a resonance behavior and depends strongly on particle size
and geometry of nano-particles.