Evolution Regularity of Continuous Surface Structures Shaped by Laser-Supported Fictive-Temperature Modifying

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

Dynamic Analysis of Asymmetric Structures Supported by a Sliding Foundation

Dynamic Analysis of Asymmetric Structures Supported by a Sliding Foundation

Nanofabrication of tailored surface structures in dielectrics using temporally shaped femtosecond-laser pulses.

We have investigated the use of tightly focused, temporally shaped femtosecond (fs)-laser pulses for producing nanostructures in two dielectric materials (sapphire and phosphate glass) with different characteristics in their response to pulsed laser radiation. For this purpose, laser pulses shaped by third-order dispersion (TOD) were used to generate temporally asymmetric excitation pulses, lea...

Temperature dependence and stability of surface structures

Several years ago, Burton and Jura' reported a calculation that was based on an Einstein model and that predicted a structural phase transition for the (100) surface of Ar. On the basis of this calculation, one might expect to be able to observe such a surface phase transition in noble-gas solids and other fcc materials, such as Al and Ni. We show in Fig. 1(a) the unrearranged fcc (100) surface...