fa چرخش سریع ذرات فلزی کوچک در تله‌ی نوری تخصصی Special پژوهشي Research Optical tweezers have become powerful tools in many areas. By transferring light momentum from photons to micro- and nano-particles, one could immobilize submicron particles, transport them and also measure sub-picoNewton forces. In this paper we show by utilizing the angular momentum of a circularly polarized light, metallic nano particles rotate. Rotation speed depends to laser power and particle shape and size. Here, we show that rotation speed for round shape particle raise up to few kHz. انبرک نوری, نانوذرات فلزی, گشتاور نوری, اندازه حرکت زاویه‌ای Optical tweezers, Metallic nano particles, Optical torque, Angular momentum 1009 1012 http://opsi.ir/browse.php?a_code=A-10-1-639&slc_lang=fa&sid=1 Faegheh Hajizadeh فائقه حاجی زاده hajizade@iasbs.ac.ir 10031947532846003304 10031947532846003304 Yes Lei Shao لی شاو lei.shao@chalmers.se 10031947532846003305 10031947532846003305 No Mikael Käll میکائیل شل mikael.kall@chalmers.se 10031947532846003306 10031947532846003306 No