08 مهر 1401

سید سجاد موسوی فرد

مرتبه علمی: استادیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک - اتمی مولکولی زمینه اپتیک
تلفن:
دانشکده: معاونت آموزشی و پژوهشی (ویژه گروه علوم پایه)

مشخصات پژوهش

عنوان
Design of LCPG-type polarization-independent shutter with diffractive efficiency and high contrast at wavelength 532 nm
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
polarization gratings, diffraction, laser beam splitter
پژوهشگران مسعود کاوش تهرانی (نفر اول)، سید سجاد موسوی فرد (نفر دوم)

چکیده

Abstract We have designed liquid crystal (LC) shutter of LCPG type with high diffractive efficiency and transmission rate of more than 99.747% for modulation of non-polar light with wavelength 532 nm and high contrast in this article. Compared to other similar cases, the advantages of this design include maximization of transmission percent of diffractive element (particularly first-order diffraction) and minimization of light leakage rate caused by zero-order, and other unwanted diffractive orders. The conditions have been prepared for using diffractive elements (gratings) with shorter periods and acquisition of diffraction orders with greater diffraction angles by benefitting from suitable compounds of LC in the given design. Similarly, required measures have been taken for the deletion of adverse effects caused by reflection from optic surfaces so that very appropriate status is prepared for the function of LCPG shutter.