03 خرداد 1403
رعد چگل

رعد چگل

مرتبه علمی: دانشیار
نشانی: دانشگاه ملایر
تحصیلات: دکترای تخصصی / نانو اپتیک
تلفن: 09166615727
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
Linear optical response of carbon nanotubes under axial magnetic field
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Tight bindingNanotubeOptical propertiesAxial magnetic effectElectronic properties
سال
2010
مجله PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
پژوهشگران رعد چگل

چکیده

We considered single walled carbon naotubes (SWCNTs) as real three dimensional (3D) systems in a cylindrical coordinate. The optical matrix elements and linear susceptibility, , in the tight binding approximation in terms of one-dimensional wave vector, kz and subband index, l are calculated. In an external axial magnetic field optical frequency dependence of linear susceptibility are investigated. We found that axial magnetic field has two effects on the imaginary part of the linear susceptibility spectrum, in agreement with experimental results. The first effect is broadening and the second, splitting. Also we found that for all metallic zigzag and armchair SWCNTs, the axial magnetic field leads to the creation of a peak with energy less than 1.5 eV, contrary to what is observed in the absence of a magnetic field.