منابع مشابه
Optical Properties of Cd1−xMnxTe Crystals near Fundamental Absorption Edge in Transverse Magnetic Fields
A simple and convenient model is proposed to elucidate the optical characteristics of Cd1−xMnxTe crystals using experimental data on light reflection in magnetic field. The model is based on the quasi-oscillator concept accounting both for the exciton and fundamental absorption edge contributions. The energy dependencies of refraction index and absorption coefficient are presented for Mn mole f...
متن کاملcontrol 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...
15 صفحه اولFundamental limits of optical microrheology.
We estimate the fundamental limits of different microrheological techniques based on optical detection. It is suggested that particle tracking systems using nondifferential detection have a minimum detectable displacement given by 0.2(lambda0/NA)(1/square root of (SNR)), where lambda0 is the wavelength, NA is the numerical aperture of the focusing objective, and SNR is the signal-to-noise ratio...
متن کاملProbing variations in fundamental constants with radio and optical quasar absorption-line observations
Nine quasar absorption spectra at 21-cm and ultraviolet (UV) rest-frame wavelengths are used to estimate possible variations in x ≡αgpμ, where α is the fine structure constant, gp the proton g-factor and μ ≡ me/mp is the electron-to-proton mass ratio. We find 〈 x/x〉 total = (0.63 ± 0.99) × 10−5 over a redshift range 0.23 zabs 2.35 which corresponds to look-back times of 2.7–10.5 billion years. ...
متن کاملFundamental limit for optical components
We show that there is a general limit to the performance of linear optical components, based only on their size, shape, and dielectric constants. The limit is otherwise independent of the design. The mathematics involved applies generally to linear systems with arbitrarily strong multiple scattering. Relevant optical structures include dielectric stacks, photonic crystals, nanometallics, metama...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Solid State Communications
سال: 2001
ISSN: 0038-1098
DOI: 10.1016/s0038-1098(01)00363-5