Birefringence measurement in the terahertz range based on double Fourier analysis.

Application of terahertz spectroscopy to the characterization of biological samples using birefringence silicon grating.

We present a device and method for performing vector transmission spectroscopy on biological specimens at terahertz (THz) frequencies. The device consists of artificial dielectric birefringence obtained from silicon microfluidic grating structures. The device can measure the complex dielectric function of a liquid, across a wide THz band of 2 to 5.5 THz, using a Fourier transform infrared spect...

امکان جذب تراهرتز توسط چاه پتانسیل کوانتمی دو گانه و پایداری آن

In this paper, the optical properties of the quantum double folded potential well in the terahertz frequency region are investigated. The Schrödinger equation is solved and using the obtained wave functions, the standard density matrix and the iterative method the refractive index and the absorption coefficient in the first order is calculated and investigated. The results show that for the pro...

Investigation of Thermal Dispersion and Thermally-Induced Birefringence on High-Power Double Clad Yb:Glass Fiber Laser

In this work the effects of heat generation on the modes of Yb:Glass double clad fiber laser were investigated. The thermal dispersion and thermally-induced birefringence were considered when the gain medium becomes an anisotropic medium. The results showed considerable modifications of laser modes profiles, in particular for transfer magnetic (TM) and transfer electric (TE) modes which their p...

Thin-form birefringence quarter-wave plate for lower terahertz range based on silicon grating

We have developed a thin quarter-wave plate (QWP) operating at low terahertz frequency of 0.51 THz by etching micro-grating on a silicon substrate. The grating period is 30 μm, and the etching depth is 156 μm. Stokes parameters are used to characterize the QWP. The QWP shows a high transmission coefficient of 0.93 and a low polarization dependent loss (PDL) of 1.4 dB at 0.51 THz. © 2013 Society...

Temperature-dependent optical constants and birefringence of nematic liquid crystal 5CB in the terahertz frequency range