[PDF] Top 20 Polarizing terahertz waves with nematic liquid crystals

... N. Matveenko, P. D. Rudych, and N. A. Vinokurov, Int. J. Infrared Millim. Waves 28, 219 (2007). Fig. 3. (Color online) Polarization factors of THz LC polar- izers. The black circles, red squares, and blue ... See full document

... of nematic liquid crystals to modal excitations of guided acoustic ...of liquid crystal molecules in a cell can be tilted by ultrasound at oblique ...filled with homeotropically aligned ... See full document

... (2004) Terahertz Phase Shifter with Nematic Liquid Crystal in a Magnetic Field, Molecular Crystals and Liquid Crystals, 421:1, 157-164, DOI: ... See full document

... a Dept. of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan (ROC) b Department of Physics, National Tsing Hua University, Hsinchu, Taiwan (ROC) ABSTRACT We investigated the phenomena of a metallic photonic ... See full document

... of liquid crystals 共LCs兲 is well known and extensively utilized in optical systems for control and manipulation of visible, infrared and millimeter wave ...employed liquid crystals suc- ... See full document

... antenna-based terahertz-TDS system with a colli- mated beam at the sample position 27 had been ...the terahertz-TDS system is shown in ...the terahertz wave. The terahertz fields of e ... See full document

... THz waves, such a straightforward analysis is ...voltage with a sinusoidal waveform at 1 kHz, V RMS was greater than the threshold voltage (V RMS > V TN ), the LC molecules reoriented themselves toward the ... See full document

... Abstract—We present the use of electrically controlled bire- fringence in a nematic liquid crystal cell for phase shifting of electromagnetic waves up to terahertz frequencies. This device was ... See full document

... using liquid crystals (LCs) for the terahertz (THz) wave, ...LCs with significantly reduced response times (7 s) than devices with neat LCs was ... See full document

... chiral nematic (N*) phase in GLC-1 ...chiral nematic (N*) phase transition, in which both phases can be observed under polarizing optical microscope ...mixture with temperature ranging from ... See full document

... plates with a refractive index of ...coated with polyimide (PI, SE-130B by Nissan), and then rubbed for ho- mogenous ...filled with a room tem- perature NLC (E7, Merck) and sealed with a fused ... See full document

... to the rubbing direction. Since the maximal absorbance axis of dyes is along the LC director in this work, the parallel compo- nent experiences the maximal absorbance, and the opposite is true for the perpendicular ... See full document

... mixed with more than 10% cyano-biphenyls, they tend to form 1:1 complexes and limits the solubility of the polar ...LCs with wide nematic range, high Dn, low viscosity, and excellent compatibility ... See full document

... Abstract: Terahertz (THz) spectroscopy is a promising method to measure the spectrum of low-frequency modes of molecules or ensembles, such as crystals and polymers, including ... See full document

... reorientation with the flow of the liquid ...axis with a pretilt ...0兲 with no-slip boundary conditions 共v x = v y = 0 at z = 0 and ...condition with one of the transmission axis in the ... See full document

... tunable terahertz (THz) phase shifters that are based on a sandwiched liquid crystal (LC) cell with indium–tin–oxide (ITO) nanowhiskers (NWhs) as transparent ...agreement with a theoretical ... See full document

... This apparatus can be very small and inexpensive. It is also very con- venient particularly for small size samples. Both of the homeotropic and homogeneous cells have uniform and high contrast under the crossed ... See full document

... The diffusion constant 𝐷 is anisotropic and related to the viscosity and electrical conductivity of the medium [7, 11]. Table 1 reveals that 𝐷 in a homeotropic cell was larger in comparison with that in a ... See full document

... obtained with the LC cell by the spectrum obtained with the vacant cell yielded the magnitude and phase difference of the complex amplitude transmission function of the 5CB ... See full document

... through the fingerprint texture without changing polarization direction because it experiences the ordinary refraction index (n o ) in the fingerprint texture. On the other hand, the V-component (also known as ... See full document