Opto-Electronics Review
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Dielectric and orientational properties of nematogenic 4-n-octyl(4′-cyanophenyl)benzoate
Opto-Electronics Review - Tập 18 - Trang 63-70 - 2009
Experimental studies of the dielectric properties in the nematic and isotropic phases of 4-cyanophenyl-4′-n-octylbenzoate (8CPB) have been performed in the frequency range from 50 kHz to 100 MHz. The relaxation process related to the rotation around the short molecular axis has been analysed. The results obtained have revealed that in the vicinity of the I-N phase transition, the molecular subdiff...... hiện toàn bộ
Numerical analysis of absorption and transmission photoacoustic spectra of silicon samples with differently treated surfaces
Opto-Electronics Review - Tập 19 - Trang 46-50 - 2010
This paper presents results of the photoacoustic (PA) spectral studies, of a series of silicon samples with differently prepared surfaces, in two PA experimental configurations, so-called, absorption and transmission ones. The PA amplitude spectra of the samples indicated existence of the damaged surface layers. In the paper, the two layer mathematical models of a sample with a damaged surface lay...... hiện toàn bộ
Engineering the point spread function of layered metamaterials
Opto-Electronics Review - - 2013
Layered metal-dielectric metamaterials have filtering properties both in the frequency domain and in the spatial frequency domain. Engineering their spatial filtering response is a way of designing structures with specific diffraction properties for such applications as sub-diffraction imaging, supercollimation, or optical signal processing at the nanoscale. In this paper we review the recent prog...... hiện toàn bộ
Crystalline silicon solar cells with high resistivity emitterAbstract The paper presents a part of research targeted at the modification of crystalline silicon solar cell production using screen-printing technology. The proposed process is based on diffusion from POCl3 resulting in emitter with a sheet resistance on the level of 70 Ω/□ and then, shaped by high temperature passivation treatment. The study was focused on a shal... ... hiện toàn bộ
Opto-Electronics Review - - 2009
Temperature dependence of turn-on time delay of semiconductor laser diode: Theoretical analysis
Opto-Electronics Review - Tập 18 - Trang 458-466 - 2010
Temperature dependence of the turn-on time delay (ton) of uncooled semiconductor laser diodes biased below and above threshold is analyzed in presence of data pattern effect. We show that even when the laser is biased at or slightly above threshold, the increase in temperature of operation will lead to increase in the threshold carrier (Nth) and consequently the laser diode will be biased below th...... hiện toàn bộ
Nanophotonic technologies for single-photon devices
Opto-Electronics Review - Tập 18 - Trang 352-365 - 2010
The progress in nanofabrication has made possible the realization of optic nanodevices able to handle single photons and to exploit the quantum nature of single-photon states. In particular, quantum cryptography (or more precisely quantum key distribution, QKD) allows unconditionally secure exchange of cryptographic keys by the transmission of optical pulses each containing no more than one photon...... hiện toàn bộ
THz/sub-THz bolometer based on electron heating in a semiconductor waveguide
Opto-Electronics Review - Tập 18 - Trang 250-258 - 2010
Direct detection THz/sub-THz bolometer is proposed. In it an electromagnetic wave propagates in the bipolar semiconductor waveguide, heats electrons and holes there, and therefore creates their bipolar thermodiffusion flow and, as well as, the electromotive force (emf). The flow causes the carrier excess concentration. Both this concentration and emf are used to get the bolometer response voltage....... hiện toàn bộ
Numerical procedures and their practical application in PV modules analyses. Part I: air mass
Opto-Electronics Review - Tập 27 - Trang 39-57 - 2019
Selected polymers on CW and pulsed THz investigations
Opto-Electronics Review - Tập 20 - Trang 335-339 - 2012
The paper gives the results of refractive indexes for three plastic materials: polyethylene, polymethyl methacrylate and polyvinyl chloride, which are measured and compared in two arrangements - a CW THz photomixer and a pulsed THz spectrometer.
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