Phase front modulation was previously used to refocus light after transmission through scattering media. This process has been adapted here to work in reflection. A liquid crystal spatial light modulator is used to conjugate the phase scattering properties of diffuse reflectors to produce a converging phase front just after reflection. The resultant focused spot had intensity enhancement values...

We demonstrate the mode locking of external-cavity semiconductor lasers by using a saturable Bragg reflector as an external reflector. Output pulses of 1.9 ps were generated from the semiconductor lasers without dispersion compensation. By coupling the output to a standard single-mode filter with a length of 35 m to compensate for the linear chirp, we have achieved mode-locked pulse durations a...

A vertical-external-cavity surface-emitting-laser is demonstrated in the terahertz range, which is based upon an amplifying metasurface reflector composed of a sub-wavelength array of antennacoupled quantum-cascade sub-cavities. Lasing is possible when the metasurface reflector is placed into a low-loss external cavity such that the external cavity—not the sub-cavities—determines the beam prope...

Recently, it was demonstrated that the insertion of TCO layers between the compound cells of tandem cells allows a shift of current generation from the bottom to the top cell [1]. This concept is particularly useful to increase the performance of a-Si:H/μc-Si:H tandem cells. In this paper we analyse experimental and optical modelling results of very different tandem cell structures in order to ...

I KE.LLERMEIER, H., VORBRUGG, H., and PONTOPPIDAN, K.: ’The MBB unfurlable mesh antenna (UMA) design and development’. AIAA 1 lth Communication Satellite Systems Conference, 1986, (3), pp. 8 M 6 4 2 CLARRICOATS, P. I. B., MI, z., BROWN, R. c., POULTON, G. I., and CRONE, G. E.: ‘A reconfigurable mesh reflector antenna’. IEE Conf. Publ. 1989,1, pp. 112-116 3 RAHMAT-SAMII, Y., and LEE, s.: ‘Vector...

The downward discharge of the molten fuel to lower structure assembly could increase pressure drop and degrade coolability assembly. To analyze phenomena, experiments for generation debris bed were conducted as LOF-DT series. Based on in LOF-DT, experiment was with intact blocked component. Parametric study by CFD. position porosity bed. 85% sedimented reflector, 15% nose piece, approximately. ...

This paper studies the temporal characteristics of intelligent reflecting surface (IRS)-based visible light communication (VLC) channel using radiometric concepts. Throughout this study, we account for delays experienced by transmitted power along continuum paths originating at source, passing through IRS, reaching detector. Then, derive impulse response multi-element phase-tunable metasurface ...

The addition of reflectors to solar panels is used increase the intensity sunlight received by so that electrical power generated increases. In adding panels, they must consider various factors be able without having a negative effect on , one which providing cooling system. Therefore, research needed and systems are suitable for overcoming rising temperatures due reflectors. study was conducte...

We show in random matrix theory, microwave measurements, and computer simulations that the mean free path of a medium strength position an embedded reflector can be determined from radiation scattered by system. The are statistics transmission. transmission independent reflector. reflector's found, however, average dwell time for waves incident one side sample.