Entangled femtosecond free induction signals in a cadmium sulfide crystal at room temperature

Entangled free induction decay (EFID) femtosecond signals are experimentally observed for the first time at a wavelength of 790 nm in a cadmium sulfide (CdS) crystal in the two-photon absorption (TPA) regime upon excitation by two crossed (angle, 60°) laser beams. The sample emitted two EFID signals simultaneously in opposite directions. The signals were diffracted by nonequilibrium electric polarization gratings induced by two laser beams in accordance with the laws of energy and momentum conservation. The possibility of exciting EFID signals in the three-photon absorption regime is discussed.     

Effective power input into quasi-optical cavity with travelling wave

The open three-mirror cavity with a travelling wave, and reflecting diffraction grating on one mirror as a coupler was excited by a wave beam at the frequency 140 GHz. The investigation showed the wave power in the cavity to be about 30 times higher than that at the cavity entrance.     

Influence of Some Factors on the Stability of KH2РО4 Aqueous Solutions

Crystallography Reports - Some factors affecting the stability of KH2РО4 aqueous solutions have been investigated. The width of the metastable zone of KH2РО4 solutions...