Photorefraction in tin hypothiodiphosphate in the near infrared

Thermal expansion of Pb2P2Se6 crystals

“…Pb 2 P 2 Se 6 crystals are representatives of a family of wide-gap, low-symmetry semiconductors with a general formula (Sn 1-y Pb y ) 2 P 2 (Se x S 1-x ) 6 [1,2]. Tin-containing solid solutions Sn 2 P 2 (Se x S 1-x ) 6 undergo a proper paraelectric-to-ferroelectric phase transition, with the change of point symmetry group 2/m F m. Besides, the mixed crystals with a predominant concentration of selenium manifest an incommensurately modulated phase between their paraelectric and ferroelectric phases [1,2].…”

“…Tin-containing solid solutions Sn 2 P 2 (Se x S 1-x ) 6 undergo a proper paraelectric-to-ferroelectric phase transition, with the change of point symmetry group 2/m F m. Besides, the mixed crystals with a predominant concentration of selenium manifest an incommensurately modulated phase between their paraelectric and ferroelectric phases [1,2]. Pure Pb 2 P 2 S 6 and Pb 2 P 2 Se 6 crystals exhibit no structural phase transitions down to liquidhelium temperature and belong to the point symmetry group 2/m.…”

“…Crystals of (Sn 1-y Pb y ) 2 P 2 (Se x S 1-x ) 6 family can be efficiently used in different branches of optoelectronics. At least, Sn 2 P 2 S 6 is known as efficient electrooptic [3][4][5] and photorefractive [6,7] material.…”

“…At least, Sn 2 P 2 S 6 is known as efficient electrooptic [3][4][5] and photorefractive [6,7] material. Its electrooptic coefficient ( 6 ). This hinders applications due to possible temperature variations of working parameters caused by tricritical temperature behaviour.…”

Acoustooptic figure of merit for Sn2P2S6 crystals and the temperature dependences of acoustic wave velocities

“…These crystals are widely known as an excellent photorefractive and electrooptic material [2][3][4][5]. In our recent works [6][7][8][9] we have studied and analysed acoustic properties of Sn 2 P 2 S 6 crystals at the room temperature, thus demonstrating that the material has great potential for acoustooptic (AO) applications.…”