Broadband studies of the strong mid-infrared nonlinear optical responses of KPSe_6

Synthesis and Characterization of the Rubidium Thiophosphate Rb6(PS5)(P2S10) and the Rubidium Silver Thiophosphates Rb2AgPS4, RbAg5(PS4)2 and Rb3Ag9(PS4)4

“…The ongoing development of nonlinear optical (NLO) crystals used as coherent mid‐IR sources focuses on various classes of materials such as ternary and quaternary metal chalcophosphates 2,3. In case of thiophosphates, the connection between PS 4 ‐tetrahedral building blocks and metal counterions gives rise to a broad structural variety where approximately one third of all known ternary ( A /P/S) and quaternary ( A / M /P/S) ( A = alkali metal, M = metal) structures are acentric and potential nonlinear optical materials 2…”

Ab Initio High-Pressure Study of Semiconductor-Metal Phase Transition of the Chalcogenide Compound KPSe6

“…In the recent past, research on the effect of pressure on structural phase transformations and characteristics of materials by calculations from first principles have attracted much attention since they give an insight into the nature of solid-state theories [1,2], and also assist in determining values of essential parameters for industrial applications [3]. For example, the structural, electrical, and optical properties of group III-V semiconducting compounds have been studied extensively [1,[3][4][5].…”

“…Chalcogenide glasses are based on selenium, tellurium, and the addition of other elements such as arsenic, germanium, antimony, gallium, and potassium [3,25]. ey are well known for their advantages, such as a wide transmittance range (1-12 μm) [3], low intrinsic losses in the mid-IR [26], low phonon energy [27], and the absence of free-carrier effects [3,[28][29][30]. KPSe 6 as a chalcogenide has attracted much interest because of its promising abilities in technological applications such as thin films and optical fibers [3,25,27,30,31].…”

“…ey are well known for their advantages, such as a wide transmittance range (1-12 μm) [3], low intrinsic losses in the mid-IR [26], low phonon energy [27], and the absence of free-carrier effects [3,[28][29][30]. KPSe 6 as a chalcogenide has attracted much interest because of its promising abilities in technological applications such as thin films and optical fibers [3,25,27,30,31]. KPSe 6 crystallizes in the polar orthorhombic space group Pca2 1 [3,26,32].…”

[Ge2S5(S2)]4−, A NLO‐Active Unit Leading to an Asymmetric Structure Discovered in Li2Cs4Ge2S5(S2)Cl2: An Experimental and Theoretical study

“…Nonlinear optical materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] as frequency-converted devices are of great importance in all-solid-state lasers to widen the range of the presentl ight source. IR NLO mateirals [16][17][18][19][20][21][22][23][24][25][26] have attracted more and more attention in laser science and technology fields, which could be applied in civil and military regions including long-term communication, medical diagnose, industry fields, laser guidance, etc. Metal sulfides [27][28][29][30][31] (AgGaS 2 , [32][33][34] LiGaS 2 , [35] BaGa 4 S 7 [36][37][38] etc.)…”