Nonlinear, dispersive, and phase-matching properties of the new chalcopyrite CdSiP_2 [Invited]

Abstract

We compare the nonlinear and dispersive properties of the recently discovered mid-infrared nonlinear crystal CdSiP 2 with other chalcopyrite materials to establish its potential for super-continuum generation through a second-order nonlinear process.

Growth of CdSiP2 single crystals by self-seeding vertical Bridgman method

“…In 2010, Zawilski and Schunemann reported the growth of a large crack-free CdSiP 2 single crystal with dimensions of 70 Â 25 Â 8 mm 3 grown for the first time using the transparent horizontal gradient freezing method. This result demonstrated that large single crystal CdSiP 2 can be grown from the melt [29], and the nonlinearity, and phase matching properties of the crystal has been studied in following papers [30,31]. In this paper, for the first time, to the best of our knowledge, we report the synthesis of high purity polycrystalline CdSiP 2 in a single-temperature zone furnace and the growth of single crystal CdSiP 2 with a diameter of 8 mm, and a length of 40 mm using the vertical Bridgman method.…”

The Rise of Infrared Nonlinear Optical Pnictides: Advances and Outlooks

“…But over the past few decades, most of the research in this field is concentrated in the non‐centrosymmetric metal chalcogenides, [6] which results in many IR‐NLO chalcogenides with excellent comprehensive properties, such as BaGa 4 S 7 , [7] BaGa 4 Se 7 , [8] SnGa 4 S 7 , [9] Sn 2 Ga 2 S 5 , [10] Hg 3 P 2 S 8 , [11] γ‐NaAsSe 2 , [12] Li 2 CdGeS 4 , [13] α‐Li 2 ZnGeS 4 , [14] La 4 InSbS 9 , [15] Na 2 ZnGe 2 S 6 , [16] CsGa 2 SnSe 6 , [17] Li 2 ZnSiS 4 , [18] Li 2 BaGeS 4 , [19] CuHgPS 4 , [20] BaHgGeSe 4 , [21] Sr 5 ZnGa 6 S 15 , [22] [Li 2 Cs 2 Cl][Ga 3 S 6 ], [23] [Rb 3 Br][PGa 3 S 8 ], [24] [CsBa 2 Cl][Ga 4 S 8 ], [25] [Ba 4 Cl 2 ][ZnGa 4 S 10 ] [26] and so on and so forth. Compared with a large number of research results in IR‐NLO chalcogenides, only a few IR‐NLO pnictides are discovered in this area [28–61] and the major research works are still focused on classical binary or ternary semiconductors, such as GaAs, [27] ZnGeP 2 , [5] CdSiP 2 [7] and CdGeAs 2 [29] . Generally, pnictides exhibit small band gaps (E g <2.5 eV) and are difficult to synthesize, which limit their development in the IR‐NLO field.…”

Carrier transport and electron–lattice interactions of nonlinear optical crystals CdGeP2, ZnGeP2, and CdSiP2

“…There is still much to understand about models of conduction and their effect at THz frequencies, which requires application of THz-TDS to bulk crystals without contacts or other forms of device processing. One material class that has been interesting to the optics community is II-IV-V2 chalcopyrite crystals due to their high nonlinearity, composition-tunable band gaps, wide transparency windows and high damage threshold [12][13][14][15]. Chalcopyrite crystals have been explored for electromagnetic (EM) screening, spintronic [16,17], and photovoltaic applications [18], making them good as optical and optoelectronic materials.…”