[1] Gmachl C, Capasso F, Kohler R, et al. Mid-infrared tunable quantum cascade lasers for gas-sensing applications［J］.IEEE Circuits & Devices,2000,16(3): 10-18.

[2] Capasso F, Paiella R, Martini R, et al. Quantum cascade lasers: ultrahigh-speed operation, optical wireless communication, narrow linewidth, and far-infrared emission［J］.IEEE Journal of Quantum Electronics,2002,38(6): 511-532.

[3] Fan W, Zhang S, Panoiu N C, et al. Second harmonic generation from a nanopatterned isotropic nonlinear material［J］.Nano Letters,2006,6(5): 1027-1030.

[4] Guo S P, Chi Y, Guo G C. Recent achievements on middle and far-infrared second-order nonlinear optical materials［J］.Coordination Chemistry Reviews,2017,335: 44-57.

[5] Fan Y X, Eckardt R C, Byer R L, et al. AgGaS2 infrared parametric oscillator［J］.Applied Physics Letters,1984,45(4): 313-315.

[6] Eckardt R C, Fan Y X, Byer R L, et al. Broadly tunable infrared parametric oscillator using AgGaSe2［J］.Applied Physics Letters,1986,49(11): 608-610.

[7] Vodopyanov K L, Ganikhanov F, Maffetone J P, et al. ZnGeP2 optical parametric oscillator with 3.8-12.4 μm tunability［J］.Optics Letters,2000,25(11): 841-843.

[8] Akiko H, Kiyoshi K. New data on the nonlinear optical constant, phase-matching, and optical damage of AgGaS2［J］.Japanese Journal of Applied Physics,1997,36(2): 700-703.

[9] Catella G C, Shiozawa L R, Hietanen J R, et al. Mid-IR absorption in AgGaSe2 optical parametric oscillator crystals［J］.Applied Optics,1993,32(21): 3948-3951.

[10] Budni P A, Pomeranz L A, Lemons M L, et al. Efficient Mid-infrared laser using 1.9 μm-Pumped Ho∶YAG and ZnGeP2 optical parametric oscillators［J］.Journal of the Optical Society of America B,2000,17(5): 723-728.

[11] Isaenko L, Vasilyeva I, Merkulov A, et al. Growth of new nonlinear crystals LiMX2 (M=Al, In, Ga; X=S, Se, Te) for the mid-IR optics［J］.Journal of Crystal Growth,2005,275(1-2): 217-223.

[12] Lin X, Guo Y, Ye N. BaGa2GeX6 (X=S, Se): new Mid-IR nonlinear optical crystals with large band gaps［J］.Journal of Solid State Chemistry,2012,195(52): 172-177.

[13] Lin X, Zhang G, Ye N. Growth and characterization of BaGa4S7: a new crystal for mid-IR nonlinear optics［J］.Crystal Growth & Design,2009,9(2): 1186-1189.

[14] Yao J, Mei D, Bai L, et al. BaGa4Se7: A new congruent-melting IR nonlinear optical material［J］.Inorganic Chemistry,2010,41(50): 9212-9216.

[15] Yelisseyev A P, Isaenko L I, Krinitsin P, et al. Crystal growth, structure, and optical properties of LiGaGe2Se6［J］.Inorganic Chemistry,2016,55(17): 8672-8680.

[16] Kemlin V, Boulanger B, Petrov V, et al. Nonlinear, dispersive, and phase-matching properties of the new chalcopyrite CdSiP2 ［Invited］［J］.Optical Materials Express,2011,1(7): 1292-1300.

[17] Zhu C, Verozubova G A, Mironov Y P, et al. Two-temperature synthesis of nonlinear optical compound CdGeAs2［J］.Journal of Crystal Growth,2016: S0022024816305607.

[18] Skauli T, Vodopyanov K L, Pinguet T J, et al. Measurement of the nonlinear coefficient of orientation-patterned GaAs and demonstration of highly efficient second-harmonic generation［J］.Optics Letters,2002,27(8): 628-630.

[19] Nikogosyan D N. Nonlinear optical crystals a complete survey［M］: New York: Springer Science and Business Media,2005.

[20] Boyd G D, Buehler E, Storz F G. Linear and nonlinear optical properties of ZnGeP2 and CdSe［J］.Applied Physics Letters,1971,18(7): 301-304.

[21] Herbert S, Eisenmann B, Wiking M. Zintl phases: transitions between metallic and ionic bonding［J］.Angewandte Chemie International Edition,1973,12(9): 694-712.

[22] He H, Stearrett R, Nowak E R, et al. BaGa2Pn2 (Pn=P, As): new semiconducting phosphides and arsenides with layered structures［J］.Inorganic Materials,2010,49(17): 7935-7940.

[23] Donohue P C. Synthesis, structure, and superconducting properties of new high-pressure forms of tin phosphide［J］.Inorganic Chemistry,1970,9(2): 335-337.

[24] Goodyear J, Steigmann G A. The crystal structure of α-CdP2［J］.Acta Crystallographica Section B, Structural Science,1969,25(11): 2371-2374.

[25] Morozova V A, Marenkin S F, Semenenya T V, et al. Optical and photoelectric properties of CdAs2 single crystals［J］.Inorganic Materials,1994,41(3): 212-216.

[26] Woo K E, Wang J, Wu K, et al. Mg-Si-As: an unexplored system with promising nonlinear optical properties［J］.Advanced Functional Materials,2018,28(30): 1801589.1-1801589.10.

[27] Yu T, Wang S, Zhang X, et al. MnSiP2: a new mid-IR ternary phosphide with strong SHG effect and ultrabroad transparency range［J］.Chemistry of Materials,2019,31(6): 2010-2018.

[28] Springthorpe A, Harrison J. MgSiP2: a new member of the II-IV-V2 family of semiconducting compounds［J］.Nature,1969,222: 977-977.

[29] Xiao J, Zhu S, Zhao B, et al. Computation assessment of promising mid-infrared nonlinear optical materials Mg-IV-V2 (IV=Si, Ge, Sn; V=P, As): a first-principles study［J］.Materials Research Express,2018,5: 035907.

[30] Feng K, Yin W, He R, et al. NaGe3P3: a new ternary germanium phosphide featuring an unusual ［Ge3P7］ ring［J］.Dalton Transactions,2012,41(2): 484-489.

[31] Chen J, Lin C, Peng G, et al. BaGe2Pn2 (Pn=P, As): two congruent-melting non-chalcopyrite pnictides as mid- and Far-infrared nonlinear optical materials exhibiting large second harmonic generation effects［J］.Chemistry of Materials,2019,31(24): 10170-10177.

[32] Mark J, Wang J, Wu K, et al. Ba2Si3P6: 1D nonlinear optical material with thermal barrier chains［J］.Journal of the American Chemical Society,2019,141(30): 11976-11983.

[33] Pan M, Ma Z, Liu X, et al. Ba4AgGa5Pn8 (Pn=P, As): new pnictide-based compounds with nonlinear optical potential［J］.Journal of Materials Chemistry C,2015,3(37): 9695-9700.