Growth improvement of AgGaSe2 single crystal using the vertical Bridgman technique with steady ampoule rotation and its characterization

Babu, G. Anandha; Karunagaran, N.; Ramasamy, Radha Perumal; Ramasamy, P.; Ganesamoorthy, S.; Gupta, P. K.

doi:10.1016/j.jcrysgro.2011.10.039

Cited by 15 publications

(5 citation statements)

References 17 publications

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“…Many flake-like crystals (∼3 mm × 2 mm) could be stripped down from the final product (Figure ). Based on the differential thermal analysis (Figure a,b, Li 2 HgSnSe 4 and Na 2 Hg 3 Sn 2 Se 8 are congruent-melting compounds because they have explicit melting and crystallization temperatures, such as Li 2 HgSnSe 4 (665/653 °C) and Na 2 Hg 3 Sn 2 Se 8 (442/403 °C), which indicates that they have much lower growth temperatures than those of famous IR NLO crystals, such as AgGaSe 2 (857 °C) and LiInSe 2 (915 °C) . Besides, we have also measured the powder XRD patterns after recrystallization and they have similar XRD patterns, further indicating the congruent-melting behavior (Figure S3).…”

mentioning

confidence: 76%

AgGaSe₂-Inspired Nonlinear Optical Materials: Tetrel Selenides of Alkali Metals and Mercury

Gao

Tian

et al. 2022

Chem. Mater.

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High-performance infrared nonlinear optical (IR NLO) materials are crucial devices in tunable IR solid-state lasers, and the functional-group cosubstitution strategy was selected to design and explore outstanding IR NLO crystals. For that reason, taking the famous AgGaSe 2 as the template, five new mercury-based IR NLO selenides, Li 2 HgMSe 4 and Na 2 Hg 3 M 2 Se 8 (M = Si, Ge, Sn), were successfully designed and synthesized through concurrently replacing the cation (Ag + ) and GaSe 4 unit with the alkali metal (Li + or Na + ) and anionic groups (HgSe 4 and MSe 4 ) to optimize crystal structures and performances. All of them exhibit extremely strong powder second-harmonic generation (SHG) responses (3.6−6.0 × commercial AgGaS 2 ) with the essential phase-matching behavior. Note that Li 2 HgSnSe 4 exhibits the largest SHG response (6.0 × AgGaS 2 ) among the known Hg-based chalcogenides without disorder structures, and its millimeter-level single-crystals were successfully grown by the Bridgman method. Theoretical analysis further illustrates that the different arrangement modes of HgSe 4 units offer considerable but distinguishing SHG contributions, such as Li 2 HgMSe 4 (53−55%) and Na 2 Hg 3 M 2 Se 8 (19−23%). This research result highlights the practicability of the functional group cosubstitution-oriented design strategy and Hg-based selenides could be viewed as the optimal system for future exploration of large SHG crystals.

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confidence: 76%

AgGaSe₂-Inspired Nonlinear Optical Materials: Tetrel Selenides of Alkali Metals and Mercury

Gao

Tian

et al. 2022

Chem. Mater.

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“…In recent years there has been a growing interest in the applications of near-and midinfrared optical devices such as sensors, thermal imagers, rangefinders, medical equipment, and recording and information processing devices. Until now, several commercially available nonlinear materials (AgGaS 2 , AgGaSe 2 , CdGeAs 2 , and ZnGeP 2 ) have been typically utilized for these purposes [1][2][3][4][5][6]. However, these compounds no longer completely meet all requirements of a new generation of devices for modern applications.…”

Section: Introductionmentioning

confidence: 99%

Raman- and Infrared-Active Phonons in Nonlinear Semiconductor AgGaGeS4

et al. 2023

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AgGaGeS4 is an emerging material with promising nonlinear properties in the near- and mid-infrared spectral ranges. Here, the experimental phonon spectra of AgGaGeS4 single crystals synthesized by a modified Bridgman method are presented. The infrared absorption spectra are reported. They are obtained from the fitting of reflectivity to a model dielectric function comprising a series of harmonic phonon oscillators. In the Raman spectra, several modes are registered, which were not detected in previous works. The analysis of the experimental vibrational bands is performed on the basis of a comparison with reported data on structurally related binary, ternary, and quaternary metal chalcogenides. The temperature dependence of the Raman spectra between room temperature and 15 K is also investigated.

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“…Till now, important acentric NLO motifs mainly include five categories: (I) octahedral motifs induced by Jahn–Teller distortion, e.g., (TiO 6 ) 8– in KTiOPO 4 , and (NbO 6 ) 7– in LiNbO 3 ; , (II) tetrahedral motifs induced by parallel polar alignment, e.g., (PO 4 ) 3– in KH 2 PO 4 , and (GaS 4 ) 5– in AgGaS 2 ; , (III) planar motifs induced by conjugated π-orbitals, e.g., (B 3 O 6 ) 3– in β-BaB 2 O 4 , and (BO 3 ) 3– in KBe 2 BO 3 F 2 ; , (IV) conical motifs induced by polar lone electron pairs, e.g., (BiO 4 ) 5– in α-BiB 3 O 6 , and (IO 3 ) − in LiIO 3 ; , and (V) chained motifs induced by dipole distortion, e.g., (CON 2 H 4 ) in urea, and (CN) − in CNI. , These basic NLO motifs and their composite groups are further combined to form a rich variety of NLO structures. ,,,,, Accordingly, the macro NLO performance of crystals can be achieved or controlled by proper alignment and assembly of the primitives. , As an important inorganic system, chalcogenides show superiority for advanced NLO materials applied in the mid-infrared (mid-IR, 3–20 μm) region, mainly because of their excellent optical transparency, especially covering two practically important atmospheric windows (3–5 and 8–12 μm). ,− In addition, many chalcogenides exhibit suitable NLO effects and birefringence as mid-IR NLO materials, − which also contain five kinds of NLO motifs above, such as octahedral (TiS 6 ) 8– in TiP 2 S 6 , tetrahedral (GaS 4 ) 5– /(GaSe 4 ) 5– in AgGaS 2 /AgGaSe 2 , , planar (B 3 S 6 ) 3– in LiBaB 3 S 6 , conical (AsS 3 ) 3– in Ag 3 AsS 3 , and chained (CNS) − in CuCNS …”

Section: Introductionmentioning

confidence: 99%

Homoatomic Polychalcogenide Nonlinear Optical Anionic Groups with Ultra-Large Optical Anisotropy

Yao,

Liu,

et al. 2024

J. Am. Chem. Soc.

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Functional assembly of nonlinear optical (NLO) motifs with a large optical anisotropy is vital to the development of advanced NLO and birefringent materials. In this work, we highlight that, in addition to heteroatomic NLO motifs, homoatomic anionic clusters formed by aggregated anions (S, Se, Te) exhibit diverse chain-, ring-, and cage-like chemical structures as well as one-, two-, and three-dimensional motif alignments. The rich structural chemistry enables homoatomic polychalcogenides (HAPCs) to exhibit asymmetric structural features and anisotropic optical properties, with great potential for NLO and birefringent performance. Focusing on totally 55 binary HAPCs A2Q n (n = 2, 3, 4, 5; A = Na, K, Rb, Cs; Q = S, Se, Te) and their ternary analogues, we employ the state-of-the-art first-principles approach to systematically investigate the modulation evolution of their NLO and birefringent properties. Remarkably, Rb2Te3 and Na2TeSe2 exhibit rarely colossal birefringence (>1.0@10 μm) and NLO effects (>20 × AgGaS2), much larger than conventional NLO chalcogenides. Na2Te3 presents the largest birefringence to date (∼3.48@1, 2.72@2, 2.34@10 μm), indicating the unique structural superiority of HAPC in terms of ultra-large birefringence. By mining the intrinsic mechanism, the HAPC anionic groups are identified as novel mid-infrared NLO “material genes”, furnishing unique NLO and birefringent performance for the design of novel optoelectronic materials.

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Growth improvement of AgGaSe2 single crystal using the vertical Bridgman technique with steady ampoule rotation and its characterization

Cited by 15 publications

References 17 publications

AgGaSe₂-Inspired Nonlinear Optical Materials: Tetrel Selenides of Alkali Metals and Mercury

AgGaSe₂-Inspired Nonlinear Optical Materials: Tetrel Selenides of Alkali Metals and Mercury

Raman- and Infrared-Active Phonons in Nonlinear Semiconductor AgGaGeS4

Homoatomic Polychalcogenide Nonlinear Optical Anionic Groups with Ultra-Large Optical Anisotropy

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Growth improvement of AgGaSe2 single crystal using the vertical Bridgman technique with steady ampoule rotation and its characterization

Cited by 15 publications

References 17 publications

AgGaSe2-Inspired Nonlinear Optical Materials: Tetrel Selenides of Alkali Metals and Mercury

AgGaSe2-Inspired Nonlinear Optical Materials: Tetrel Selenides of Alkali Metals and Mercury

Raman- and Infrared-Active Phonons in Nonlinear Semiconductor AgGaGeS4

Homoatomic Polychalcogenide Nonlinear Optical Anionic Groups with Ultra-Large Optical Anisotropy

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Product

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AgGaSe₂-Inspired Nonlinear Optical Materials: Tetrel Selenides of Alkali Metals and Mercury

AgGaSe₂-Inspired Nonlinear Optical Materials: Tetrel Selenides of Alkali Metals and Mercury