Deep UV nonlinear optical crystal:RbBe_2(BO_3)F_2

Chen, Chuangtian; Luo, Siyang; Wang, Xiaoyang; Wang, Guiling; Wen, Xin; Wu, Huaxing; Zhang, Xin; Xu, Zuyan

doi:10.1364/josab.26.001519

Cited by 168 publications

(124 citation statements)

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“…Cs 2 B 4 SiO 9 exhibits the framework structure formed from two main units ( Fig (Figure 1 c). The Cs1 atom was coordinated by ten oxygen atoms with Cs À O bond lengths ranging from 3.150(2) to 3.324 (5) . The Cs2 atom is 12-coordinated by oxygen atoms, and the CsÀO bonds vary from 3.221(3) to 3.547(2) (see the Supporting Information).…”

Section: +mentioning

confidence: 99%

“…However, for a noncentrosymmetric (NCS) crystal to be used as a nonlinear optical material the essential crystal property requirements are that the crystals possess a large NLO response, wide transparent window, suitable birefringence for phase-matching, good mechanical strength, and chemical stability. [4,5] After continuous efforts over several decades, many NCS compounds were obtained by incorporating functional borate structure units, such as B 3 O 6 and B 3 O 7 . b-BaB 2 O 4 (BBO) [6] and LiB 3 O 5 (LBO) [7] are the most advanced NLO materials, which have widely been used as optoelectronic devices.…”

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confidence: 99%

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Cs₂B₄SiO₉: A Deep‐Ultraviolet Nonlinear Optical Crystal

et al. 2013

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The generation of deep-ultraviolet (UV) coherent light from nonlinear optical (NLO) materials [1][2][3][4] as one of the most promising resource, has become a topic of intensive study because of its important applications in a broad range of fields, such as semiconductor photolithography, laser micromachining, photochemical synthesis, and material processing. They are able to shorten the wavelength of light by a factor of two (or doubling the frequency), based on the process of second-harmonic generation (SHG), which occurs only when a centrosymmetric symmetry operation is absent in a crystal. However, for a noncentrosymmetric (NCS) crystal to be used as a nonlinear optical material the essential crystal property requirements are that the crystals possess a large NLO response, wide transparent window, suitable birefringence for phase-matching, good mechanical strength, and chemical stability. [4,5] After continuous efforts over several decades, many NCS compounds were obtained by incorporating functional borate structure units, such as B 3 O 6 and B 3 O 7 . b-BaB 2 O 4 (BBO) [6] and LiB 3 O 5 (LBO) [7] are the most advanced NLO materials, which have widely been used as optoelectronic devices. However, to date, KBe 2 BO 3 F 2 (KBBF) [8,9] is the only material that can generate coherent light wavelengths below 200 nm by direct SHG, which makes KBBF a research hotspot. Unfortunately, the KBBF crystal is very difficult to grow in thickness owing to the growth habit of the layer, which severely limits the coherent light output power. Thus, finding the optimal composition that is facile to synthesize, yields large single crystals, and simultaneously satisfies the NLO requirements has attracted considerable attention. [10,11] The presence of large NLO coefficients in a structure is usually in contradiction with wide band gaps in one compound. For instance, the structural units in the known compounds are second-order Jahn-Teller (SOJT) polar dis- [17] which combine with diverse other functional building units to produce materials with large NLO coefficients, for example, Cd 4 BiO-(BO 3 ) 3 (6 KDP), [18] Pb 2 B 5 O 9 I (13.5 KDP), [19] and Ba 23 Ga 8 Sb 2 S 38 (22 AgGaS 2 ).[20] However, the structural units produce an unwanted effect-the UV absorption edge shifts toward the red region, making them less suitable for the deep-UV applications. It is necessary to create the subtle balance of above-mentioned conflicting factors so as to search for the new deep-UV NLO crystals with excellent comprehensive performances.To circumvent the wide absorption window requirement, basic structural units having excitation energies near the UV region are necessary. Such units are BO 3 , BO 4 , SiO 4 , and PO 4 . [6,7,21] A compound Rb 2 Be 2 Si 2 O 7 [22] was ever expected to be a substitution for KBBF owing to its similar structure characteristics with KBBF and without the layer habit. But, the weak SHG response of Rb 2 Be 2 Si 2 O 7 makes the substitution end in naught. However, the borosilicate may be a potential candidate for a deep-...

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Section: +mentioning

confidence: 99%

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confidence: 99%

Cs₂B₄SiO₉: A Deep‐Ultraviolet Nonlinear Optical Crystal

et al. 2013

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“…The fluoride borate crystals KBe2BO3F2 (KBBF), RbBe2BO3F2 (RBBF), CsBe2BO3F2 (CBBF) and TlBe2BO3F2 (TBBF) have the trigonal D3-point symmetry (R32) [120][121][122]. The fluoride borate crystal, Sr3[(BexB1-x)3O10][Be(O1-xFx)3], x = 0.33, has its polar trigonal C3v point symmetry, while some other crystals (BaAlBO3F2, C3h, Ba7(BO3)4−xF2+3x, C6, Sr2Be2B2O7, D3h, NaBeBO3, D3h)-the hexagonal structure [124][125][126][127][128]. According to their oxide bond length, the borate and fluoride borate crystals with the moderate χ (2) -level are positioned in regions 1-2 or 7 ( Figures 16 and 17).…”

Section: Interrelationship "Composition-structure-oxide Bond Length-nmentioning

confidence: 99%

“…Chen and others [14,15], and the crystal growth technology was developed in many studies [117][118][119]. Earlier, and for the last years, some deep UV borate and fluoride-borate crystals have been grown [120][121][122][123][124][125][126]. These crystals expanded the possible boundary of transparence in the UV spectral region in comparison with borate crystals, and the essential part of these contributions was carried out by the Chen's group and other scientists [14,15,101,[120][121][122][123][124][125][126][127][128][129][130] 3 ], x = 0.33, has its polar trigonal C 3v point symmetry, while some other crystals (BaAlBO 3 F 2 , C 3h , Ba 7 (BO 3 ) 4−x F 2+3x , C 6 , Sr 2 Be 2 B 2 O 7 , D 3h, NaBeBO 3 , D 3h )-the hexagonal structure [124][125][126][127][128].…”

Section: Interrelationship "Composition-structure-oxide Bond Length-nmentioning

confidence: 99%

Comparative Interrelationship of the Structural, Nonlinear-Optical and Other Acentric Properties for Oxide, Borate and Carbonate Crystals

Kidyarov

2017

Crystals

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Abstract:The structure and the maximal nonlinear optical (NLO) susceptibility χ (2) are tabulated for more 700 acentric binary oxides, 220 crystals of simple, binary and complex borates and for the same set of 110 carbonates, tartrates, formates, oxalates, acetates and fluoride-carbonates used in ultraviolet and deep ultraviolet optoelectronics. According to the chemical formula, the structural symbols of these crystals have been plotted on the plane of two minimal oxide bond lengths (OBL). It is shown that acentric crystals are positioned on such plane inside the vertical, horizontal and slope intersected ellipses of "acentricity". The oxide and borate crystals with moderate NLO susceptibility are found in the central parts of these ellipses intersection and, with low susceptibility, on top, at the bottom and border of the ellipses rosette. The nonpolar fluoride-carbonate crystals with high NLO susceptibility are found in the curve-side rhombic parts of the slope ellipse of "acentricity". The unmonotonous fuzzy dependence "χ (2) " on the OBL of these crystals is observed, and their clear-cut taxonomy on compounds with π-or σ-oxide bonds is also established. It is shown that the correlations of χ (2) with other acentric properties are nonlinear for the whole set of the oxide crystals having their clear maximum at a certain value of the piezoelectric or electro-optic coefficient. The correlation "hardness-thermoconductivity-fusibility" is plotted for oxide crystals, part of which is used at the creation of self-frequency-doubling solid state lasers.

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“…A list of such crystals, with transparency in the deep-UV, is shown in Table 1. For SHG to 266 nm based on critical phase-matching, β-BaB 2 O 4 (BBO) offers the highest nonlinearity compared to all other birefringent crystals including KBe 2 BO 3 F 2 (KBBF), RbBe 2 BO 3 F 2 (RBBF), K 2 Al 2 B 2 O 7 (KABO), YAl 3 (BO 3 ) 4 (YAB) and CsLiB 6 O 10 (CLBO) [7][8][9][10][11]. Materials such as KBBF and RBBF, while offering lower nonlinearity, are advantageous for direct SHG at wavelengths below 200 nm, as the shortest wavelength that can be generated with SHG in BBO is 205 nm.…”

Section: Introductionmentioning

confidence: 99%

Continuous-wave, single-pass, single-frequency second-harmonic-generation at 266 nm based on birefringent-multicrystal scheme

Devi¹,

Parsa²,

Ebrahim-Zadeh³

2016

Opt. Express

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Abstract:We report the implementation of a compact cascaded multicrystal scheme based on birefringent crystals in critical phasematching, for the generation of continuous-wave (cw) radiation in the deep ultraviolet (UV). The approach comprises a cascade of 4 single-pass second-harmonic-generation (SHG) stages in β-BaB 2 O 4 (BBO) pumped by a single-frequency cw green source at 532 nm. A deep-UV cw output power of 37.7 mW at 266 nm has been obtained with a high passive power stability of 0.12% rms over more than 4 hours. Characterization and optimization of the system in each stage has been systematically performed. Angular phase-matching acceptance bandwidth under tight focusing in BBO, and spectral properties of the deep-UV radiation, have been studied. Theoretical calculations for SHG in the cascaded scheme based on birefringent phase-matching have been performed, and enhancement in UV power compared to single-stage single-pass scheme are studied. Theoretical comparison of BBO with other potential crystals for deep-UV generation in cascaded multicrystal scheme is also presented. 32-34 (1976). 16. J. Reintjes and A. C. Eckardt, "Efficient harmonic generation from 532 to 266 nm in ADP and KD*P," Appl. #260670Phys. Lett. 30(2), 91-93 (1977)

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Deep UV nonlinear optical crystal:RbBe_2(BO_3)F_2

Cited by 168 publications

References 10 publications

Cs₂B₄SiO₉: A Deep‐Ultraviolet Nonlinear Optical Crystal

Cs₂B₄SiO₉: A Deep‐Ultraviolet Nonlinear Optical Crystal

Comparative Interrelationship of the Structural, Nonlinear-Optical and Other Acentric Properties for Oxide, Borate and Carbonate Crystals

Continuous-wave, single-pass, single-frequency second-harmonic-generation at 266 nm based on birefringent-multicrystal scheme

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Deep UV nonlinear optical crystal:RbBe_2(BO_3)F_2

Cited by 168 publications

References 10 publications

Cs2B4SiO9: A Deep‐Ultraviolet Nonlinear Optical Crystal

Cs2B4SiO9: A Deep‐Ultraviolet Nonlinear Optical Crystal

Comparative Interrelationship of the Structural, Nonlinear-Optical and Other Acentric Properties for Oxide, Borate and Carbonate Crystals

Continuous-wave, single-pass, single-frequency second-harmonic-generation at 266 nm based on birefringent-multicrystal scheme

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Cs₂B₄SiO₉: A Deep‐Ultraviolet Nonlinear Optical Crystal

Cs₂B₄SiO₉: A Deep‐Ultraviolet Nonlinear Optical Crystal