Measurement of second-order nonlinear optical coefficients of BaMgF_4

Chen, Junjie; Chen, Xianfeng; Ma, Yanzhi; Zheng, Yuanlin; Wu, Anhua; Li, Hongjun; Jiang, Linwen; Xu, Jing

doi:10.1364/josab.29.000665

Cited by 15 publications

(1 citation statement)

References 24 publications

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“…The latter is below the low-wavelength cutoffs for generation of UV laser light by nonlinear frequency conversion in workhorse materials β -BaB 2 O 4 (BBO, 182 nm phase matching cutoff 26 ), CsLiB 6 O 10 (CLBO, 180 nm transparency cutoff 27 ), and LiB 3 O 5 (LBO, 160 nm transparency cutoff 28 ). New candidate materials such as KBe 2 BO 3 F 2 (KBBF, 150 nm transparency cutoff 29 ) and BaMgF 4 (BMF, 125 nm transparency cutoff 30 ) are difficult to grow and therefore unavailable commercially with sufficiently high quality. Scaling indirect quantum-logic readout 31 to large Coulomb crystals remains an open challenge 32 .…”

Section: Introductionmentioning

confidence: 99%

Prospects of a thousand-ion Sn2+ Coulomb-crystal clock with sub-10−19 inaccuracy

Leibrandt,

Porsev,

Cheung

et al. 2024

Nat Commun

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Optical atomic clocks are the most accurate and precise measurement devices of any kind, enabling advances in international timekeeping, Earth science, fundamental physics, and more. However, there is a fundamental tradeoff between accuracy and precision, where higher precision is achieved by using more atoms, but this comes at the cost of larger interactions between the atoms that limit the accuracy. Here, we propose a many-ion optical atomic clock based on three-dimensional Coulomb crystals of order one thousand Sn2+ ions confined in a linear RF Paul trap with the potential to overcome this limitation. Sn2+ has a unique combination of features that is not available in previously considered ions: a 1S0 ↔ 3P0 clock transition between two states with zero electronic and nuclear angular momentum (I = J = F = 0) making it immune to nonscalar perturbations, a negative differential polarizability making it possible to operate the trap in a manner such that the two dominant shifts for three-dimensional ion crystals cancel each other, and a laser-accessible transition suitable for direct laser cooling and state readout. We present calculations of the differential polarizability, other relevant atomic properties, and the motion of ions in large Coulomb crystals, in order to estimate the achievable accuracy and precision of Sn2+ Coulomb-crystal clocks.

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Section: Introductionmentioning

confidence: 99%

Prospects of a thousand-ion Sn2+ Coulomb-crystal clock with sub-10−19 inaccuracy

Leibrandt,

Porsev,

Cheung

et al. 2024

Nat Commun

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Borosilicate Crystal LaBSiO₅: A New Promising Ultraviolet Quasiphase Matching Material

Sha

Xiong

et al. 2021

Advanced Optical Materials

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SHG response, but also an appropriate birefringence to achieve the phase matching condition. [5] Besides, that crystal should exhibit excellent stability and good growth habit. However, it is so difficult to satisfy with these conditions simultaneously, due to the mutual restriction between the bandgap, the SHG response, and the birefringence. [6] Thus, new UV/DUV NLO crystals have been exploring, among which inorganic salts, such as borates, silicates, and phosphates, have been favored by researchers, on account of their excellent properties. Up to now, a lot of UV/DUV NLO crystals have been developed, [7] for example, KBe 2 BO 3 F 2 (KBBF), [8] Sr 2 Be 2 B 2 O 7 , [9] Ba 3 P 3 O 10 Cl, [10] and Li 2 BaSiO 4 , [11] while only KBBF crystal could achieve 177 nm coherent output by a direct SHG process. [12] Thus, there is still an urgent requirement for new UV/DUV NLO materials. [13]

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Optical properties and laser-induced damage threshold for Pb(Mg1/3Nb2/3)O3−based ferroelectric crystals

Zhao

Liu

et al. 2022

Ceramics International

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Measurement of second-order nonlinear optical coefficients of BaMgF_4

Cited by 15 publications

References 24 publications

Prospects of a thousand-ion Sn2+ Coulomb-crystal clock with sub-10−19 inaccuracy

Prospects of a thousand-ion Sn2+ Coulomb-crystal clock with sub-10−19 inaccuracy

Borosilicate Crystal LaBSiO₅: A New Promising Ultraviolet Quasiphase Matching Material

Optical properties and laser-induced damage threshold for Pb(Mg1/3Nb2/3)O3−based ferroelectric crystals

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Measurement of second-order nonlinear optical coefficients of BaMgF_4

Cited by 15 publications

References 24 publications

Prospects of a thousand-ion Sn2+ Coulomb-crystal clock with sub-10−19 inaccuracy

Prospects of a thousand-ion Sn2+ Coulomb-crystal clock with sub-10−19 inaccuracy

Borosilicate Crystal LaBSiO5: A New Promising Ultraviolet Quasiphase Matching Material

Optical properties and laser-induced damage threshold for Pb(Mg1/3Nb2/3)O3−based ferroelectric crystals

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Product

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Borosilicate Crystal LaBSiO₅: A New Promising Ultraviolet Quasiphase Matching Material