Work

Continuous-wave 148.4-nm generation in top-seeded solution-grown strontium tetraborate

Year: 2026

Type: preprint

Abstract: We report an implementation of continuous-wave (CW) vacuum-ultraviolet (VUV) generation at 148.4 nm by single-pass second-harmonic generation of 296.8 nm light in strontium tetraborate (SBO). At an incident fundamental power of approximately 580~mW, we estimate a VUV output power of approximately 1.7 nW at the crystal exit. The crystal is grown by the top-seeded solution growth method and operated in a helium-filled chamber. The quadratic power dependence observed under vacuum, together with its strong suppression in air, supports the identification of the generated second harmonic. We further characterize the dependence of the VUV signal on beam position, incidence angle, polarization, and crystal temperature, providing practical guidance for SBO-based CW VUV sources for nuclear spectroscopy and clock applications.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.06477

Authors: Wu, Yanzhang, Yang, Peng, Yan, Lingfeng, Xiao, Qi, Li, Jiahong, Li, Juxian, Huang, Beichen, Jiao, Zhiwei, Ding, Shiqian

Institutions: State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, North China University of Technology

Language: English

Topic: Photorefractive and Nonlinear Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Tsinghua University, Beijing Science and Technology Planning Project

Awards: G2298691400, G5107613872, G5119131878

OpenAlex ID: W7220731704

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