Using X-ray Nanoprobe Beamlines to Explore the Unique Emission Mechanisms of Quantum Technology

Tzu-Chi Huang^1,2*, Shang-Wei Ke², Yu-Hao Wu^2,3, En-Rui Wang², Wei-Lon Wei², Yi-Chen Li², Chien-Yu Lee², Bo-Yi Chen², Gung-Chian Yin², Mau-Tsu Tang², Ying-Hao Chu¹, Bi-Hsuan Lin²

¹Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan
²National Synchrotron Radiation Research Center, Hsinchu, Taiwan
³Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan

* Presenter:Tzu-Chi Huang, email:j927528@gmail.com

This study presents a novel method for investigating quantum materials by integrating X-ray excited optical luminescence (XEOL), time-resolved XEOL (TR-XEOL), and the Hanbury-Brown and Twiss (HB-T) interferometer at the Taiwan Photon Source (TPS) 23A X-ray nanoprobe beamline. By leveraging the nano-focused beam's high spatial resolution, the study achieved detailed XEOL mapping, revealing the emission distributions of synthetic micro-diamonds, and obtained localized emission peaks through XEOL spectral analysis. TR-XEOL measurements indicated that the decay lifetime of the micro-diamonds was approximately 16 ns. Furthermore, using the HB-T interferometer, the XEOL spectra were examined to identify single-photon emission characteristics. The study also includes a discussion on recent research conducted on gadolinium gallium garnet (Gd₃Ga₅O₁₂, GGG) wafers at TPS 23A. The results show that X-rays may be able to create materials with single-photon properties.

Keywords: X-ray nanoprobe, X-ray excited optical luminescence, Time-resolved XEOL, Hanbury-Brown and Twiss interferometer, Single-photon sources