Orthogonally Polarized Luminescence of Single Bismuth Phosphate Microcrystal Doped with Europium. Issue 17 (25th May 2020)

• Record Type: Journal Article
• Authors: Li, Peng; Li, Feng; Zhang, Xiaoyu; Li, Yiming; Luo, Xiaoxuan; Wang, Ruimin; Cai, Yin; Zhang, Yanpeng
• Is Part Of: Advanced optical materials. Volume 8:Issue 17(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-05-25
• Subjects: linearly polarized emission -- micro/nanosized emitters -- rare‐earth ions -- single micro/nanocrystals; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202000583
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Rare‐earth‐doped micro/nanocrystals are significant candidates for nanophotonic and quantum information elements. Nevertheless, the polarization of light emission, which serves as one of the most widely adopted optical information carriers, has been rarely studied in such micro/nanocrystals due to the random crystalline orientation of the ensemble cluster as grown. Herein the polarization‐resolved spectroscopy on a single europium‐doped bismuth phosphate (BiPO4 :Eu) microcrystal is performed, and a series of partially linearly polarized emission in the visible spectrum is observed, which can be grouped into orthogonal pairs. Such emission features are well explained by a phenomenological model of group theory that gives rise to the existence of optical C2 axes induced by local symmetry breaking. Such a polarization detection provides a neat optical method to distinguish single micro/nanocrystals from clusters, and confirms the tunable polarization features by selecting the suitable single microcrystal and engineering its orientation of crystalline axis. The rare‐earth‐doped single micro/nanocrystals, with precise positioning technique realized, can promisingly serve as controllable polarization devices on integrated photonic circuits. Abstract : Each europium‐doped bismuth phosphate microcrystal independently emits a series of orthogonally polarized light in the visible spectrum, which provides a unique optical method to identify the single micro/nanocrystals from clusters or powders. The polarization states of the single microcrystal can be adjusted by engineering its axis orientation, which can be used on photonic chips or for environment micro/nanosensors.