標題: Tuning visible-wavelength spectrum of white-light super-continuum via etalon transmission in lamellar ZnO micro/nanoparticle-stacked structures
作者: Hu, Po-Sheng
Chen, Guan-Lin
Wu, Cheng-En
光電系統研究所
影像與生醫光電研究所
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
關鍵字: Etalon transmission;Zinc oxide;Sphere-stacked;Micro/nanostructures;Silver seed layer;Spectral modulation
公開日期: 1-十月-2019
摘要: Multi-layered micro/nanostructures enable the fine-tuning of spectral bandwidth induced by coherent interference of multi-scattering and refraction bounded by a motive of Fabry Perot etalon. In this paper a ZnO micro/nanostructured thin film device is grown on a 21 nm silver film-sputtered sapphire substrates (0001) and attempted to be complied as a transmission-mode white-light spectrum tuning device. In details, the growth of the structures as a function of temporal duration and the effects of deposition of a 21 nm silver film atop sapphire substrates to the structural and optical properties of ZnO structures are investigated. Results of SEM imaging reveals that the insertion of the silver film enables synthesis of round ZnO particles at micro or nanoscales depending on the duration of growth time as opposed to the floral pattern associated with plain sapphire substrates. Characterizing material crystallization by XRD spectra found one dominant and two minor peaks along the planes of crystallization (002), and (100) and (101), correspondingly. Also, the characteristic PL peak at 380 nm was confirmed when excited at 325 nm, and the intensity decreases as the duration of growth time increases. Finally, growth duration-dependent modulation of peak wavelength and spectral bandwidth of the continuum laser was demonstrated.
URI: http://dx.doi.org/10.1016/j.optmat.2019.109337
http://hdl.handle.net/11536/153367
ISSN: 0925-3467
DOI: 10.1016/j.optmat.2019.109337
期刊: OPTICAL MATERIALS
Volume: 96
起始頁: 0
結束頁: 0
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