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Toward single-mode random lasing within a submicrometre-sized spherical ZnO particle film

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Title: Toward single-mode random lasing within a submicrometre-sized spherical ZnO particle film
Authors: Niyuki, Ryo Browse this author
Fujiwara, Hideki Browse this author →KAKEN DB
Ishikawa, Yoshie Browse this author →KAKEN DB
Koshizaki, Naoto Browse this author →KAKEN DB
Tsuji, Takeshi Browse this author →KAKEN DB
Sasaki, Keiji Browse this author →KAKEN DB
Keywords: random laser
zinc oxide
mode control
Issue Date: Mar-2016
Publisher: IOP Publishing
Journal Title: Journal of optics
Volume: 18
Issue: 3
Start Page: 035202
Publisher DOI: 10.1088/2040-8978/18/3/035202
Abstract: We had recently reported unique random laser action such as quasi-single-mode and low-threshold lasing from a submicrometre-sized spherical ZnO nanoparticle film with polymer particles as defects. The present study demonstrates a novel approach to realize single-mode random lasing by adjusting the sizes of the defect particles. From the dependence of random lasing properties on defect size, we find that the average number of lasing peaks can be modified by the defect size, while other lasing properties such as lasing wavelengths and thresholds remain unchanged. These results suggest that lasing wavelengths and thresholds are determined by the resonant properties of the surrounding scatterers, while the defect size stochastically determines the number of lasing peaks. Therefore, if we optimize the sizes of the defects and scatterers, we can intentionally induce single-mode lasing even in a random structure (Fujiwara et al 2013 Appl. Phys. Lett. 102 061110).
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤原 英樹

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