Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/76364
Title: Realization of multiphoton lasing from carbon nanodot microcavities
Authors: Zhang, WF
Ni, YQ
Xu, XH 
Lu, W 
Ren, PP
Yan, PG
Siu, CK 
Ruan, SC
Yu, SF 
Issue Date: 2017
Publisher: Royal Society of Chemistry
Source: Nanoscale, 2017, v. 9, no. 18, p. 5957-5963 How to cite?
Journal: Nanoscale 
Abstract: The use of organosilane chains to link carbon nanodots (CDs) through organosilane surface functional groups is proposed to improve the efficiency of multiphoton absorption. As a result, a large absorption coefficient of 1.16 x 10(-6) cm(5) per GW(3) is obtained and four-photon luminescence under 1900 nm excitation is observed from the CDs at room temperature. Furthermore, a CD laser, which demonstrates random lasing under three-photon (i.e. 1400 nm) excitation, can be realized by sandwiching a CD film between a quartz substrate and a dielectric mirror. The formation of strongly confined microcavities, which arise from the non-uniform distribution of refractive indices inside the CD film, is attributed to the realization of lasing emission.
URI: http://hdl.handle.net/10397/76364
ISSN: 2040-3364
EISSN: 2040-3372
DOI: 10.1039/c7nr01101f
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