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Title: Multiphoton upconversion emission from diamond single crystals
Authors: Wang, YF 
Zhang, WF
Lin, CN
Ren, PP
Lu, YJ
Shan, CX
Yu, SF 
Keywords: Diamond single crystals
Upconversion emission
Nonlinear optical absorption
Nonlinear optics
Issue Date: 2018
Publisher: American Chemical Society
Source: ACS applied materials and interfaces, 6 June 2018, v. 10, no. 22, p. 18935-18941 How to cite?
Journal: ACS applied materials and interfaces 
Abstract: Room-temperature upconversion emission up to eight-photon absorption is demonstrated from diamond single crystals under femtosecond laser excitation for the first time. The low concentration of defects and impurities is attributed to the support of free excitons emission at 235 nm. Nonlinear optical properties are also investigated by using an open-aperture Z-scan technique. The corresponding three-, five-, and eight-photon absorption coefficients of the diamonds are found to be 1.8 x 10(-2) cm(3)/GW(2), 5 x 10(-9) cm(7)/GW(4), and 1.6 x 10(-19) cm(13)/GW(7), respectively. Considering its high hardness and high thermal conductivity, diamonds are a versatile nonlinear optical material suitable for high-power deep ultraviolet applications under multiphoton excitation.
ISSN: 1944-8244
EISSN: 1944-8252
DOI: 10.1021/acsami.8b07288
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