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Impact of Laser Wavelength on the Optical and Electronic Properties of Black Diamond
Author(s) -
Girolami Marco,
Bellucci Alessandro,
Mastellone Matteo,
Orlando Stefano,
Valentini Veronica,
Montereali Rosa M.,
Vincenti Maria A.,
Polini Riccardo,
Trucchi Daniele M.
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700250
Subject(s) - diamond , laser , materials science , femtosecond , optoelectronics , fluence , wavelength , optics , physics , composite material
Black diamond, obtained by femtosecond laser treatment of natively transparent diamond, is a promising material for solar applications. The enhancement of the interaction between the active material and the solar spectrum is obtained by a controlled texturing of the diamond surface at the nanoscale, the impact of which on the optical and electronic properties of the bulk material is strongly influenced by the laser parameters. In this work, the properties of black diamond samples obtained by using two different laser wavelengths (400 and 800 nm) are compared, showing that texturing periodicity (80 and 170 nm, respectively) is strictly related to the laser wavelength used. Conversely, a unique optimal accumulated absorbed laser fluence (2.10 kJ cm −2 ) demonstrated to return the best results in terms of responsivity in the solar spectrum, regardless of the wavelength used for laser treatment.