Absorptance enhancement in fs-laser-treated CVD diamond

被引：13

作者：

Calvani, Paolo ^{[1
]}

Bellucci, Alessandro ^{[1
,2
]}

Girolami, Marco ^{[1
]}

Orlando, Stefano ^{[3
]}

Valentini, Veronica ^{[1
]}

Polini, Riccardo ^{[4
]}

Trucchi, Daniele M. ^{[1
]}

机构：

[1] CNR, Unit Montelibretti, ISM, I-00015 Rome, Italy

[2] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[3] CNR, Unit Potenza, ISM, Zona Ind, I-85050 Potenza, Italy

[4] Univ Roma Tor Vergata, Dipartimento Sci & Tecnol Chim, I-00133 Rome, Italy

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2015年 / 212卷 / 11期

关键词：

chemical vapour deposition; diamond; optical absorption; photon-enhanced thermionic emission; surface texturing; FEMTOSECOND; SURFACES; SILICON;

D O I：

10.1002/pssa.201532189

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface texturing by fs-laser pulses has been performed in order to enhance optical absorptance of chemical vapour deposited diamond. The induced surface structures have been studied as a function of treatment dose D. Periodic structure with ripples of 170 nm has been observed for a D = 5.0 kJ cm(-2), although not well defined texturing and damaged structures have been obtained for both lower and higher doses. Raman investigations point out negligible changes in crystal bulk for all investigated samples, thus suggesting that physical properties of the crystal were not changed by the treatment. Optical absorptance is strongly enhanced by fs-laser texturing and it is an increasing function of the treatment dose. The absorptance of solar spectrum saturates up to values larger than 90%. The obtained outstanding enhancement of photon absorption represents a preliminary and promising step for the exploitation of synthetic diamond in future high-efficient conversion devices for solar concentration based on photon-enhanced thermionic emission effect. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：2463 / 2467

页数：5

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