Surface-enhanced Raman scattering sensor based on laser nano-textured surfaces

Author

Buividas, R. ; Fahim, N.F. ; Stoddart, Paul R. ; Juodkazis, Saulius

Author_Institution

Centre for Micro-Photonics, Swinburne Univ. of Technol., Hawthorn, VIC, Australia

fYear

2012

fDate

12-14 Dec. 2012

Firstpage

179

Lastpage

180

Abstract

Nano-textured surfaces of dielectric materials were prepared by laser ablation using femtosecond laser pulses. The ripples with periods 170-270 nm were prepared on several substrates: SiC, Al₂O₃, GaP, glass and synthetic diamond. Gold and silver coated surfaces were used to detect surface enhanced Raman scattering (SERS) of chemically and physically adsorbed molecules of thyophenol and rhodamine. Polarization sensitivity of ripple sensors was measured for irradiation by linearly polarized light. The limit of detection of SERS substrate was found one order of magnitude higher as compared with commercial Klarite and Solas substrates.

Keywords

III-V semiconductors; gallium compounds; laser ablation; nanosensors; optical sensors; silicon compounds; surface enhanced Raman scattering; wide band gap semiconductors; Al₂O₃; GaP; Klarite substrates; SERS detection; SERS substrate; SiC; SiO₂; Solas substrates; dielectric materials; femtosecond laser pulses; gold coated surfaces; laser ablation; laser nanotextured surfaces; linearly polarized light; rhodamine chemically adsorbed molecules; rhodamine physically adsorbed molecules; ripple sensor polarization sensitivity; silver coated surfaces; surface enhanced Raman scattering detection; surface-enhanced Raman scattering sensor; synthetic diamond; thyophenol chemically adsorbed molecules; thyophenol physically adsorbed molecules; Chemical lasers; Gold; Measurement by laser beam; Optical surface waves; Substrates; Surface emitting lasers; Surface treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Optoelectronic and Microelectronic Materials & Devices (COMMAD), 2012 Conference on

Conference_Location

Melbourne, VIC

ISSN

1097-2137

Print_ISBN

978-1-4673-3047-3

Type

conf

DOI

10.1109/COMMAD.2012.6472419

Filename

6472419