Title :
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
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;
Conference_Titel :
Optoelectronic and Microelectronic Materials & Devices (COMMAD), 2012 Conference on
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4673-3047-3
DOI :
10.1109/COMMAD.2012.6472419
