title: Improved SERS sensitivity on plasmon-free TiO₂ photonic microarray by enhancing light-matter coupling.
abstract: Highly sensitive surface-enhanced Raman scattering (SERS) detection was achieved on plasmon-free TiO2 photonic artificial microarray, which can be quickly recovered under simulated solar light irradiation and repeatedly used. The sensitive detection performance is attributed to the enhanced matter-light interaction through repeated and multiple light scattering in photonic microarray. Moreover, the SERS sensitivity is unprecedentedly found to be dependent on the different light-coupling performance of microarray with various photonic band gaps, where microarray with band gap center near to laser wavelength shows a lower SERS signal due to depressed light propagation, while those with band gap edges near to laser wavelength show higher sensitivity due to slow light effect.
authors: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P. R. China.
authors: Dianyu
authors: D
authors: Qi
authors: Liujia
authors: L
authors: Lu
authors: Lingzhi
authors: L
authors: Wang
authors: Jinlong
authors: J
authors: Zhang