In this paper, we propose and analytically demonstrate a novel photonic crystal metallic structure, where a photonic crystal (PC) structure is integrated in a total-internal-reflection (TIR) geometry. This unique configuration introduces a new plasmon excitation mechanism, and the excited plasmon modes satisfy the conditions for both resonance modes in PC structure and Plasmon modes in the metallic structure, which makes it possesses a narrow resonance width, smaller minimum reflectance and higher sensitivity comparing with the conventional SPR sensor. The novel and sensitive PC-metallic biosensor will serve as a promising choose for optical biosensing, and in enhanced total-internal-reflection fluorescence microscopy (TIRFM).

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91578E (2 June 2014); doi: 10.1117/12.2059592

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)