Abstract
Surface-plasmon resonance (SPR), which results from the strong sensitivity of the plasmon-propagation constant to the permittivity of a nanoscale layer of material on a metal surface, is an exquisitely sensitive technique to detect chemical and biochemical changes occurring between molecules. In this work, we propose and demonstrate an SPR sensor based on a multi-angle tilted fiber Bragg grating (TFBG) coated by a 50 nm-thickness gold film for refractive index (RI) measurement. Experimental results show that wide range of RI, from 1.15 to 1.43, can be detected using the proposed SPR sensor, with sensitivity of 523.41 nm/RIU (refractive index unit). In addition, with designed as a probe, through coating a gold film as a reflection mirror in the cleaved end downstream of the grating, the length of the entire sensor is only 2 cm, making it easy to insert into the media for biochemical measurements.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
