Boonsong SutapunArmote SomboonkaewRatthasart AmritSupanit PorntheeraphatNongluck HoungkamhangToemsak SrikhirinThailand National Electronics and Computer Technology CenterMahidol University2018-09-242018-09-242010-12-01Proceedings of SPIE - The International Society for Optical Engineering. Vol.7853, (2010)0277786X2-s2.0-78651250987https://repository.li.mahidol.ac.th/handle/123456789/28991Surface plasmon resonance (SPR) sensors with spectral interrogation provide a high refractive index resolution, a large dynamic range and a fixed optical detection module. In this work, we propose a new spectral detection unit that uses only one spectrometer to measure the SPR spectrum from multiple sensing spots rapidly and serially without any mechanical movement. This spectral detection unit is designed based on a spatial light modulator (SLM) configured as a programmable optical aperture for the spectrometer. To demonstrate this concept, a five-channel SPR sensor was built based on the proposed multichannel detection unit and we evaluated the device performance using a refractive index test. The average device refractive index resolution was 1.4 × 10-6refractive index units (RIU). © 2010 SPIE.Mahidol UniversityComputer ScienceEngineeringMaterials ScienceMathematicsPhysics and AstronomyConference PaperSCOPUS10.1117/12.870426