title: High surface plasmon resonance sensitivity enabled by optical disks.
abstract: We report a systematic, experimental, and theoretical investigation on the surface plasmon resonance (SPR) sensing using optical disks with different track pitches, including Blu-ray disk (BD), digital versatile disk (DVD), and compact disk (CD). Optical reflection measurements indicate that CD and DVD exhibit much higher SPR sensitivity than BD. Both experiments and finite-difference time-domain simulations reveal that the SPR sensitivity is significantly affected by the diffraction order of the SPR peaks and higher diffraction order results in lower sensitivity. Numerical simulations also show that very high sensitivity (∼1600  nm per refractive index unit) is achievable by CDs.
authors.affiliation: Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, USA.
authors.forename: Xuan
authors.initials: X
authors.lastname: Dou
authors.forename: Blayne M
authors.initials: BM
authors.lastname: Phillips
authors.forename: Pei-Yu
authors.initials: PY
authors.lastname: Chung
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
mesh_terms: D016249:Optical Storage Devices; D020349:Surface Plasmon Resonance / Q000295:instrumentation*