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Abstract
Nanophotonic resonators enhance molecular absorption spectroscopy by confining light to subwavelength volumes with amplified near-field intensity. Efficient analyte molecule delivery to these "hot spots" is crucial for maximizing sensor sensitivity. This paper presents a nanophotonic sensor design that passively traps analyte molecules in hot spots during solution evaporation. The design uses nano-trenches within a metal-insulator-metal structure, effectively concentrating precipitated molecules in high-field regions. Picogram-level detection of proline and glucose was demonstrated, highlighting the significantly enhanced sensitivity.
Publisher
Light: Science & Applications
Published On
Jan 05, 2021
Authors
Xianglong Miao, Lingyue Yan, Yun Wu, Peter Q. Liu
Tags
nanophotonic resonators
molecular absorption spectroscopy
analyte delivery
nano-trenches
sensor sensitivity
proline detection
glucose detection

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