Engineering and Technology

High-sensitivity nanophotonic sensors with passive trapping of analyte molecules in hot spots

X. Miao, L. Yan, et al.

Discover how Xianglong Miao and colleagues have revolutionized molecular absorption spectroscopy using innovative nanophotonic sensors. Their design harnesses nano-trenches to capture analyte molecules in high-field regions, leading to unprecedented sensitivity with picogram-level detection of proline and glucose. Dive into the future of enhanced sensor technology!

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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

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