An Inverted Honeycomb Plasmonic Lattice as an Efficient Refractive Index Sensor.

ABSTRACT: We present an efficient refractive index sensor consisting of a heterostructure that contains an Au inverted honeycomb lattice as a main sensing element. Our design aims at maximizing the out-of-plane near-field distributions of the collective modes of the lattice mapping the sensor surroundings. These modes are further enhanced by a patterned SiO2 layer with the same inverted honeycomb lattice, an SiO2 spacer, and an Au mirror underneath the Au sensing layer that contribute to achieving a high performance. The optical response of the heterostructure was studied by numerical simulation. The results corresponding to one of the collective modes showed high sensitivity values ranging from 99 to 395 nm/RIU for relatively thin layers of test materials within 50 and 200 nm. In addition, the figu

SUBMITTER: Rodriguez-Alvarez J 

PROVIDER: S-EPMC8147928 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature