GST plasmonic gap structure investigation as a switch and sensor.

Autor: Zareizadeh A, Nozhat N
Jazyk: angličtina
Zdroj: Applied optics [Appl Opt] 2023 Aug 10; Vol. 62 (23), pp. 6156-6162.
DOI: 10.1364/AO.497742
Abstrakt: In this paper, a plasmonic perfect absorber that consists of a gold rectangular bar with three gaps is investigated as a switch and sensor in the near-infrared region. Phase change material germanium-antimony-tellurium (GST) is utilized in two gaps to perform the switching capability with a high extinction ratio of 18.49 dB. In addition, the sensing performance of the structure for detection of a solution of glucose in water and diagnosis of different cancer cells is studied. The best sensitivity of 1504 nm/RIU is obtained for detection of the PC12 cancer cell, and the figure of merit of the structure is around 17 R I U -1 .
Databáze: MEDLINE