Abstract

A dimer nanohole array is proposed for in situ characterization of radiation damages in spin transfer torque random access memory (STT-RAM) multilayer structures. The structure supports a Fano resonance, which is about twice as sensitive to the refractive index changes in the surface layer, compared to the plasmonic mode in single nanohole arrays. A simplified STT-RAM multilayer of air/gold(5 nm)/MgO(10 nm)/gold(60 nm)/quartz substrate is considered as the platform for the dimer nanohole array. Our studies show that regarding the changes in the ultrathin MgO layer, the normalized figure of merit for this structure is up to more than 10 times larger than an array of single nanoholes. Furthermore, an improvement in bulk sensing performance over the array of nanohole heptamers is observed.

© 2019 Optical Society of America

Full Article  |  PDF Article
More Like This
Fano resonances in plasmonic heptamer nano-hole arrays

Akram Hajebifard and Pierre Berini
Opt. Express 25(16) 18566-18580 (2017)

Impact of ordering of gold nanohole arrays on refractive index sensing

Brindhu Malani S and P. Viswanath
J. Opt. Soc. Am. B 35(10) 2501-2508 (2018)

High-sensitivity plasmonic sensor by narrowing Fano resonances in a tilted metallic nano-groove array

Shangtong Jia, Zhi Li, and Jianjun Chen
Opt. Express 29(14) 21358-21368 (2021)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics