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
OSA Recommended Articles
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 optical transmittance of aluminum ultrathin film with hexagonal nanohole arrays as transparent electrode

Qing Guo Du, Weisheng Yue, Zhihong Wang, Wah Tung Lau, Hengjiang Ren, and Er-Ping Li
Opt. Express 24(5) 4680-4688 (2016)

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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

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

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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