Abstract

Refractive index (RI) sensors based on localized surface plasmon resonances (LSPR) have attracted lots of attentions due to its potential applications in "point-of-care" clinical devices. In this presentation, we will review the progress in the field of LSPR-based RI sensor. Then LSPR-based RI sensing properties of double-layered gold gratings separated by dielectric gratings were studied. Two-dimensional double-layered gold gratings, named as gold mushroom arrays, show a superior advantage as a LSPR-based RI sensor because their figure of merits can reach 108 as high as the theoretical predicted upper limit for the propagating surface plasmon resonance (PSPR)-based RI sensor. However, such a high FOM is obtained under a detection light with an oblique incident angle which is still not a favorable testing scheme, because it increases the complexity of the system. Therefore, we also proposed another RI sensor based on one-dimensional double layer gold gratings working under normal incidence, which gives a high FOM as well.

© 2015 Optical Society of America

PDF Article  |   Presentation Video

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

Presentation Video

Videos freely accessible in 2020 and available to subscribers starting in 2021.