000075777 001__ 75777 000075777 005__ 20200217133052.0 000075777 0247_ $$2doi$$a10.1063/1.5001199 000075777 0248_ $$2sideral$$a103553 000075777 037__ $$aART-2017-103553 000075777 041__ $$aeng 000075777 100__ $$aManjare, M. 000075777 245__ $$aExposing optical near fields of plasmonic patch nanoantennas 000075777 260__ $$c2017 000075777 5060_ $$aAccess copy available to the general public$$fUnrestricted 000075777 5203_ $$aPlasmonic nanosystems are typically used in optical experiments to concentrate electromagnetic energy into sub-wavelength volumes. In this context, metal-dielectric-metal (MDM) nanosystems provide an attractive geometry for achieving strong field enhancement and mode confinement on a few-nanometer scale. Unfortunately, the disadvantage of the MDM configuration can be that the enhanced near fields are confined to the dielectric spacer and are not externally accessible. This limits the suitability of such platforms for applications, where the interaction of light with external nano-objects is desirable, such as sensing, detection, and quantum optics. To expose the enhanced near fields to the environment, we selectively and isotropically etch the gap dielectric layer, which results in patch antennas on thin silicon oxide pedestals. We perform optical sensing experiments and simulations and confirm the sensitivity of the optical near fields to the refraction index change in a small volume. 000075777 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/MAT2014-53432-C5-1-R 000075777 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000075777 590__ $$a3.495$$b2017 000075777 591__ $$aPHYSICS, APPLIED$$b29 / 146 = 0.199$$c2017$$dQ1$$eT1 000075777 592__ $$a1.382$$b2017 000075777 593__ $$aPhysics and Astronomy (miscellaneous)$$c2017$$dQ1 000075777 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000075777 700__ $$aWang, F. 000075777 700__ $$aGutiérrez Rodrigo, S. 000075777 700__ $$0(orcid)0000-0001-6575-168X$$aHarutyunyan, H. 000075777 773__ $$g111, 22 (2017), 221106 [5 pp]$$pAppl. phys. lett.$$tAPPLIED PHYSICS LETTERS$$x0003-6951 000075777 8564_ $$s156551$$uhttps://zaguan.unizar.es/record/75777/files/texto_completo.pdf$$yVersión publicada 000075777 8564_ $$s125508$$uhttps://zaguan.unizar.es/record/75777/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000075777 909CO $$ooai:zaguan.unizar.es:75777$$particulos$$pdriver 000075777 951__ $$a2020-02-17-12:43:25 000075777 980__ $$aARTICLE