Phase resonances induced by a subwavelength particle near a surface with two cavities

It is well known that finite groove gratings with subwavelength features exhibit phase resonances, which are associated with a particular distribution of the magnetic field phase within the cavities and are characterized by a significant enhancement of the internal field. For a flat surface with ide...

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Detalles Bibliográficos
Autores principales: Valencia, C., Skigin, D.C.
Formato: JOUR
Materias:
Molecular physics
Flat surfaces
Groove gratings
Internal field
Normal incidence
Particular distribution
Phase resonances
Sensing devices
Sub-wavelength
Resonance
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_1559128X_v54_n25_p7679_Valencia
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_1559128X_v54_n25_p7679_Valencia
record_format dspace
spelling todo:paper_1559128X_v54_n25_p7679_Valencia2023-10-03T16:26:08Z Phase resonances induced by a subwavelength particle near a surface with two cavities Valencia, C. Skigin, D.C. Molecular physics Flat surfaces Groove gratings Internal field Normal incidence Particular distribution Phase resonances Sensing devices Sub-wavelength Resonance It is well known that finite groove gratings with subwavelength features exhibit phase resonances, which are associated with a particular distribution of the magnetic field phase within the cavities and are characterized by a significant enhancement of the internal field. For a flat surface with identical grooves under symmetrical conditions of incidence, it was shown that a minimum of three cavities is required to excite a phase resonance. In this paper we show that by approaching a particle to the surface, this requirement is removed and the particle enables the excitation of phase resonances even in a system of two identical cavities under normal incidence. The influence of the position and the radius of the particle in the reflected far field response, as well as in the near and internal field, is analyzed. The possibility of exciting phase resonances in this system opens up new means for the design of sensing devices. © 2015 Optical Society of America. Fil:Valencia, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Skigin, D.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1559128X_v54_n25_p7679_Valencia
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Molecular physics
Flat surfaces
Groove gratings
Internal field
Normal incidence
Particular distribution
Phase resonances
Sensing devices
Sub-wavelength
Resonance
spellingShingle Molecular physics
Flat surfaces
Groove gratings
Internal field
Normal incidence
Particular distribution
Phase resonances
Sensing devices
Sub-wavelength
Resonance
Valencia, C.
Skigin, D.C.
Phase resonances induced by a subwavelength particle near a surface with two cavities
topic_facet Molecular physics
Flat surfaces
Groove gratings
Internal field
Normal incidence
Particular distribution
Phase resonances
Sensing devices
Sub-wavelength
Resonance
description It is well known that finite groove gratings with subwavelength features exhibit phase resonances, which are associated with a particular distribution of the magnetic field phase within the cavities and are characterized by a significant enhancement of the internal field. For a flat surface with identical grooves under symmetrical conditions of incidence, it was shown that a minimum of three cavities is required to excite a phase resonance. In this paper we show that by approaching a particle to the surface, this requirement is removed and the particle enables the excitation of phase resonances even in a system of two identical cavities under normal incidence. The influence of the position and the radius of the particle in the reflected far field response, as well as in the near and internal field, is analyzed. The possibility of exciting phase resonances in this system opens up new means for the design of sensing devices. © 2015 Optical Society of America.
format JOUR
author Valencia, C.
Skigin, D.C.
author_facet Valencia, C.
Skigin, D.C.
author_sort Valencia, C.
title Phase resonances induced by a subwavelength particle near a surface with two cavities
title_short Phase resonances induced by a subwavelength particle near a surface with two cavities
title_full Phase resonances induced by a subwavelength particle near a surface with two cavities
title_fullStr Phase resonances induced by a subwavelength particle near a surface with two cavities
title_full_unstemmed Phase resonances induced by a subwavelength particle near a surface with two cavities
title_sort phase resonances induced by a subwavelength particle near a surface with two cavities
url http://hdl.handle.net/20.500.12110/paper_1559128X_v54_n25_p7679_Valencia
work_keys_str_mv AT valenciac phaseresonancesinducedbyasubwavelengthparticlenearasurfacewithtwocavities
AT skigindc phaseresonancesinducedbyasubwavelengthparticlenearasurfacewithtwocavities
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