dorsal/arxiv
View SchemaBound whispering gallery modes in circular arrays of dielectric spherical particles
| Authors | Alexander L. Burin |
|---|---|
| Categories | |
| ArXiv ID | physics/0510253 |
| URL | https://arxiv.org/abs/physics/0510253 |
| DOI | 10.1103/PhysRevE.73.066614 |
Abstract
Low-dimensional ordered arrays of optical elements can possess bound modes having an extremely high quality factor. Typically, these arrays consist of metal elements which have significantly high light absorption thus restricting performance. In this paper we address the following question: can bound modes be formed in dielectric systems where the absorption of light is negligible? Our investigation of circular arrays of spherical particles shows that (1) high quality modes in an array of 10 or more particles can be attained at least for a refractive index $n_{r}>2$, so optical materials like TiO$_{2}$ or GaAs can be used; (2) the most bound modes have nearly transverse polarization perpendicular to the circular plane; (3) in a particularly interesting case of TiO$_{2}$ particles (rutile phase, $n_{r}=2.7$), the quality factor of the most bound mode increases almost by an order of magnitude with the addition of 10 extra particles, while for particles made of GaAs the quality factor increases by almost two orders of magnitude with the addition of ten extra particles. We hope that this preliminary study will stimulate experimental investigations of bound modes in low-dimensional arrays of dielectric particles.
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"abstract": "Low-dimensional ordered arrays of optical elements can possess bound modes\nhaving an extremely high quality factor. Typically, these arrays consist of\nmetal elements which have significantly high light absorption thus restricting\nperformance. In this paper we address the following question: can bound modes\nbe formed in dielectric systems where the absorption of light is negligible?\nOur investigation of circular arrays of spherical particles shows that (1) high\nquality modes in an array of 10 or more particles can be attained at least for\na refractive index $n_{r}\u003e2$, so optical materials like TiO$_{2}$ or GaAs can\nbe used; (2) the most bound modes have nearly transverse polarization\nperpendicular to the circular plane; (3) in a particularly interesting case of\nTiO$_{2}$ particles (rutile phase, $n_{r}=2.7$), the quality factor of the most\nbound mode increases almost by an order of magnitude with the addition of 10\nextra particles, while for particles made of GaAs the quality factor increases\nby almost two orders of magnitude with the addition of ten extra particles. We\nhope that this preliminary study will stimulate experimental investigations of\nbound modes in low-dimensional arrays of dielectric particles.",
"arxiv_id": "physics/0510253",
"authors": [
"Alexander L. Burin"
],
"categories": [
"physics.optics"
],
"doi": "10.1103/PhysRevE.73.066614",
"title": "Bound whispering gallery modes in circular arrays of dielectric spherical particles",
"url": "https://arxiv.org/abs/physics/0510253"
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