Abstract
Here we use multipole decomposition approach to study optical properties of a silicon nanocylinder in different lossless media. We show that resonant peaks of multipole moments experience red shift, smoothing and broadening. Worth noting that electric multipoles experience bigger red shift than their magnetic counterparts. Our results can be applied to design optical devices within a single framework.
Highlights
We show that resonant peaks of multipole moments experience red shift, smoothing and broadening
Mutual multipole interaction leads to a wide range of opportunities for engineering nanoantennas, [22, 23, 24, 25, 26] sensors, [27, 28] optical filters, [29] energy harvesting devices, [30, 31] and cloaking. [32, 33, 34] Destructive interference between electric and toroidal moment find its application in anapole physics. [35, 36, 37, 38] Multipole decomposition has been applied in terahertz frequency range [39] and even for studying macroscopic objects. [40]
Worth noting that electric multipole moments experience bigger red shift magnetic ones
Summary
Dielectric nanophotonics is the one of the most relevant areas in modern optics [1, 2, 3] Subwavelength structures attract special interest due to an opportunity to manipulate light at the sub-wavelength regime. [4, 5, 6, 7, 8, 9, 10, 11] Size, shape, aspect ration, material dispersion and surrounding medium properties can be tuned in order to achieve needed optical properties. [12, 13, 14, 15, 3, 16]Here we use multipole decomposition approach [17, 18, 19, 20, 21] to study optical properties of a silicon nanocylinder in different surrounding media. We use multipole decomposition approach to study optical properties of a silicon nanocylinder in different lossless media. We show that resonant peaks of multipole moments experience red shift, smoothing and broadening.
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