All-dielectric optical nanoantennas (Review)

Krasnok, Alexandr E.; Belov, Pavel A.; Miroshnichenko, Andrey E.; Kuznetsov, Arseniy I.; Luk’yanchuk, Boris; Kivshar, Yuri S.

doi:10.48550/arxiv.1411.2768

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An alternative strategy in nanophotonics is to use high-index dielectric materials for building blocks that control lightmater interaction [13][14][15] . Dielectric nanoparticles have attracted a considerable attention due to their appealing applications [16][17][18][19][20][21][22] .…”

mentioning

confidence: 99%

All-dielectric reciprocal bianisotropic nanoparticles

et al. 2015

Self Cite

View full text Add to dashboard Cite

The study of high-index dielectric nanoparticles currently attracts a lot of attention. They do not suffer from absorption but promise to provide control on the properties of light comparable to plasmonic nanoparticles. To further advance the field, it is important to identify versatile dielectric nanoparticles with unconventional properties. Here, we show that breaking the symmetry of an alldielectric nanoparticle leads to a geometrically tunable magneto-electric coupling, i.e. an omega-type bianisotropy. The suggested nanoparticle exhibits different backscatterings and, as an interesting consequence, different optical scattering forces for opposite illumination directions. An array of such nanoparticles provides different reflection phases when illuminated from opposite directions. With a proper geometrical tuning, this bianisotropic nanoparticle is capable of providing a 2π phase change in the reflection spectrum while possessing a rather large and constant amplitude. This allows creating reflectarrays with near-perfect transmission out of the resonance band due to the absence of an usually employed metallic screen.

show abstract

mentioning

confidence: 99%

All-dielectric reciprocal bianisotropic nanoparticles

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…5 Prominent MDRs and EDRs in high-n dielectric particles have been recently demonstrated for SiC, 15 barium strontium titanate, 16 Te, 17 and Si, 14,18 among others, in a wide electromagnetic spectral range, from the microwave to the visible. Due to its very high refractive index (n ≈ 3.8 at 633 nm), 1 Si shows very strong resonances in the vis-NIR, measured on the single particle level using dark-field microscopy 8 and in highly monodisperse colloidal Si dispersions by transmission measurements. 19 The energy band gap and the n value of semiconducting/ insulating materials are inversely correlated, 20 while many semiconducting materials commonly show a relatively high n. 20,21 Copper(I) chalcogenides, which are typically p-type semiconductors, exhibit moderately high refractive indices, ∼2.5 at 500 nm.…”

Section: ■ Introductionmentioning

confidence: 99%

Refractive Index Sensing Using Visible Electromagnetic Resonances of Supported Cu₂O Particles

Susman

Vaskevich

Rubinstein

2017

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Plasmonic metal nanostructures, in colloidal or surface-supported forms, have been extensively studied in the context of metamaterials design and applications, in particular as refractometric sensing platforms. Recently, high refractive index (high-n) dielectric subwavelength structures have been experimentally shown to support strong Mie scattering resonances, predicted to exhibit analogous refractive index sensing capabilities. Here we present the first experimental demonstration of the use of supported high-n dielectric nano/microparticle ensembles as refractive index sensing platforms, using cuprous oxide as a model high-n material. Single-crystalline CuO particles were deposited on transparent substrates using a chemical deposition scheme, showing well-defined electric and magnetic dipolar resonances (EDR and MDR, respectively) in the visible range, which change in intensity and wavelength upon changing the medium refractive index (n). The significant modulation of the MDR intensity when n is modified appears to be the most valuable empirical sensing parameter. The Mie scattering properties of CuO particles, particularly the spectral dependence of the MDR on n, are theoretically modeled to support the experimental observations. MDR extinction changes (i.e., refractive index sensitivity) per particle are >100 times higher compared to localized surface plasmon resonance (LSPR) changes in supported Au nanoislands, encouraging the evaluation of CuO and other high-n dielectric particles and sensing modes in order to improve the sensitivity in optical (bio)sensing applications.

show abstract

All-dielectric optical nanoantennas (Review)

Cited by 2 publications

References 0 publications

All-dielectric reciprocal bianisotropic nanoparticles

All-dielectric reciprocal bianisotropic nanoparticles

Refractive Index Sensing Using Visible Electromagnetic Resonances of Supported Cu₂O Particles

Contact Info

Product

Resources

About

All-dielectric optical nanoantennas (Review)

Cited by 2 publications

References 0 publications

All-dielectric reciprocal bianisotropic nanoparticles

All-dielectric reciprocal bianisotropic nanoparticles

Refractive Index Sensing Using Visible Electromagnetic Resonances of Supported Cu2O Particles

Contact Info

Product

Resources

About

Refractive Index Sensing Using Visible Electromagnetic Resonances of Supported Cu₂O Particles