Physics and optical applications of all-dieletric nanostructures
All-dielectric nanostructures have thrived in recent years as a promising and effective alternative to plasmonic nanoantennas to manipulate light–matter interactions at the nanoscale. With no material dissipation, in principle, and controlled radiation losses, all-dielectric nanostructures support a range of novel resonating phenomena including Mie resonances, bound states in the continuum, and anapole modes. Their advantages have been demonstrated in a range of novel applications (e.g. fluorescence enhancement, nonlinear optics, sensing).
In this thematic issue, we invite contributions on theoretical, numerical, and experimental investigations of various optical phenomena based on all-dielectric nanostructures, with an emphasis on the exploration of new resonating behaviors and novel applications of all-dielectric nanostructures to manipulate optical processes across the whole electromagnetic spectrum.
The submitted manuscripts are expected to contain, but are not limited to, the following topics:
- Reviews on general nano-optics based on all-dielectric nanostructures.
- Theoretical and numerical investigations of novel optical resonances.
- Novel structure design to support controlled resonances.
- Strong coupling of matter excitations and optical resonances.
- Hybrid nanostructures involving both plasmonic and dielectric components.
- All-dielectric nanoscale optoelectronic devices.
- Applications of various resonances supported by all-dielectric nanostructures.
Submission deadline: December 31, 2022
(please contact the guest editors directly if you cannot meet this deadline)
- Full Research Paper
- Published 19 Jul 2022
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Figure 1: Schematic of the graphene absorber consisting of a graphene monolayer and a substrate separated by ...
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Figure 2: Simulated absorption spectrum for the graphene absorber with operating wavelength at about 7908.03 ...
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Figure 3: Electromagnetic field distributions: (a) real(Hy), (b) real(Ex), (c) real(Ez), and (d) |E|2 = |Ex|2...
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Figure 4: (a) Simulated zero-order transmission spectra of the structures without graphene monolayer for angl...
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Figure 5: Polar plot of the absorption at wavelengths of λ1 = 7908.03 nm and λ2 = 7444.8 nm.
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Figure 6: Absorption spectra of the graphene absorbers for different values of (a) d, (b) h and (c) w.
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Figure 7: Absorption spectra with different Fermi levels. The geometric parameters of the absorber are the sa...
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- Full Research Paper
- Published 24 Aug 2022
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Figure 1: Scattering spectra (both total scattering and the contributions from different multipoles are inclu...
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Figure 2: Scattering spectra are shown in (a) for m = 5.14 and in (d) for m = 2.83. For each scenario, there ...
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Figure 3: Scattering spectra are shown in (a) for m = 1.1875 + 0.1i (with loss) and in (d) for m = 1.275 − 4....
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- Full Research Paper
- Published 23 Sep 2022
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Figure 1: An algorithm for solving the scattering rate and electron distribution for each subband using all-o...
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Figure 2: Calculated conduction subbands and moduli squared of relevant wave functions with a 53 kV/cm DC bia...
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Figure 3: Numbers of electrons in each subband using optical injection at wavelengths of 1550 nm (a) and 820 ...
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Figure 4: Electron lifetime of each subband using optical injection at wavelengths of 1550 nm (a) and 820 nm ...
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Figure 5: Optical gain as a function of optical injection power.
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Figure 6: Current vs optical injection power at wavelengths of 1550 nm (black circles) and 820 nm (red square...
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Figure 7: Modulation depth and photon number vs optical injection power at two wavelengths.
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- Full Research Paper
- Published 27 Sep 2022
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Figure 1: Conceptual design shows cross-section of hybrid plano-concave microcavity with a 2D hBN layer insid...
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Figure 2: Fabrication steps of hybrid microcavity. (a) hBN layer positioned on top of DBR. (b) Concave polyme...
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Figure 3: Cross-section of hybrid plano-concave microcavity shows the geometrical parameters and the two Gaus...
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Figure 4: Spotsizes W02 and W2 for different values of R2 and L2.
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Figure 5: Transverse cut of Figure 4 through length L2 = 5.03 μm to show dependence of R2 with spotsizes. As the valu...
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Figure 6: Electric field distribution of a hBN + DBR system on a L(HL)15 configuration. Maximum electric fiel...
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Figure 7: Transmittance of plano-concave cavity shows the fundamental TEM modes at 595 nm, 636 nm and 684 nm.
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Figure 8: Purcell factor of plano-concave microcavity. Fundamental TEM Gaussian modes are found at 595 nm, 63...
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- Full Research Paper
- Published 28 Oct 2022
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Figure 1: The layout of the double-layer step-zoom metalens.
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Figure 2: Phase profiles of the front and rear metasurfaces for (a) short and (b) long focal lengths.
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Figure 3: (a) Schematic of a TiO2 rectangular nanopillar. (b) Simulated transmittance and phase modulations o...
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Figure 4: Simulated intensity distributions for different incident angles with RCP incidence corresponding to...
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Figure 5: Simulated intensity distributions for different incident angles with LCP incidence corresponding to...
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- Full Research Paper
- Published 25 Nov 2022
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Figure 1: Schematic of the double-layer symmetric gratings structure.
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Figure 2: Reflection spectra mapping of the DLSG-based structure with respect to wavelength and α.
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Figure 3: a) Reflection spectra of the structure with different α values. The magnetic field contours |Hy| fo...
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Figure 4: The complex eigenfrequencies of the two modes with respect to α.
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Figure 5: The Q-factor as a function of α of a) mode 1 and b) mode 2. The insets show the field distributions...
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Figure 6: Reflection spectra mapping of the sensor with respect to wavelength and different h values at α = 0...
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Figure 7: The Q-factor as a function of cavity length h of a) mode 1 and b) mode 2. The insets show the field...
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Figure 8: The S and FOM of a) mode 1 and b) mode 2 at different α values and h = 1000 nm. The S and FOM of c)...
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Figure 9: a) Reflection spectra of the sensor at different refractive indices of the gas medium. b) Positions...
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