Fundamental Limits to Near-Field Optical Response over Any Bandwidth

@article{Shim2019FundamentalLT,
  title={Fundamental Limits to Near-Field Optical Response over Any Bandwidth},
  author={Hyungki Shim and Lingling Fan and Steven G. Johnson and Owen D. Miller},
  journal={Physical Review X},
  year={2019}
}
We develop an analytical framework to derive upper bounds to light--matter interactions in the optical near field, where applications ranging from spontaneous-emission amplification to greater-than-blackbody heat transfer show transformative potential. Our framework connects the classic complex-analytic properties of causal fields with newly developed energy-conservation principles, resulting in a new class of power--bandwidth limits. These limits demonstrate the possibility of orders-of… 

Figures from this paper

Maximal single-frequency electromagnetic response

Modern nanophotonic and meta-optical devices utilize a tremendous number of structural degrees of freedom to enhance light--matter interactions. A fundamental question is how large such enhancements

Fundamental Limits to Radiative Heat Transfer: The Limited Role of Nanostructuring in the Near-Field.

It is found that while near-field radiative heat transfer between dipolar particles can saturate purely geometric "Landauer" limits, bounds on extended structures cannot, instead growing very slowly with respect to a material response figure of merit (an "inverse resistivity" for metals) due to the deleterious effects of multiple scattering between bodies.

Maximum electromagnetic local density of states via material structuring

Abstract The electromagnetic local density of states (LDOS) is crucial to many aspects of photonics engineering, from enhancing emission of photon sources to radiative heat transfer and

Optimal Nanoparticle Forces, Torques, and Illumination Fields

A universal property of resonant subwavelength scatterers is that their optical cross-sections are proportional to a square wavelength, λ2, regardless of whether they are plasmonic nanoparticles,

GlobalToperator bounds on electromagnetic scattering: Upper bounds on far-field cross sections

We present a method based on the scattering $\mathbb{T}$ operator, and conservation of net real and reactive power, to provide physical bounds on any electromagnetic design objective that can be

Optimality of optical forces and torques on nanoparticles via illumination/scattering channels

A universal property of resonant subwavelength scatterers is that their optical cross-sections are proportional to a square wavelength, $\lambda^2$, regardless of whether they are plasmonic

Fundamental Limits to the Refractive Index of Transparent Optical Materials

If the "elusive lossless metal" can be synthesized, it is shown that it would enable arbitrarily high refractive index in the high-dispersion regime, nearly achieving the bounds even at refractive indices of 100 and beyond at optical frequencies.

Material-dictated fundamental limits to nanophotonic response

For what applications are plasmonic materials better than all-dielectric materials, and vice versa? Or 2D materials versus their bulk counterparts? How does the requisite bandwidth affect materials

Optical materials for maximal nanophotonic response [Invited]

This article reviews the material properties that enable maximum optical response. We highlight theoretical results that enable shape-independent quantification of material "figures of merit,"

Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers.

Fundamental upper bounds on the Raman enhancement for arbitrary-shaped scatterers are found, depending only on its material constants and the separation distance from the molecule.

References

SHOWING 1-10 OF 142 REFERENCES

Fundamental limits to optical response in absorptive systems.

Fundamental limits to the optical response of absorptive systems are derived, bounding the largest enhancements possible given intrinsic material losses, through basic conservation-of-energy principles.

Limits to the Optical Response of Graphene and Two-Dimensional Materials.

This work considers canonical geometrical structures and derives general upper bounds to the strength of light-matter interactions, given only the optical conductivity of the material, including spatial nonlocality, and otherwise independent of shape and configuration.

Analysis of the Limits of the Local Density of Photonic States near Nanostructures

Nanostructures with sizes smaller than or comparable to visible light strongly modify the decay rate of dipole emitters placed in their vicinity. Such modification is usually characterized using the

Shape-Independent Limits to Near-Field Radiative Heat Transfer.

It is found that particle arrays interacting in an idealized Born approximation exhibit both enhancement factors, suggesting the possibility of orders-of-magnitude improvement beyond previous designs and the potential for radiative heat transfer to be comparable to conductive heat transfer through air at room temperature, and significantly greater at higher temperatures.

Probing the Ultimate Limits of Plasmonic Enhancement

It is found that the dominant limiting factor is not the resistive loss of the metal, but rather the intrinsic nonlocality of its dielectric response, which has implications for the ultimate performance of nanophotonic systems.

Speed-of-light limitations in passive linear media

We prove that well-known speed of light restrictions on electromagnetic energy velocity can be extended to a new level of generality, encompassing even nonlocal chiral media in periodic geometries,

Near-field radiative heat transfer between parallel structures in the deep subwavelength regime.

This work achieves an enhancement of heat transfer of almost two orders of magnitude with respect to the far-field limit and shows that it can maintain a temperature gradient of 260 K between the cold and hot surfaces at ∼100 nm distance.

Spectral tuning of near-field radiative heat flux between two thin silicon carbide films

Spectral distributions of radiative heat flux between two thin silicon carbide films separated by sub-wavelength distances in vacuum are analysed. An analytical expression for the near-field flux

Ultimate Limit of Light Extinction by Nanophotonic Structures.

The f-sum rule applies to arbitrarily complex plasmonic metal structures that exhibit an extraordinary spectral sensitivity to size, shape, near-field coupling effects, and incident polarization, thus imposing fundamental limits on solar light harvesting, biomedical photonics, and optical communications.

Radiative heat transfer in the extreme near field

Radiative transfer of energy at the nanometre length scale is of great importance to a variety of technologies including heat-assisted magnetic recording, near-field thermophotovoltaics and
...