Two-Photon Spontaneous Emission in Atomically Thin Plasmonic Nanostructures

Muniz, Y.; Manjavacas, Alejandro; Farina, C.; Dalvit, Diego A. R.; Kort-Kamp, Wilton J. M.

doi:10.1103/physrevlett.125.033601

Cited by 29 publications

(21 citation statements)

References 39 publications

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“…Resonance peaks at wavelengths of 1.5~5 μm are shifted by hundreds of nanometres and amplitude-modulated by tens of percent through gating using relatively low voltages. Combined with a large-scale fabrication approach, the fabricated films can find applications in transparent conductors, plasmon-enhanced spectroscopy, optical biosensing and electrochromic devices.Beyond the new plasmonic effects and applications mentioned above, UTMFs imply broader future applications in the fields of optoelectronics, nonlinear optics, plasmon-enhanced detection and sensing, thermal manipulation, two photon emission and plasmonic color printing [79][80][81]. 5.…”

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confidence: 99%

Plasmonic metal nanostructures with extremely small features: new effects, fabrication and applications

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confidence: 99%

Plasmonic metal nanostructures with extremely small features: new effects, fabrication and applications

et al. 2021

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“…When the dominant transition wavelengths are much larger than the emitter's dimensions it is accurate to use the dipole approximation. Moreover, using the spectral representation of the Green's tensor G(r, r ; ω) of the Helmholtz's equation [40], we can express the TPSE rate Γ (2) (r e ) in the form [17,18,31]:…”

Section: Two-photon Spontaneous Emission Ratementioning

confidence: 99%

“…where ω if is the transition frequency between the initial and the final state, while the tensor quantity D is defined as [18,31]:…”

Section: Two-photon Spontaneous Emission Ratementioning

confidence: 99%

“…Recent breakthroughs in nano-optical materials and technologies have attracted renewed interest in the engineering of TPSE quantum phenomena at the nanoscale [17,18]. In particular, by tailoring the local density of photon states (LDOS) in nanostructured environments [19], dramatic enhancements in the TPSE emission rate have been demonstrated using photonic cavities [13,20], plasmonic and two-dimensional nanostructures [17,21,22], and phonon-polaritons dielectric structures [23].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, using multifractal detrended fluctuation analysis (MDFA) [30], we establish the multifractal nature of the LDOS spectra of the Eisenstein and Gaussian arrays. Finally, we compute the TPSE enhancement spectra within the Green's function spectral method [18,31] and show how the presence of broadband LDOS fluctuations with multifractal scaling significantly enhance the TPSE rates compared to traditional photonic crystals with smooth (non-fractal) mode density. The engineering of complex scattering media with multifractal LDOS spectra provides a new route to achieve broadly tunable sources of entangled photon pairs based on room-temperature TPSE for quantum information research.…”

Section: Introductionmentioning

confidence: 99%

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Aperiodic bandgap structures for enhanced quantum two-photon sources

Negro,

Chen,

Gorsky

et al. 2021

Preprint

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In this paper we propose a novel approach to enhance the efficiency of the two-photon spontaneous emission process that is driven by the multifractal optical mode density of photonic structures based on the aperiodic distributions of Eisenstein and Gaussian primes. In particular, using the accurate Mie-Lorenz multipolar theory in combination with multifractal detrended fluctuation analysis, we compute the local density of states of periodic and aperiodic systems and demonstrate the formation of complete bandgaps with distinctive fractal scaling behavior for scattering arrays of dielectric nanocylinders. Moreover, we systematically study the Purcell enhancement and the most localized optical mode resonances in these novel aperiodic photonic systems and compute their two-photon spontaneous emission rates based on the general Green's tensor approach. Our results demonstrate that the excitation of the highly-resonant critical states of Eisenstein and Gaussian photonic arrays across broadband multifractal spectra gives rise to significantly enhanced emission rates compared to what is possible at the band-edges of periodic structures with comparable size. Besides defining a novel approach for enhanced quantum two-photon sources on the chip, the engineering of aperiodic bandgap structures with multifractal mode density may provide access to novel electromagnetic resonant phenomena in a multiscale-invariant vacuum for quantum nanophotonics applications.

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Comparative Analysis of the Near‐ and Far‐Field Optical Response of Thin Plasmonic Nanostructures

Zundel

Gieri

Sanders

et al. 2022

Advanced Optical Materials

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Nanostructures made of metallic materials support collective oscillations of their conduction electrons, commonly known as surface plasmons. These modes, whose characteristics are determined by the material and morphology of the nanostructure, couple strongly to light and confine it into subwavelength volumes. Of particular interest are metallic nanostructures for which the size along one dimension approaches the nanometer or even the subnanometer scale, since such morphologies can lead to stronger light–matter interactions and higher degrees of confinement than regular three‐dimensional nanostructures. Here, the plasmonic response of metallic nanodisks of varying thicknesses and aspect ratios is investigated under far‐ and near‐field excitation conditions. It is found that, for far‐field excitation, the strength of the plasmonic response of the nanodisk increases with its thickness, as expected from the increase in the number of conduction electrons in the system. However, for near‐field excitation, the plasmonic response becomes stronger as the thickness of the nanodisk is reduced. This behavior is attributed to the higher efficiency with which a near‐field source couples to the plasmons supported by thinner nanodisks. The results of this work advance the understanding of the plasmonic response of thin metallic nanostructures, thus increasing their potential for the development of novel applications.

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Two-Photon Spontaneous Emission in Atomically Thin Plasmonic Nanostructures

Cited by 29 publications

References 39 publications

Plasmonic metal nanostructures with extremely small features: new effects, fabrication and applications

Plasmonic metal nanostructures with extremely small features: new effects, fabrication and applications

Aperiodic bandgap structures for enhanced quantum two-photon sources

Comparative Analysis of the Near‐ and Far‐Field Optical Response of Thin Plasmonic Nanostructures

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