Shaping the Radiation Pattern of Second-Harmonic Generation from AlGaAs Dielectric Nanoantennas

Carletti, Luca; Locatelli, Andrea; Neshev, Dragomir N.; Angelis, C. De

doi:10.1021/acsphotonics.6b00050

Cited by 102 publications

(112 citation statements)

References 45 publications

(130 reference statements)

Supporting

Mentioning

106

Contrasting

Order By: Relevance

“…We build back-focal plane is zero, as recently predicted theoretically. 34 Zero SH emission in normal direction here originates from the symmetry of the nonlinear bulk χ (2) tensor and, thus, is not sensitive to geometry. As a result, the zero SH emission is observed for all studied AlGaAs nanodisks.…”

Section: 24mentioning

confidence: 84%

Nonlinear Generation of Vector Beams From AlGaAs Nanoantennas

Camacho‐Morales¹,

Rahmani²,

Kruk³

et al. 2016

Nano Lett.

Self Cite

264

253

View full text Add to dashboard Cite

The quest for nanoscale light sources with designer radiation patterns and polarization has motivated the development of nanoantennas that interact strongly with the incoming light and are able to transform its frequency, radiation and polarization patterns. Here, we demonstrate dielectric AlGaAs nanoantennas for efficient second harmonic generation, enabling the control of both directionality and polarization of 1

show abstract

Section: 24mentioning

confidence: 84%

Nonlinear Generation of Vector Beams From AlGaAs Nanoantennas

Camacho‐Morales¹,

Rahmani²,

Kruk³

et al. 2016

Nano Lett.

Self Cite

264

253

View full text Add to dashboard Cite

show abstract

“…This is due to the symmetry of the nonlinear tensor, as previously reported for SHG in Refs. (28,34). Detection of coincidences between photons generated through SPDC in the nanocylinder is illustrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

Spontaneous photon-pair generation from a dielectric nanoantenna

Marino

Solntsev

et al. 2019

Optica

Self Cite

121

125

View full text Add to dashboard Cite

Optical nanoantennas have shown a great capacity for efficient extraction of photons from the near to the far-field, enabling directional emission from nanoscale single-photon sources. However, their potential for the generation and extraction of multi-photon quantum states remains unexplored. Here we demonstrate experimentally the nanoscale generation of two-photon quantum states at telecommunication wavelengths based on spontaneous parametric down-conversion in an optical nanoantenna. The antenna is a crystalline Al-GaAs nanocylinder, possessing Mie-type resonances at both the pump and the bi-photon wavelengths and when excited by a pump beam generates photonpairs with a rate of 35 Hz. Normalized to the pump energy stored by the nanoantenna, this rate corresponds to 1.4 GHz/Wm, being one order of magnitude higher than conventional on-chip or bulk photon-pair sources. Our experiments open the way for multiplexing several antennas for coherent generation of multi-photon quantum states with complex spatial-mode entanglement and applications in free-space quantum communications and sensing.

show abstract

“…On the other hand, this supposed drawback can be actually an advantage and might be used in far-field measurements to gain information about the emitter location on a subwavelength scale. Using Kerker-type scattering effects, the emission from a nanostructure itself, such as photoluminescence [101][102][103] or nonlinear effects like second harmonic generation [104,105], can be focused into a preferred direction, which is useful in the detection of weak signals from individual nanostructures.…”

Section: Applications Of Nanoscale Directional Scatteringmentioning

confidence: 99%

Fano-resonances in High Index Dielectric Nanowires for Directional Scattering

Wiecha

Cuche

Kallel

et al. 2018

Springer Series in Optical Sciences

View full text Add to dashboard Cite

High refractive index dielectric nanostructures provide original optical properties thanks to the occurrence of size-and shape-dependent optical resonance modes. These modes commonly present a spectral overlap of broad, low-order modes (e.g. dipolar modes) and much narrower, higher-order modes. The latter are usually characterized by a rapidly varying frequency-dependent phase, which -in superposition with the lower order mode of approximately constant phase -leads to typical spectral features known as Fano resonances. Interestingly, such Fano resonances occur in dielectric nanostructures of the simplest shapes. In spheroidal nanoparticles, interference between broad magnetic dipole and narrower electric dipole modes can be observed. In high aspect-ratio structures like nanowires, either the electric or the magnetic dipolar mode (depending on the illumination conditions) interferes with higher order multipole contributions of the same nature (electric or magnetic). Using the analytical Mie theory, we analyze the occurrence of Fano resonances in high-index dielectric nanowires and discuss their consequences like unidirectional scattering. By means of numerical simulations, we furthermore study the impact on those Fano resonances of the shape of the nanowire cross-sections as well as the coupling of two parallel nanowires. The presented results show that all-dielectric nanostructures, even of simple shapes, provide a reliable low-loss alternative to plasmonic nanoantennas. arXiv:1801.05601v1 [physics.app-ph]

show abstract

Shaping the Radiation Pattern of Second-Harmonic Generation from AlGaAs Dielectric Nanoantennas

Cited by 102 publications

References 45 publications

Nonlinear Generation of Vector Beams From AlGaAs Nanoantennas

Nonlinear Generation of Vector Beams From AlGaAs Nanoantennas

Spontaneous photon-pair generation from a dielectric nanoantenna

Fano-resonances in High Index Dielectric Nanowires for Directional Scattering

Contact Info

Product

Resources

About