Transmitting Hertzian Optical Nanoantenna with Free-Electron Feed

Denisyuk, A.I.; Adamo, Giorgio; MacDonald, Kevin F.; Edgar, J.A.; Arnold, Matthew D.; Myroshnychenko, Viktor; Ford, Michael J.; Abajo, F. Javier García de; Zheludev, Nikolay I.

doi:10.1021/nl1002813

Cited by 38 publications

(37 citation statements)

References 24 publications

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“…In terms of interfacing electronics and plasmonics, it is of course mandatory to efficiently convert electrical signals into plasmon waves and vice-versa. Recently, electrical sources [297][298][299] and electrical detection [300,301] of plasmons have been realized. Also, electrical, mechanical, or optical tuning of nanoantennas by means of anisotropic load materials [302,303], stretchable elastomeric films [304], or photoconductive gap loads [305,306] has been proposed and demonstrated.…”

Section: Nanoantennas and Plasmonic Circuitsmentioning

confidence: 99%

Nanoantennas for visible and infrared radiation

Biagioni¹,

Huang²,

Hecht³

2012

Rep. Prog. Phys.

832

775

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Abstract. Nanoantennas for visible and infrared radiation can strongly enhance the interaction of light with nanoscale matter by their ability to efficiently link propagating and spatially localized optical fields. This ability unlocks an enormous potential for applications ranging from nanoscale optical microscopy and spectroscopy over solar energy conversion, integrated optical nanocircuitry, opto-electronics and density-ofstates engineering to ultra-sensing as well as enhancement of optical nonlinearities. Here we review the current understanding of metallic optical antennas based on the background of both well-developed radiowave antenna engineering and plasmonics. In particular, we discuss the role of plasmonic resonances on the performance of nanoantennas and address the influence of geometrical parameters imposed by nanofabrication. Finally, we give a brief account of the current status of the field and the major established and emerging lines of investigation in this vivid area of research.

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Section: Nanoantennas and Plasmonic Circuitsmentioning

confidence: 99%

Nanoantennas for visible and infrared radiation

Biagioni¹,

Huang²,

Hecht³

2012

Rep. Prog. Phys.

832

775

View full text Add to dashboard Cite

show abstract

“…Plasmonic resonances strongly concentrate electromagnetic fields, which can be exploited in a range of applications including those involving energy transport 1,2 , imaging 3,4 , and sensing 5,6 . The damping of plasmonic resonances usually reduces their performance in applications and understanding this problem is of considerable practical importance.…”

Section: Introductionmentioning

confidence: 99%

Damping of Plasmons of Closely Coupled Sphere Chains Due to Disordered Gaps

et al. 2011

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The damping of plasmons due to structural disorder may have important practical consequences. Here we use spherical harmonic expansions to quantify the damping of plasmons of ensembles of closely coupled sphere chains with moderately disordered gaps.We show that the quadratic shift of average resonance position due to disorder is maintained in the transition from weak to close coupling, but the sensitivity to disorder increases.Further we find that although the main peak is most often damped and broadened by disorder, it is possible for the optical extinction of disordered gold chains to increase slightly due to red-skew into a region with more favorable metal properties.

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“…The evanescent electromagnetic field about the electron trajectory provides a stable and highly localized (B10 nm) broadband source of surface plasmons that does not perturb the dielectric environment enabling spatially resolved studies of plasmonic modes over a broad spectral range in a single experiment 17,[29][30][31][32][33][34][35][36][37] . Using angle-resolved cathodoluminescence (CL) imaging spectroscopy (ARCIS) 17,38 , we show that the interference between locally excited multipole components in the Au particles can give rise to strongly directional emission in a single element nanoantenna.…”

mentioning

confidence: 99%

Directional emission from a single plasmonic scatterer

et al. 2014

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Directing light emission is key for many applications in photonics and biology. Optical antennas made from nanostructured plasmonic metals are suitable candidates for this purpose but designing antennas with good directional characteristics can be challenging, especially when they consist of multiple elements. Here we show that strongly directional emission can also be obtained from a simple individual gold nanodisk, utilizing the far-field interference of resonant electric and magnetic modes. Using angle-resolved cathodoluminescence spectroscopy, we find that the spectral and angular response strongly depends on excitation position. For excitation at the nanodisk edge, interference between in-plane and out-of-plane dipole components leads to strong beaming of light. For large nanodisks, higher-order multipole components contribute significantly to the scattered field, leading to enhanced directionality. Using a combination of full-wave simulations and analytical point scattering theory we are able to decompose the calculated and measured scattered fields into dipolar and quadrupolar contributions.

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Transmitting Hertzian Optical Nanoantenna with Free-Electron Feed

Cited by 38 publications

References 24 publications

Nanoantennas for visible and infrared radiation

Nanoantennas for visible and infrared radiation

Damping of Plasmons of Closely Coupled Sphere Chains Due to Disordered Gaps

Directional emission from a single plasmonic scatterer

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