Directed emission by electrically-driven optical antennas

Kullock, René; Grimm, Philipp; Ochs, Maximilian; Hecht, Bert

doi:10.1117/12.2289647

Cited by 5 publications

(6 citation statements)

References 12 publications

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“…Another optical functionality that is in the focus of the plasmonics community is the directional routing of light. Not only individual nanostructures were demonstrated for directional scattering of far-field light [11][12][13], color-routing [14], quantum emitter radiation steering [9,[15][16][17][18][19], electro-luminescence [20,21] or directional non-linear emission [22]. Also metasurfaces for directional scattering and color-routing have been proposed [23,24].…”

mentioning

confidence: 99%

Design of plasmonic directional antennas via evolutionary optimization

Wiecha¹,

Majorel²,

Girard³

et al. 2019

Opt. Express

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We demonstrate inverse design of plasmonic nanoantennas for directional light scattering. Our method is based on a combination of full-field electrodynamical simulations via the Green dyadic method and evolutionary optimization (EO). Without any initial bias, we find that the geometries reproducibly found by EO, work on the same principles as radio-frequency antennas. We demonstrate the versatility of our approach by designing various directional optical antennas for different scattering problems. EO based nanoantenna design has tremendous potential for a multitude of applications like nano-scale information routing and processing or single-molecule spectroscopy. Furthermore, EO can help to derive general design rules and to identify inherent physical limitations for photonic nanoparticles and metasurfaces.

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mentioning

confidence: 99%

Design of plasmonic directional antennas via evolutionary optimization

Wiecha¹,

Majorel²,

Girard³

et al. 2019

Opt. Express

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“…In this study, semiconductor nano-antennas are proposed as energy-storing nanostructures that can generate an ultra-wideband supercontinuum ranging from the far-infrared range to the ultraviolet range of the spectrum and attain a supercontinuum-bandwidth that even surpasses the supercontinuum-bandwidth that is attained via optical fibers. Such a structure is simpler than the previously proposed micro-and nanoscale structures (Chen et al 2018;Monticone et al 2017;Hanke et al 2009;Ünlü et al 2011;Montesinos-Ballester et al 2020;Sain et al 2019), easier to fabricate (Sain et al 2019), and achieves a wider bandwidth than the previously reported bandwidths (Chen et al 2018;Husakou and Herrmann 2002;Mühlschlegel et al 2005;Liu et al 2015;Krasavin et al 2016;Gorbach 2015;Wu et al 2013;Dasgupta et al 2018;Park et al 2018;Horiuchi 2020;Bharadwaj et al 2011;Park 2009;Kullock et al 2018;Monticone et al 2017;Hanke et al 2009;Ünlü et al 2011;Montesinos-Ballester et al 2020), paving the way for on-chip spectroscopy, ultrashort pulse generation, and on-chip highenergy density storage. The paper also discusses the potential replacement of photonic crystal fibers with semiconductor nano-antennas for supercontinuum generation, provided that a certain pattern of optical excitation is followed.…”

Section: Introductionmentioning

confidence: 84%

“…However, as miniaturization of optical devices is under continuous progress to accomplish more complicated and numerous on-chip tasks, supercontinuum generation using micro/nanoscale devices is of significant interest. Miniaturizing optical devices is of critical importance for future applications such as quantum computing and novel metamaterial design, but replacing the existing macroscale optical devices with their nanophotonic versions while maintaining the same performance and functionality is a big challenge (Park et al 2018;Horiuchi 2020;Bharadwaj et al 2011;Park 2009;Kullock et al 2018). Recently, micro-and nanoscale structures that can generate a supercontinuum have been reported or proposed (Chen et al 2018;Krasavin et al 2016;Gorbach 2015;Dasgupta et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Far-IR to deep-UV adaptive supercontinuum generation using semiconductor nano-antennas via carrier injection rate modulation

Aşırım

2021

Appl Nanosci

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Supercontinuum generating sources, which incorporate a non-linear medium that can generate a wideband intensity spectrum under high-power excitation, are ideal for many applications of photonics such as spectroscopy and imaging. Supercontinuum generation using ultra-miniaturized devices is of great interest for on-chip imaging, on-chip measurement, and for future integrated photonic devices. In this study, semiconductor nano-antennas are proposed for ultra-broadband supercontinuum generation via analytical and numerical investigation of the electric field wave equation and the Lorentz dispersion model, incorporating semiconductor electron dynamics under optical excitation. It is shown that by a rapid modulation of the carrier injection rate for a semiconductor nano-antenna, one can generate an ultra-wideband supercontinuum that extends from the far-infrared (Far-IR) range to the deep-ultraviolet (Deep-UV) range for an infrared excitation of arbitrary intensity level. The modulation of the injection rate is achieved by high-intensity pulsed-pump irradiation of the nano-antenna, which has a fast nonradiative electron recombination mechanism that is on the order of sub-picoseconds. It is shown that when the pulse period of the pump irradiation is of the same order with the electron recombination time, rapid modulation of the free electron density occurs and electric energy accumulates in the nano-antenna, allowing for the generation of a broad supercontinuum. The numerical results are compared with the semiempirical second harmonic generation efficiency results for validation and a mean accuracy of 99.7% is observed. The aim of the study is to demonstrate that semiconductor nano-antennas can be employed to achieve superior supercontinuum generation performance at the nanoscale and the process can be programmed in an adaptive manner for continuous spectral shaping via tuning the pulse period of the pump irradiation.

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“…An alternative directional IET-driven antenna design, based on the well-known Yagi-Uda antenna concept [23,24,136,139], was proposed by Kullock et al [135], cf. Fig.…”

Section: Emission Control Via Antenna Designmentioning

confidence: 99%

Optical antennas driven by quantum tunneling: a key issues review

Parzefall

Novotny

2019

Rep. Prog. Phys.

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Analogous to radio-and microwave antennas, optical nanoantennas are devices that receive and emit radiation at optical frequencies. Until recently, the realization of electrically driven optical antennas was an outstanding challenge in nanophotonics. In this review we discuss and analyze recent reports in which quantum tunneling-specifically inelastic electron tunneling-is harnessed as a means to convert electrical energy into photons, mediated by optical antennas. To aid this analysis we introduce the fundamentals of optical antennas and inelastic electron tunneling. Our discussion is focused on recent progress in the field and on future directions and opportunities. :1910.01224v1 [cond-mat.mes-hall] CONTENTS arXiv

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Directed emission by electrically-driven optical antennas

Cited by 5 publications

References 12 publications

Design of plasmonic directional antennas via evolutionary optimization

Design of plasmonic directional antennas via evolutionary optimization

Far-IR to deep-UV adaptive supercontinuum generation using semiconductor nano-antennas via carrier injection rate modulation

Optical antennas driven by quantum tunneling: a key issues review

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