Harvesting light at the nanoscale by GaAs-gold nanowire arrays

Collin, Stéphane; Pardo, Fabrice; Bardou, Nathalie; Lemaı̂tre, A.; Аверин, С. В.; Pélouard, Jean-Luc

doi:10.1364/oe.19.017293

Cited by 15 publications

(11 citation statements)

References 17 publications

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“…Optical antennas exploit the resonant behavior and large scattering cross section of plasmons in nanostructured metals for use in a wide variety of applications including surface-enhanced Raman spectroscopy (SERS) 1,2 , subwavelength optics 3,4 , plasmonic optical trapping [5][6][7][8] , and plasmon-assisted light harvesting [9][10][11][12][13][14][15][16][17] . Photosensitive devices utilizing plasmonic nanoantennas generate photocurrent through two dominant mechanisms:…”

Section: Introductionmentioning

confidence: 99%

Plasmon-Assisted Photoresponse in Ge-Coated Bowtie Nanojunctions

2015

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We demonstrate plasmon-enhanced photoconduction in Au bowtie nanojunctions containing nanogaps overlaid with an amorphous Ge film. The role of plasmons in the production of nanogap photocurrent is verified by studying the unusual polarization dependence of the photoresponse. With increasing Ge thickness, the nanogap polarization of the photoresponse rotates 90 degrees, indicating a change in the dominant relevant plasmon mode, from the resonant transverse plasmon at low thicknesses to the nonresonant "lightning rod"mode at higher thicknesses. To understand the plasmon response in the presence of the Ge overlayer and whether the Ge degrades the Au plasmonic properties, we investigate the photothermal response (from the temperature-dependent Au resistivity) in no-gap nanowire structures, as a function of Ge film thickness and nanowire geometry. The film thickness and geometry dependence are modeled using a cross-sectional, finite element simulation. The no-gap structures and the modeling confirm that the striking change in nanogap polarization response results from redshifting of

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Section: Introductionmentioning

confidence: 99%

Plasmon-Assisted Photoresponse in Ge-Coated Bowtie Nanojunctions

2015

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“…Also, integration with photonic structures is expected to result in spectral selectivity at desired wavelengths for potential applications such as nondispersive infrared spectroscopy (NDIR), infrared chemical imaging, and multicolor IR imaging. In this context, a number of dispersive photonic structures have been proposed such as micromachined Fabry–Perot interferometers, , photonic crystals, , or plasmonic structures. − …”

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confidence: 99%

Hole Array Perfect Absorbers for Spectrally Selective Midwavelength Infrared Pyroelectric Detectors

et al. 2016

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We demonstrate a hybrid plasmonic−pyroelectric device operating as an uncooled midwavelength infrared detector with narrowband spectral selectivity. The device consists of a plasmonic perfect absorber with a built-in pyroelectric ZnO layer: It consists of a ZnO layer sandwiched by a Au microhole array as a top electrode and a Pt bottom electrode as a template for the uniaxially grown ZnO film. The geometrical design of the plasmonic Au (hole array)/ZnO/Pt system is determined by the numerical electromagnetic simulation and then fabricated by colloidal-mask lithography combined with reactive-ion etching. The fabricated detectors exhibit excellent spectral selectivity at the predesigned plasmonic resonances, which are tunable by changing the Au hole diameters. The results obtained here open up a route for realizing a new type of uncooled spectroscopic infrared detectors with a compact design and simple fabrication process.

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“…[ 14–17 ] By properly integrating an asymmetric metamaterial into an optoelectronic device, CPL with the selected handedness could efficiently interact with the optoelectronic material in the excited mode, while CPL with the opposite handedness would mostly be excluded from the system, leading to a strong circular dichroism far beyond the reach of natural media. For asymmetric plasmonic metamaterials, the selectively excited optical mode could be squeezed into a deep subwavelength scale so that the efficient light–matter interaction could be contained in a small volume, leading to low‐noise, high‐speed, [ 18,19 ] and efficient charge collection, [ 20 ] as favored by most optoelectronic devices. In view of the advantages of this approach, several studies have been conducted on asymmetric plasmonic metamaterial‐integrated optoelectronic devices.…”

Section: Figurementioning

confidence: 99%

Circular Polarization Discrimination Enhanced by Anisotropic Media

Chu

Zhou

Dai

et al. 2020

Advanced Optical Materials

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adom.201901800.Circularly polarized light (CPL) has its electric field rotating with a constant magnitude in a plane perpendicular to the direction of the wave. Based on the direction of rotation, a circularly polarized wave is either left-circularly polarized (LCP) or right-circularly polarized (RCP), corresponding to the two spin states of photons. Owing to the superior robustness of circular polarization states during transmission, [1] during asymmetrical interaction with chiral matters, [2] and in the quantum information carried by its photon spin states, [3] circularly polarized light has promising applications in optical communication, [4] imaging, [5] sensing, [6] and quantum information processing. [7][8][9] Adv. Optical

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Harvesting light at the nanoscale by GaAs-gold nanowire arrays

Cited by 15 publications

References 17 publications

Plasmon-Assisted Photoresponse in Ge-Coated Bowtie Nanojunctions

Plasmon-Assisted Photoresponse in Ge-Coated Bowtie Nanojunctions

Hole Array Perfect Absorbers for Spectrally Selective Midwavelength Infrared Pyroelectric Detectors

Circular Polarization Discrimination Enhanced by Anisotropic Media

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