Photoacoustic observation of nonradiative decay of surface plasmons in silver

Inagaki, Takashi; Kagami, Kei; Arakawa, E. T.

doi:10.1103/physrevb.24.3644

Cited by 85 publications

(40 citation statements)

References 10 publications

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“…It has been widely applied to characterize plasmonic nanoparticles and metasurfaces. [35][36][37][38][39] We recently applied this technique to measure the resonant absorption in the NW samples of same geometric parameters before they had been exposed to Au flux. [33] Similar PA setup is shown in Figure 2a: the samples are shined from the air side by a Xenon arc lamp source followed by a monochromator, which provides the spectral range from 300 to 1100 nm.…”

Section: Photoacoustic Technique and Linear Characterizationmentioning

confidence: 99%

Evidence of Optical Circular Dichroism in GaAs‐Based Nanowires Partially Covered with Gold

Leahu

Petronijevic

Belardini

et al. 2017

Advanced Optical Materials

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thus paves the way for the important applications spreading from negative refraction, [1][2][3] chiral sensing [4,5] to production of optical field carrying out optical angular momentum for quantum information applications. [6] It has been shown that plasmonic nanostructures forming 1D [7] elements, 2D metasurfaces, [8][9][10] and 3D metamaterials [11] can exhibit linear chiral response due to their own, intrinsic chirality. Also semiconductor nanostructures can exhibit chiral features. [12][13][14][15][16] From the optical point of view, chiral structures possess the ability to rotate the plane of the polarization of electromagnetic waves (optical activity), and give rise to circular dichroism-i.e., the difference in the absorption of right-and lefthanded circular polarized light.Apart from 3D chiral objects, the possibility to obtain optical chirality, i.e., optical activity, with nonchiral elements was studied in the past, [17] but only recently reconsidered. [18,19] This phenomenon is obtained when the experimental configuration composed by both the nonchiral object and the optical incident field is nonsuperimposable on its mirror image. [20] This is called "extrinsic" chirality; in our previous works we have investigated this type of chirality in tilted golden nanowires by means of both linear (reflection and absorption) and nonlinear (second harmonic generation) measurements. [20][21][22][23] III-V semiconductor nanowires (NWs) have been widely investigated since they exhibit good waveguiding properties thus offering a light manipulation at nanoscale. Coupling of the incident light to the discrete leaky waveguide modes above the bandgap in NWs leads to increased resonant absorption, thus paving the way for important applications such as energy harvesting, spectral selectivity, lasing, spin angular momentum generation, etc. [24][25][26][27] Metallic NWs have also been investigated for plasmonic laser applications [28][29][30] and possibility of surface plasmon polaritons excitation. [31] One step further is the partial covering of such NWs with gold: this can induce, along with the proper experiment setup, the symmetry breaking which leads to chiral response.In this paper, for the first time to our knowledge, we report on a circular dichroism behavior from semiconductor hexagonal Semiconductor nanostructures hybridized with metals have been known to offer new opportunities in nonlinear optics, plasmonics, lasing, biosensors; among them GaAs-based nanowires (NWs) hybridized with gold can offer new functionalities, as chiral sensing and light manipulation, as well as circular polarization sources. This study investigates GaAs-AlGaAs-GaAs NWs fabricated by self-catalyzed growth on Si substrates, and partially covered with gold, thus inducing the symmetry breaking and a potential chiral response. Three different samples are investigated, each of them with a different morphology, as the length and the overall diameter ranging from 4.6 to 5.19 µm and from 138 up to 165 nm, respectively. The samples are first char...

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Section: Photoacoustic Technique and Linear Characterizationmentioning

confidence: 99%

Evidence of Optical Circular Dichroism in GaAs‐Based Nanowires Partially Covered with Gold

Leahu

Petronijevic

Belardini

et al. 2017

Advanced Optical Materials

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“…Surface plasmons are readily damped; thus, after a short time, the plasmon will start to decay radiatively, into reemitted photons [23], or nonradiatively [24][25][26] via intraband or interband transitions, forming energetic or "hot" electrons. The plasmon decay processes after excitation are illustrated in Figure 1A.…”

Section: Introductionmentioning

confidence: 99%

Harvesting the loss: surface plasmon-based hot electron photodetection

2016

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Abstract:Although the nonradiative decay of surface plasmons was once thought to be only a parasitic process within the plasmonic and metamaterial communities, hot carriers generated from nonradiative plasmon decay offer new opportunities for harnessing absorption loss. Hot carriers can be harnessed for applications ranging from chemical catalysis, photothermal heating, photovoltaics, and photodetection. Here, we present a review on the recent developments concerning photodetection based on hot electrons. The basic principles and recent progress on hot electron photodetectors are summarized. The challenges and potential future directions are also discussed.

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“…On one hand, damping of a LSPP in a NP can dissipate photon energy into heat. On the other hand, the energy arising from plasmon decay can also be transferred to (i) a single electron of the NP [20][21][22][23][24] or to (ii) an electron present in the vicinity of the NP (e.g., in a defect state located in the band gap of the semiconductor). As shown in Fig.…”

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confidence: 99%

Plasmon-induced photoexcitation of “hot” electrons and “hot” holes in amorphous silicon photosensitive devices containing silver nanoparticles

Moulin

Paetzold

Pieters

et al. 2013

Journal of Applied Physics

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Plasmon-induced photoexcitation of "hot" electrons and "hot" holes in amorphous silicon photosensitive devices containing silver nanoparticles We report on a plasmon-induced photocurrent in photosensitive devices based on hydrogenated amorphous silicon (a-Si:H) containing silver nanoparticles (NPs). The photocurrent is measured in a spectral region corresponding to optical transitions below the band gap of a-Si:H. Photoexcitation of "hot" electrons in the NPs or in defect states present in the vicinity of the NPs, resulting from plasmon decay in the NPs, is often cited as being responsible for this effect. In this study, we demonstrate that plasmon induced photogeneration of "hot" holes is also able to contribute to a photocurrent. A bifacial symmetrical transparent device was prepared in order to compare the internal quantum efficiency of both processes, the first based on the photogeneration of "hot" electrons and the second based on the photogeneration of "hot" holes.

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Photoacoustic observation of nonradiative decay of surface plasmons in silver

Cited by 85 publications

References 10 publications

Evidence of Optical Circular Dichroism in GaAs‐Based Nanowires Partially Covered with Gold

Evidence of Optical Circular Dichroism in GaAs‐Based Nanowires Partially Covered with Gold

Harvesting the loss: surface plasmon-based hot electron photodetection

Plasmon-induced photoexcitation of “hot” electrons and “hot” holes in amorphous silicon photosensitive devices containing silver nanoparticles

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