Gap-mode plasmonic nanocavity

Russell, Kasey J.; Hu, Evelyn L.

doi:10.1063/1.3505154

Cited by 37 publications

(25 citation statements)

References 21 publications

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“…The work by Hu et al [20] validates the assumption of FP cavity for the hybrid plasmonic mode under the ambience condition (n c = 1). The lasing threshold depends on the cavity length L and facet reflectivity R. We evaluate the reflectivity R by numerically solving the reflected optical field with the aid of 3-D FEM.…”

Section: Design For a Plasmonic Lasermentioning

confidence: 64%

“…This mode exhibits modest attenuation and moderate field confinement. Later, Hu et al proposed a hybrid plasmonic nanocavity which consists of a metallic nanowire and substrate sandwiching a dielectric gap layer [20]. Analogous to the active dielectric nanowire in the former case, the gap material in the latter plays the role of gain media, and therefore, the field leakage into the metallic nanowire should be reduced as much as possible.…”

Section: Introductionmentioning

confidence: 99%

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Cladding Effect on Hybrid Plasmonic Nanowire Cavity at Telecommunication Wavelengths

Cheng

Weng

Chang

et al. 2013

IEEE J. Select. Topics Quantum Electron.

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Abstract-In this paper, we investigate the effect of cladding layers on a hybrid plasmonic nanowire cavity. A decent confinement factor and moderate modal loss can be achieved for lasing. Within a certain index range of the cladding layer, the fundamental hybrid plasmonic mode is well confined inside the narrow gain region and becomes the most promising lasing mode. Our results also indicate that the mirror loss can be reduced if the refractive index of the cladding layer is properly chosen. An estimated cold-cavity quality factor of 87, corresponding to a threshold gain of about 1072 cm −1 , is achievable at a cavity length of 10.13 μm for the lasing mode.

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Section: Design For a Plasmonic Lasermentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Cladding Effect on Hybrid Plasmonic Nanowire Cavity at Telecommunication Wavelengths

Cheng

Weng

Chang

et al. 2013

IEEE J. Select. Topics Quantum Electron.

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“…1,[10][11][12][13] Recently, a number of studies have begun to elucidate the mode structure and local field confinement that occurs between closely spaced metallic nanoparticle/film monopole nanoantenna systems. [14][15][16] Both gap and dipole/multipole modes have been identified and their characteristics depend on the distance between the metal nanoparticle and the metal film, and the dimensions of the metal nanoparticle, respectively. Both mode types could be used to modify the properties of molecules or semiconductor "spacer" layers placed between the metal nanoparticle and the metal film.…”

mentioning

confidence: 99%

“…It is necessary for the P3HT film to be sufficiently thin ( 50 nm) to fully benefit from high near-field intensities that can occur when the AuNR couples with the underlying metal layer. [14][15][16][17] To fabricate AuNR/P3HT/Ag samples, first, P3HT was spin coated onto an optically-thick, thermally-evaporated Ag film on glass. Subsequently, a 600-nm-thick, through-hole nanoporous anodic alumina (AAO) mask was placed on top of the P3HT/Ag layers.…”

mentioning

confidence: 99%

Light-management in ultra-thin polythiophene films using plasmonic monopole nanoantennas

Goodman

Abdelaziz

et al. 2012

Applied Physics Letters

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Computational study of energy filtering effects in one-dimensional composite nano-structures J. Appl. Phys. 111, 024508 (2012) Studies of pure and nitrogen-incorporated hydrogenated amorphous carbon thin films and their possible application for amorphous silicon solar cells J. Appl. Phys. 111, 014908 (2012) Thin film contact resistance with dissimilar materials Deposition of vertical, cone-shaped plasmonic nanorod arrays onto sub-50 nm polythiophene films on Ag substrates is shown to result in significant absorption enhancement (>12 at the polythiophene band edge) and spectral broadening (more than 250 nm increase) relative to polythiophene/Ag films without plasmonic nanorod arrays. Full-field electromagnetic simulations are used to identify the modes of the plasmonic nanorod array/polythiophene/Ag film system. Both gap modes and longitudinal monopole antenna modes give rise to highly localized electric fields in the polythiophene film and are the primary contributors to polythiophene absorption enhancement. This approach is suitable for large area optoelectronic applications where light management in ultrathin active layers is desired.

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“…13 Such plasmonic sub-wavelength confinement is intrinsically related to high metal losses, which limits the Q-factor to values well below 100, resulting in Q/V values of 10 5 (λ/n) 3 at best and low transmission values. 14 Several configurations for increasing the Q/V ratio have been investigated, amongst which the hybrid combination of dielectric and plasmonic confinement mechanisms appears to be the most promising. [15][16][17][18][19][20][21] A number of such hybrid cavities have already been studied with the aim to decrease the optical losses with respect to the plasmonic cavities and to provide very low values of mode volume.…”

Section: Introductionmentioning

confidence: 99%

Ultra-high Q/V hybrid cavity for strong light-matter interaction

Conteduca¹,

Reardon²,

Scullion³

et al. 2017

APL Photonics

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COLLECTIONS This paper was selected as Featured ARTICLES YOU MAY BE INTERESTED INThe ability to confine light at the nanoscale continues to excite the research community, with the ratio between quality factor Q and volume V, i.e., the Q/V ratio, being the key figure of merit. In order to achieve strong light-matter interaction, however, it is important to confine a lot of energy in the resonant cavity mode. Here, we demonstrate a novel cavity design that combines a photonic crystal nanobeam cavity with a plasmonic bowtie antenna. The nanobeam cavity is optimised for a good match with the antenna and provides a Q of 1700 and a transmission of 90%. Combined with the bowtie, the hybrid photonic-plasmonic cavity achieves a Q of 800 and a transmission of 20%, both of which remarkable achievements for a hybrid cavity. The ultra-high Q/V of the hybrid cavity is of order of 10 6 (λ/n) 3 , which is comparable to the state-of-the-art of photonic resonant cavities. Based on the high Q/V and the high transmission, we demonstrate the strong efficiency of the hybrid cavity as a nanotweezer for optical trapping. We show that a stable trapping condition can be achieved for a single 200 nm Au bead for a duration of several minutes (t trap > 5 min) and with very low optical power (P in = 190 µW).

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Gap-mode plasmonic nanocavity

Cited by 37 publications

References 21 publications

Cladding Effect on Hybrid Plasmonic Nanowire Cavity at Telecommunication Wavelengths

Cladding Effect on Hybrid Plasmonic Nanowire Cavity at Telecommunication Wavelengths

Light-management in ultra-thin polythiophene films using plasmonic monopole nanoantennas

Ultra-high Q/V hybrid cavity for strong light-matter interaction

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