Nanometer scale light focusing with high cavity-enhanced output

Consonni, Marianne; Hazart, J.; Lérondel, Gilles; Vial, Alexandre

doi:10.1063/1.3112003

Cited by 5 publications

(6 citation statements)

References 23 publications

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“…Such lens allows for high transmission at λ = 550 nm with focal spot of 250 nm, that is just a bit less than a half of the wavelength. A subwavelength focusing of the λ = 532 nm monochromatic light into the spot of λ/10 with the transmittivity of 30% was numerically shown in [77]. Such high transmittivity is reached by adding a resonator to the entrance of the lens.…”

Section: Plasmonic Lensmentioning

confidence: 95%

Nanocouplers for Infrared and Visible Light

Andryieuski

Lavrinenko

2012

Advances in OptoElectronics

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An efficient and compact coupler -a device that matches a micro-waveguide and a nano-waveguide -is an essential component for practical applications of nanophotonic systems. The number of coupling approaches has been rapidly increasing in the past ten years with the help of plasmonic structures and metamaterials. In this paper we overview recent as well as common solutions for nanocoupling. More specifically we consider the physical principles of operation of the devices based on a tapered waveguide section, a direct coupler, a lens and a scatterer and support them with a number of examples.Nevertheless, the problem is not only to create efficient waveguides that provide subwavelength mode confinement, but also to make an efficient interface between free space or an optical fiber and a subwavelength nanowaveguide, that is to focus light and launch it efficiently into the waveguide. The artistic view of the situation is depicted in Fig. 1. Trying to pour water from a big bowl into a bottle with a narrow bottleneck, one would waste a lot. However, usage of a funnel simplifies the task and increases the efficiency significantly. An optical coupler plays the role of a funnel for light.

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Section: Plasmonic Lensmentioning

confidence: 95%

Nanocouplers for Infrared and Visible Light

Andryieuski

Lavrinenko

2012

Advances in OptoElectronics

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“…The fabrication of the nanoapertures with periodic groove patterns was reported to enhance the optical intensity through the tiny aperture [3][4][5][6]9]. The pyramidal probe has been found to provide excellent light confinement inside a V-shaped cavity and enhanced optical throughput via cavity resonance and nanofocusing [3,[8][9][10][11]. Hence, the metallic nanostructure with an inverted pyramidal pit array would provide the immensely enhanced optical intensity for surface plasmonic Raman spectroscopy (SERS) [12].…”

Section: Introductionmentioning

confidence: 99%

Toward Next Generation Plasmonic Nanopore Slit Platform with a ~10 nm Slit-Width

Choi¹,

Bae²,

Lee³

et al. 2021

RPM

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We fabricated various nanoaperture plasmonic platforms for single-molecule detection. We fabricated nanoapertures like nanopores on a pyramid and nanoslits on an Au flat membrane using a Ga ion focused ion beam drilling technique, followed by irradiating with a high energy electron beam, dependent on the electron beam current density to obtain nanoapertures with a few nanometer sizes (circular nanopore, nanoslit pores). We examined their optical characteristics with varying aperture sizes and sample thicknesses. We obtained broad emission spectra in the visible and infrared region from the (7 x 7) slit array and a sharp, strong infrared emission peak from the Au nanoparticle on the substrate. The fabricated Au platform with ~10 nm nanometer opening can be employed as a single-molecule sensor and an infrared thermal emission device.

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“…The proposed optical funnel containing a metal-dielectric photonic crystal in [18] reaches only 13% of transmission and the tapered metallic wire proposed in [19] and experimentally fabricated in [20] shows a transmission of 20%. In addition, light could be tightly focused using dielectric lenses that achieve a maximal coupling efficiency of 45% [21] or plasmonic ones leading to a low transmission not exceeding 30% [22]. In order to achieve an effective coupling, other studies used scatterer couplers based on antennas or diffraction gratings.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of an efficient light focusing nano-coupler based on C-shaped waveguides

et al. 2021

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We present an FDTD simulation study of a new design of light focusing nano-coupler consisting of a tapered succession of C-shaped silver waveguides. Its operation is based on the use of the fundamental guided mode T E 10 . Thanks to the optimization of the structural design parameters, we have demonstrated numerically that this compact coupler enables a sub-wavelength light focusing with a transmission coefficient of 65% and a coupling efficiency of 77% that have

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Nanometer scale light focusing with high cavity-enhanced output

Cited by 5 publications

References 23 publications

Nanocouplers for Infrared and Visible Light

Nanocouplers for Infrared and Visible Light

Toward Next Generation Plasmonic Nanopore Slit Platform with a ~10 nm Slit-Width

Numerical study of an efficient light focusing nano-coupler based on C-shaped waveguides

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