Theory of Highly Directional Emission from a Single Subwavelength Aperture Surrounded by Surface Corrugations

Martín‐Moreno, Luis; García‐Vidal, F. J.; Lezec, Henri J.; Degiron, Aloyse; Ebbesen, Thomas W.

doi:10.1103/physrevlett.90.167401

Cited by 559 publications

(341 citation statements)

References 12 publications

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“…There have been subsequent theoretical and experimental studies of this aperture -groove structure [10][11][12][13][14] , but there have been very few attempts to integrate this structure into an active device [15][16][17] .…”

Section: Introductionmentioning

confidence: 99%

Small-divergence semiconductor lasers by plasmonic collimation

et al. 2008

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Surface plasmons offer the exciting possibility of improving the functionality of optical devices through the subwavelength manipulation of light. We show that surface plasmons can be used to shape the beams of edge-emitting semiconductor lasers and greatly reduce their large intrinsic beam divergence. Using quantum cascade lasers as a model system, we show that by defining a metallic subwavelength slit and a grating on their facet, a small beam divergence in the laser polarization direction can be achieved. Divergence angles as small as 2.48 8 8 8 8 are obtained, representing a reduction in beam spread by a factor of 25 compared with the original 9.9-mm-wavelength laser used. Despite having a patterned facet, our collimated lasers do not suffer significant reductions in output power ( 100 mW at room temperature). Plasmonic collimation provides a means of efficiently coupling the output of a variety of lasers into optical fibres and waveguides, or to collimate them for applications such as free-space communications, ranging and metrology.

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Section: Introductionmentioning

confidence: 99%

Small-divergence semiconductor lasers by plasmonic collimation

et al. 2008

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“…Further modifications of the original configuration have been studied. For example, grooves have been introduced on the exit surface to obtain more collimated beams of transmitted light [7][8][9]. The transmission enhancement of all suggested patterns is moderate, however.…”

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confidence: 99%

Giant Optical Transmission of a Subwavelength Slit Optimized Using the Magnetic Field Phase

2007

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In this Letter, we show that the energy equivalent to that incident on a 4:7 m wide strip can be squeezed through a 50 nm wide slit in a metal film surrounded by grooves. This corresponds to a transmission efficiency of 9400%, which can be even further enhanced by increasing the number of grooves. We use the phase of the magnetic field to explain that the ideal slit-to-groove distance is just over half the plasmon wavelength. In addition, we also optimize the groove depth and width. Such optimized transmission enhancement is very important for near-field devices.

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“…Next I study the impact of film thickness, hole radius, and lattice constant on the transmission profile for the purpose of identifying a mechanism for EOT. Surface plasmon polaritons tied to the interface between a dielectric and a metal have been included in a possible mechanism [34,35]. While the exact role of surface waves in EOT has been a matter of debate, they help to explain the results reported herein.…”

Section: Resultsmentioning

confidence: 61%

The Role of Hybrid Modes in Extraordinary Optical Transmission Through a Plasmonic Nanohole Array

Trampel¹

2017

PIER C

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Abstract-A mode-matching solution to plane wave scattering by a plasmonic nanohole array consisting of a silver film perforated by an infinite square array of circular holes is presented. A complete orthonormal basis set consisting of waveguide modes satisfying an impedance boundary condition on the hole wall is derived. Impedance boundary conditions are satisfied on the upper and lower horizontal surfaces of the film and on the walls of the hole. Extraordinary optical transmission (EOT) is studied over optical wavelengths. Theory predicts a peak transmission value that is in better agreement with experiment than previous modal studies. The effect of film thickness on coupling between modes bound to the upper and lower surfaces is studied. The transmission profile for thinner films evinces two peaks at different wavelengths resulting from strong coupling between surface waves bound to the upper and lower surfaces. For thicker films, the surface waves decouple and a single peak is observed. The effect of hole radius on EOT is considered. It is demonstrated that transmission peaks occur for holes of a roughly constant electrical size. A relationship between the lattice constant and the transmission-to-area efficiency is quantified.

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Theory of Highly Directional Emission from a Single Subwavelength Aperture Surrounded by Surface Corrugations

Cited by 559 publications

References 12 publications

Small-divergence semiconductor lasers by plasmonic collimation

Small-divergence semiconductor lasers by plasmonic collimation

Giant Optical Transmission of a Subwavelength Slit Optimized Using the Magnetic Field Phase

The Role of Hybrid Modes in Extraordinary Optical Transmission Through a Plasmonic Nanohole Array

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