Second-harmonic generation from an array of sub-wavelength metal apertures

Airola, Marc B.; Liu, Y; Blair, Steve

doi:10.1088/1464-4258/7/2/016

Cited by 89 publications

(65 citation statements)

References 28 publications

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“…Third, the SHG signal at 415 nm from both a plain glass substrate and a plain Au film is checked to stay below noise level. It may seem surprising that an SHG signal is obtained from this centrosymmetric structure using excitation and detection angles that are perpendicular to the sample [8,19]. We remark, however, that symmetry breaking at an interface can be sufficient to generate a scattered beam of second-harmonics (SH) light [20], which can be detected if the collection NA is large enough to include such scattering angles [4].…”

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confidence: 92%

“…Calculations indicate that the local field enhancement associated with the transmission through the holes is exceptionally large [7]. Blair and co-workers showed that second-harmonics generation (SHG) on a hole array is possible [8]. …”

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confidence: 99%

“…Shape may explain why 1 out of 100 to 1000 nanoparticles exhibits high SERS enhancement efficiencies and are called ''hot particles'' [2]. Shape can also break mirror symmetry to allow SHG [8,9]. Changing the shape of subwavelength holes in periodic arrangements affects the linear transmission properties of the array [10 -13].…”

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confidence: 99%

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Strong Modification of the Nonlinear Optical Response of Metallic Subwavelength Hole Arrays

et al. 2006

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The influence of hole shape on the nonlinear optical properties of metallic subwavelength hole arrays is investigated. It is found that the amount of second harmonics generated can be enhanced by changing the hole shape. In part this increase is a direct result of the effect of hole shape on the linear transmission properties. Remarkably, in addition to enhancements that follow directly from the linear properties of the array, we find a hot hole shape. For rectangular holes the effective nonlinear response is enhanced by more than 1 order of magnitude for one particular aspect ratio. This enhancement can be attributed to slow propagation of the fundamental wavelength through the holes which occurs close to the hole cutoff. Metal nanostructures are known to greatly enhance electromagnetic fields in certain geometries. Therefore they can also boost nonlinear optics. Surface-enhanced Raman scattering (SERS) [1], for instance, makes use of nobel metal nanoparticles to amplify the spectroscopic Raman signature of even a single molecule [2]. Sharp nanosize tips [3] provide a more controlled route to enhance the optical field. Another powerful example of nonlinear enhancement is a single circular hole, surrounded by an ordered plasmonic structure [4]. In addition to the use of single structures, ensembles of multiple nanostructures or extended metal objects can also be used to induce nonlinear enhancement randomly positioned metal nanoclusters show nonlinear effects [5]. A popular example of multiple nanostructures acting together is a subwavelength hole array which exhibits extraordinary optical transmission [6] in the linear regime. Calculations indicate that the local field enhancement associated with the transmission through the holes is exceptionally large [7]. Blair and co-workers showed that second-harmonics generation (SHG) on a hole array is possible [8].

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Strong Modification of the Nonlinear Optical Response of Metallic Subwavelength Hole Arrays

et al. 2006

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“…On the one hand, an electromagnetic wave incident on a resonant sub-wavelength structure can efficiently couple to surface plasmon polaritons (SPP) leading to EOT, 21,22 resulting in high FE in the apertures. [23][24][25][26][27][28] On the other hand, a single infinitely long narrow slit was shown to lead to a significant field enhancement inside the slit leading to broadband EOT. 29,30 A slit etched in a thin metal film can be depicted as a nanocapacitor charged by the light-induced charges on the surrounding metal surface.…”

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Skirting terahertz waves in a photo-excited nanoslit structure

Shalaby

Fabiańska

Peccianti

et al. 2014

Applied Physics Letters

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Terahertz fields can be dramatically enhanced as they propagate through nanometer-sized slits. The enhancement is mediated by a significant accumulation of the induced surface charges on the surrounding metal. This enhancement is shown here to be dynamically modulated while the nanoslits are gradually shunted using a copropagating optical beam. The terahertz fields are found to skirt the nanoscale photo-excited region underneath the slits, scattering to the far field and rigorously mapping the near field.

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“…Bistability was observed in hole arrays coated with a nonlinear polymer [57]. Second harmonic generation (SHG) was observed by illuminating the holes with high intensity femtosecond laser pulses [58]. Nieuwstadt and coworkers investigated the role of hole shape on the second harmonic generation efficiency.…”

Section: Arrays Of Subwavelength Holesmentioning

confidence: 99%

Local and dynamic properties of light interacting with subwavelength holes

Prangsma

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Second-harmonic generation from an array of sub-wavelength metal apertures

Cited by 89 publications

References 28 publications

Strong Modification of the Nonlinear Optical Response of Metallic Subwavelength Hole Arrays

Strong Modification of the Nonlinear Optical Response of Metallic Subwavelength Hole Arrays

Skirting terahertz waves in a photo-excited nanoslit structure

Local and dynamic properties of light interacting with subwavelength holes

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