Optical transmission properties of a single subwavelength aperture in a real metal

Degiron, Aloyse; Lezec, Henri J.; Yamamoto, Naoki; Ebbesen, Thomas W.

doi:10.1016/j.optcom.2004.05.058

Cited by 377 publications

(297 citation statements)

References 28 publications

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“…A limiting factor for many applications is that the transmission process is severely impaired if the lateral hole dimension is smaller than the wavelength of light. 1 In the last 15 years, several instances have been found in which light transmission through small holes is enhanced: (i) in arrays of subwavelength holes 2 and single holes surrounded by surface corrugations, 3 where light scattered by each hole, instead of being reflected, couples to surfaces modes, which allows the buildup of constructive interferences; 4,5 (ii) through localized resonances in single subwavelength holes, 6,7 occurring close to the cutoff frequency of the hole, which can be seen either as a zero-order Fabry-Perot resonance 8 or transmission in an epsilon-near-zero material; 9 and (iii) for Brewster-angle transmission, 10 appearing at oblique illumination when the holey surface is impedance matched to the medium of incidence. All these phenomena are now generically known as extraordinary optical transmission (EOT).…”

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confidence: 99%

Theory of absorption-induced transparency

2013

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Recent experiments [Hutchison, O'Carroll, Schwartz, Genet, and Ebbesen, Angew. Chem. Int. Ed. 50, 2085 (2011)] have demonstrated that optical transmission through an array of subwavelength holes in a metal film can be enhanced by the intentional presence of dyes in the system. As the transmission maximum occurs spectrally close to the absorption resonances of the dyes, this phenomenon was christened "absorption induced transparency". Here, a theoretical study on absorption induced transparency is presented. The results show that the appearance of transmission maxima requires that the absorbent fills the holes and that it occurs also for single holes. Furthermore, it is shown that the transmission process is nonresonant, being composed by a sequential passage of the electromagnetic field through the hole. Finally, the physical origin of the phenomenon is demonstrated to be nonplasmonic, which implies that absorption induced transparency should also occur at the infrared or terahertz frequency regimes.

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confidence: 99%

Theory of absorption-induced transparency

2013

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“…On the other hand, recent studies on isolated rectangular holes have shown the same effects of a resonance in transmission and a redshift that arises when reducing the width of the hole. 14 To explain how the shape-controlled resonance wavelength arises from a single hole, the influence of the hole shape on the cutoff wavelength of the modes within the hole was considered. 15 It was shown that the cutoff wavelength increases for a real metal due to increased coupling between evanescent fields on the long edges inside the hole.…”

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“…This set of geometrical parameters corresponds to the ones used in the experiments. 14 The system is illuminated by a normally incident p-polarized plane wave of wavelength , the E field pointing along the y direction.…”

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Transmission of light through a single rectangular hole in a real metal

et al. 2006

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A theory is presented to describe the optical transmission through a rectangular hole in a real metal film. The previous theory of the transmission through a rectangular hole in a perfect electric conductor is extended to include the effects associated with having a real metal by adding surface-impedance boundary conditions and an effective index mode calculation. Both the peak and amplitude of the Fabry-Pérot resonance of the fundamental mode agree quantitatively with experiments. Finite-difference time-domain calculations are used to verify the theoretical findings as well as to show the effects of including loss, which is not included in the theory. The localized nature of the transmission resonances is also revealed by analyzing the electric field maps associated with the enhanced transmission process. DOI: 10.1103/PhysRevB.74.153411 PACS number͑s͒: 78.66.Bz, 42.25.Bs, 41.20.Jb, 42.79.Ag Observations of extraordinary optical transmission through arrays of subwavelength holes in metal films have spurred on intense research activity into understanding and utilizing this phenomenon. 1-10 Recent works have experimented with the effects on transmission that arise from changing the hole shape. [11][12][13] The main findings of those works is that elliptical or rectangular holes can dramatically influence the polarization, the resonance wavelength, and the intensity of the transmission. Random arrays of rectangular holes were used to demonstrate that a resonance exists in the transmission spectrum which is governed by the shape of the individual hole. 12 The peak wavelength of the resonance could be redshifted by decreasing the width of the short side of the hole. On the other hand, recent studies on isolated rectangular holes have shown the same effects of a resonance in transmission and a redshift that arises when reducing the width of the hole. 14 To explain how the shape-controlled resonance wavelength arises from a single hole, the influence of the hole shape on the cutoff wavelength of the modes within the hole was considered. 15 It was shown that the cutoff wavelength increases for a real metal due to increased coupling between evanescent fields on the long edges inside the hole. Later, the origin of the resonance was explained with a theory that incorporated the coupling between the mode inside the hole with the free-space regions on either side of the film. 16 The physical nature of this effect was attributed to a Fabry-Pérot resonance due to multiple reflections of the mode within the hole at the interfaces with the free-space regions. That theory did not capture the observed redshift phenomenon that arises when the width of the hole is reduced in a real metal because it considered only a perfect electric conductor.In this paper, a theory that describes quantitatively the transmission resonance for a rectangular hole in a metal film is presented. Here, the previous theory has been generalized to allow for a finite dielectric constant, and thereby captures the new physics associated with having a real ...

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“…In consequence of the anisotropy of the side lengths of the rectangular nanoantennas, a strong polarization dependence of the optical response is expected [36,37]. Figure 2 displays the reflectance spectra of an array with periodicities Λ x = 1.4 μm, Λ y = 2.0 μm of resonators with side lengths w x = 400 ± 30 nm and w y = 810 ± 30 nm, obtained with unpolarized and polarized light.…”

Section: Optical Characterizationmentioning

confidence: 99%

Highly doped semiconductor plasmonic nanoantenna arrays for polarization selective broadband surface-enhanced infrared absorption spectroscopy of vanillin

et al. 2017

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Tailored plasmonic nanoantennas are needed for diverse applications, among those sensing. Surfaceenhanced infrared absorption (SEIRA) spectroscopy using adapted nanoantenna substrates is an efficient technique for the selective detection of molecules by their vibrational spectra, even in small quantity. Highly doped semiconductors have been proposed as innovative materials for plasmonics, especially for more flexibility concerning the targeted spectral range. Here, we report on rectangularshaped, highly Si-doped InAsSb nanoantennas sustaining polarization switchable longitudinal and transverse plasmonic resonances in the mid-infrared. For small array periodicities, the highest reflectance intensity is obtained. Large periodicities can be used to combine localized surface plasmon resonances (SPR) with array resonances, as shown in electromagnetic calculations. The nanoantenna arrays can be efficiently used for broadband SEIRA spectroscopy, exploiting the spectral overlap between the large longitudinal or transverse plasmonic resonances and narrow infrared active absorption features of an analyte molecule. We demonstrate an increase of the vibrational line intensity up to a factor of 5.7 of infrared-active absorption features of vanillin in the fingerprint spectral region, yielding enhancement factors of three to four orders of magnitude. Moreover, an optimized readout for SPR sensing is proposed based on slightly overlapping longitudinal and transverse localized SPR.

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Optical transmission properties of a single subwavelength aperture in a real metal

Cited by 377 publications

References 28 publications

Theory of absorption-induced transparency

Theory of absorption-induced transparency

Transmission of light through a single rectangular hole in a real metal

Highly doped semiconductor plasmonic nanoantenna arrays for polarization selective broadband surface-enhanced infrared absorption spectroscopy of vanillin

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