Light emission from the shadows: Surface plasmon nano-optics at near and far fields

Hohng, S. C.; Yoon, Y. C.; Kim, D. S.; Malyarchuk, Viktor; Müller, Roland; Lienau, Christoph; Park, J. W.; Yoo, Kyung Hee; Kim, J.; Ryu, Han-Youl; Park, Q. H.

doi:10.1063/1.1515134

Cited by 71 publications

(51 citation statements)

References 18 publications

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“…This fact simplifies the calculation and allows the development of a theory that limits the treatment to the half-space that starts at the exit surface. The result of such theory should be consistent with other results, like the one that shows light originating from the non-illuminated part of the exit surface [8] or interference fringes in between transmission through slits [9].…”

Section: Predicting the Near/far-field Of Eotsupporting

confidence: 87%

Measuring the near-field of extraordinary transmission through a periodic hole-array

et al. 2006

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The knowledge of the near-field of extra-ordinary transmission through hole-arrays is mostly theoretical; there is less experimental validation of the theory. We study the near-field properties by measuring fluorescent molecules that are immersed in a solution and their Brownian motion. The measurements are performed by filling the space above the hole-array with fluorescent solution and exciting these molecules through the hole-array. By measuring both the fluorescence and the direct exciting light, it is possible to learn about the near-field properties.

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Section: Predicting the Near/far-field Of Eotsupporting

confidence: 87%

Measuring the near-field of extraordinary transmission through a periodic hole-array

et al. 2006

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“…A key feature of SPPs is that the electric field associated with them is polarized [15,16]. Transmittance dispersion data were acquired for p-and s-polarized light (Fig.…”

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confidence: 99%

Surface Plasmon Polaritons and Their Role in the Enhanced Transmission of Light through Periodic Arrays of Subwavelength Holes in a Metal Film

et al. 2004

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We present results of the transmitted, reflected, and absorbed power associated with the enhanced transmittance of light through a silver film pierced by a periodic array of subwavelength holes. Comparing experimentally acquired dispersion curves under different polarization conditions shows that the transmission features of the array are consistent with p-polarized resonant modes of the structure. By exploring the regime in which no propagating diffracted orders are allowed, we further show that the transmittance maxima are associated with both reflectance minima and absorption maxima. These new results provide strong experimental evidence for transmission based on diffraction, assisted by the enhanced fields associated with surface plasmon polaritons. DOI: 10.1103/PhysRevLett.92.107401 PACS numbers: 78.20.Ci, 41.20.Jb, 42.25.Fx, 73.20.Mf The observation of the enhanced transmission of light through a metallic film perforated by an array of subwavelength holes [1] sparked a wealth of research seeking to explain the underlying physics. For light of wavelength , a hole less than =2 in diameter in a thick metal film does not support any propagating modes; energy can propagate only by an evanescent tunneling process leading to very weak transmittance -in marked contrast to the experimental observations.Initial explanations considered coupling of the incident light via diffraction to surface plasmon polariton (SPP) modes of the metallic structure [1,2]. Many different theoretical approaches have since been adopted, all replicating the normal incidence transmission spectra [3][4][5][6][7]; consequently, more than just the normal incidence transmission spectrum needs to be explored if one is to obtain a clearer picture of the underlying physics. Despite a convergence of views among many theorists that the enhanced transmission involves multiple diffraction enhanced by SPPs [5][6][7][8][9], there remains some controversy surrounding the transmission mechanism; not all authors agree that surface plasmons are involved. (Note that explanations based on results from 1D arrays of slits cannot be used, and the physics is very different; sub-=2 slits can support propagating modes, while sub-=2 holes cannot [10].) As noted elsewhere [8], the experimental evidence obtained thus far is consistent with the involvement of SPPs rather than conclusive about their involvement. We present new experimental data not just of the transmittance, but also of the reflectivity and absorbance. We investigate two unexplored far-field signatures of SPPs in this context, their polarized nature and their dissipative character; we are thus able to identify the role played by SPPs in the transmission process.Diffraction is central to the transmission process. Diffraction of the incident plane wave by the array produces waves with the required evanescent character; diffraction of the transmitted evanescent wave on the far side of the array then produces the propagating transmitted light. However, these diffraction processes are independent of the...

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“…The transmission pattern in Fig. 5c shows large similarity with Near field Scanning Optical Microscope (NSOM) measurements [17][18][19]. However, when using the NSOM, the field pattern most likely changes as a result of the near-field tip, and the actual field pattern is therefore difficult to predict.…”

Section: Resultsmentioning

confidence: 69%

Structured illumination microscopy using extraordinary transmission through sub-wavelength hole-arrays

Docter

2007

J. Nanophoton

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Abstract.A new microscopy method for multi diffraction-limited spot illumination is based on extraordinary light transmission through a periodic metal grid (typical period of 600 nm) of sub-wavelength holes (150 nm). Multiple spots illuminate a fluorescently labeled sample and the emission is collected by far-field optics. Theoretical comparison with a confocal microscope reveals equivalent spot sizes and a scanning method with the advantage of multiple illumination spots. The system is used to measure the actual transmitted field with a fluorescent sample in far-field. The obtained results are consistent with the theoretical prediction and provide a proof of concept of the midfield microscope.

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Light emission from the shadows: Surface plasmon nano-optics at near and far fields

Cited by 71 publications

References 18 publications

Measuring the near-field of extraordinary transmission through a periodic hole-array

Measuring the near-field of extraordinary transmission through a periodic hole-array

Surface Plasmon Polaritons and Their Role in the Enhanced Transmission of Light through Periodic Arrays of Subwavelength Holes in a Metal Film

Structured illumination microscopy using extraordinary transmission through sub-wavelength hole-arrays

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