Enhanced fields on rough surfaces: dipolar interactions among particles of sizes exceeding the Rayleigh limit

Meier, M. M. M.; Wokaun, Alexander; Liao, P. F.

doi:10.1364/josab.2.000931

Cited by 203 publications

(160 citation statements)

References 76 publications

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“…Prism coupling creates an evanescent wave owing to total internal reflection at the PI-air interface, strongly reducing interfacial background scattering, but does not occur at the substrate-PI interface. Although diffractive coupling in nanostructure arrays typically is studied using normal incidence (18,(31)(32)(33), it can also be achieved using the off-normal angles of incidence used here (28,(34)(35)(36)(37). Images were obtained by mounting a digital single-lens reflex (DSLR) camera into the eyepiece of the microscope; spectra were obtained by directing the signal toward a CCD camera attached to a spectrograph.…”

Section: Resultsmentioning

confidence: 99%

Vivid, full-color aluminum plasmonic pixels

Olson

Manjavacas

Liu

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

283

255

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Aluminum is abundant, low in cost, compatible with complementary metal-oxide semiconductor manufacturing methods, and capable of supporting tunable plasmon resonance structures that span the entire visible spectrum. However, the use of Al for color displays has been limited by its intrinsically broad spectral features. Here we show that vivid, highly polarized, and broadly tunable color pixels can be produced from periodic patterns of oriented Al nanorods. Whereas the nanorod longitudinal plasmon resonance is largely responsible for pixel color, far-field diffractive coupling is used to narrow the plasmon linewidth, enabling monochromatic coloration and significantly enhancing the far-field scattering intensity of the individual nanorod elements. The bright coloration can be observed with p-polarized white light excitation, consistent with the use of this approach in display devices. The resulting color pixels are constructed with a simple design, are compatible with scalable fabrication methods, and provide contrast ratios exceeding 100:1.RGB | chromaticity | array | electron beam lithography D isplay technologies have been evolving toward vivid, fullcolor, flat-panel displays with high resolution and/or small pixel sizes, higher energy efficiency, and improved benefit/cost ratios. Some of the most popular current technologies are liquid crystal displays (LCD), laser phosphor displays, also known as electroluminescent displays, and light-emitting diode (LED)-based displays. A common characteristic of all color display technologies is the incorporation of various color-producing media, which can be inorganic, organic, or polymeric materials, into the device. These chromatic materials are chosen to produce the fundamental components of the color spectrum in additive color schemes such as the standard red-green-blue (sRGB) when illuminated by an internal light source or when an electrical voltage is applied.Inorganic chromatic materials have the potential to greatly extend the durability and lifetime of color displays. Inorganic nanoparticles have recently begun to be used in color displays in the form of quantum dot LEDs, which have excellent display lifetimes and industry-scalable, size-based, and material-based color tunability (1-3). However, obtaining blue colors from quantum dots has been challenging (4) owing to the requirement of synthesizing nanoparticles in the small size range required to achieve optical transitions in this wavelength range. Au nanoparticles can produce green and red colors based on their surface plasmon resonances (5), but shorter-wavelength hues are quenched because of interband transitions for wavelengths below 520 nm (6). Ag has also been investigated for display applications (7, 8), but although spectral features can be achieved across the visible region the material readily oxidizes (9, 10), requiring additional passivation layers.Al is potentially a highly attractive material for plasmon-based full-spectrum displays. Al is the third most abundant element in the earth's crust, beh...

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Section: Resultsmentioning

confidence: 99%

Vivid, full-color aluminum plasmonic pixels

Olson

Manjavacas

Liu

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

283

255

View full text Add to dashboard Cite

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“…This effect arises from the near-field diffraction of the incident light by the grating formed by the nanoantenna array [26][27][28][29] . When the incident light matches the critical grating period…”

Section: Resultsmentioning

confidence: 99%

Understanding and controlling plasmon-induced convection

et al. 2014

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The heat generation and fluid convection induced by plasmonic nanostructures is attractive for optofluidic applications. However, previously published theoretical studies predict only nanometre per second fluid velocities that are inadequate for microscale mass transport. Here we show both theoretically and experimentally that an array of plasmonic nanoantennas coupled to an optically absorptive indium-tin-oxide (ITO) substrate can generate 4micro-metre per second fluid convection. Crucially, the ITO distributes thermal energy created by the nanoantennas generating an order of magnitude increase in convection velocities compared with nanoantennas on a SiO 2 base layer. In addition, the plasmonic array alters absorption in the ITO, causing a deviation from Beer-Lambert absorption that results in an optimum ITO thickness for a given system. This work elucidates the role of convection in plasmonic optical trapping and particle assembly, and opens up new avenues for controlling fluid and mass transport on the micro-and nanoscale.

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“…When λ eff > Λ, only the zeroth-order diffraction appears and the higher orders are non-radiative. But when Λ ≥ λ eff , diffractive farfield interaction can arise [41,42,46]. However, the effect might be weak in the HDSC nanoantenna arrays, as the scattering is reduced compared to the nonradiative decay channel as shown above.…”

Section: Interaction Range In Highly Doped Inassb Nanoantenna Arraysmentioning

confidence: 94%

“…Different interaction regimes in nanoparticle arrays have been identified in the literature, based mainly on examples of metallic, often Au and Ag nanoparticles [41][42][43][44][45][46]. Near-field interactions arise for gaps between antennas in the range of several tenths of nanometers.…”

Section: Interaction Range In Highly Doped Inassb Nanoantenna Arraysmentioning

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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Enhanced fields on rough surfaces: dipolar interactions among particles of sizes exceeding the Rayleigh limit

Cited by 203 publications

References 76 publications

Vivid, full-color aluminum plasmonic pixels

Vivid, full-color aluminum plasmonic pixels

Understanding and controlling plasmon-induced convection

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

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