Ultra-sensitive vibrational spectroscopy of protein monolayers with plasmonic nanoantenna arrays

Adato, Ronen; Yanik, Ahmet Ali; Amsden, Jason J.; Kaplan, David L.; Omenetto, Fiorenzo G.; Hong, Mineui; Erramilli, Shyamsunder; Altug, Hatice

doi:10.1073/pnas.0907459106

Cited by 598 publications

(727 citation statements)

References 32 publications

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“…34 Transverse coupling strongly limits the integration density that can be achieved for Au antennas. 22,25,26,34,35 Compared to Au, the spectral resonance positions for ITO antenna arrays in Figure 2b We compare our experimental results with the nonradiative and radiative contributions to Q tot defined according to Q tot = ω res /Γ tot with Γ tot = Γ NR + Γ R the total decay rate and ω res the resonance angular frequency. For the nonradiative contribution we use the general expression for a dipole oscillator Γ N R = 2ϵ 2 /(∂ϵ 1 /∂ω).…”

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confidence: 99%

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Surface-Enhanced Infrared Spectroscopy Using Metal Oxide Plasmonic Antenna Arrays

et al. 2013

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We successfully demonstrate surface enhanced infrared spectroscopy (SEIRS) using arrays of indium-tin oxide (ITO) plasmonic nanoantennas. The ITO antennas show a strongly reduced plasmon wavelength, which holds promise for ultracompact antenna arrays and extremely subwavelength metamaterials. The strong plasmon confinement and reduced antenna cross section allows ITO antennas to be integrated at extremely high densities with no loss in performance due to long-range transverse interactions.

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confidence: 99%

“…1 Au antennas have been shown to produce a strong SEIRS response. [21][22][23][24][25][26][27][28][29] For the SEIRS experiments, we used a thin, 50-nm layer of PMMA which was spincoated onto the antenna arrays. The presence of the PMMA can be observed in Fig.…”

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confidence: 99%

Surface-Enhanced Infrared Spectroscopy Using Metal Oxide Plasmonic Antenna Arrays

et al. 2013

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“…2a). It is noteworthy that such plasmon-enhanced infrared absorption based on noble metals has produced an emerging field of spectroscopy techniques for surfaces and bio-molecules 27 .…”

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confidence: 99%

Tunable Phonon-Induced Transparency in Bilayer Graphene Nanoribbons

et al. 2014

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In the phenomenon of electromagnetically induced transparency 1 (EIT) of a threelevel atomic system, the linear susceptibility at the dipole-allowed transition is canceled through destructive interference of the direct transition and an indirect transition pathway involving a meta-stable level, enabled by optical pumping. EIT not only leads to light transmission at otherwise opaque atomic transition frequencies, but also results in the slowing of light group velocity and enhanced optical nonlinearity 2 . In this letter, we report an analogous behavior, denoted as phonon-induced transparency (PIT), in AB-stacked bilayer graphene nanoribbons.Here, light absorption due to the plasmon excitation is suppressed in a narrow window due to the coupling with the infrared active Γ-point optical phonon 3,4 , whose function here is similar to that of the meta-stable level in EIT of atomic systems. We further show that PIT in bilayer graphene is actively tunable by electrostatic gating, and estimate a maximum slow light factor of around 500 at the phonon frequency of 1580 cm -1 , based on the measured spectra. Our demonstration opens an avenue for the exploration of few-photon non-linear optics 5 and slow light 2 in this novel two-dimensional material, without external optical pumping and at 1

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“…While numerous studies have been carried out on metallic nanoantennas, either as individual objects [12][13][14][15][16][17], or organized in arrays [1,10,[18][19][20][21], semiconductor plasmonic nanoantenna surfaces have rarely been investigated [22], especially in ordered array arrangements [23][24][25]. Highly doped semiconductors (HDSC) have been introduced as engineered metals or "designed metals" for plasmonics [22,23] as they offer the possibility of tuning the plasma frequency, an intrinsic parameter for traditional metals, via the doping level.…”

Section: Introductionmentioning

confidence: 99%

“…Surfaces with adjustable optical properties are extensively studied and of interest for sensing [1][2][3][4], controlled light absorption [5], color printing [6][7][8], among other applications. Plasmonics is one approach to enable special optical properties, like intense reflection, absorption or transmission in a targeted wavelength range.…”

Section: Introductionmentioning

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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Ultra-sensitive vibrational spectroscopy of protein monolayers with plasmonic nanoantenna arrays

Abstract: surface plasmons ͉ SEIRA ͉ surface enhancements ͉ near-field effects ͉ infrared absorption spectroscopy

Cited by 598 publications

References 32 publications

Surface-Enhanced Infrared Spectroscopy Using Metal Oxide Plasmonic Antenna Arrays

Surface-Enhanced Infrared Spectroscopy Using Metal Oxide Plasmonic Antenna Arrays

Tunable Phonon-Induced Transparency in Bilayer Graphene Nanoribbons

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

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