Surface plasmon sorting and engineered dispersion curves using multilayer doped semiconductors

Jung, Young Uk; Mandel, Isroel M.; Bendoym, Igor; Golovin, Andrii B.; Crouse, David T.

doi:10.1364/josab.32.001007

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…Because of the low bandgap of InSb (E g = 170 meV), its intrinsic electron density at room temperature is about 10 16 cm −3 , which corresponds to the bulk plasma frequency (ω 2 p = ne 2 /ǫ 0 ǫ ∞ m * ) of ω p /2π ∼ 1.8 THz. Propagating and localized surface plasmons on InSb surfaces and microstructures have been studied actively in recent years [14][15][16][17][18][19][20] , and the potential for THz sensing and spectroscopy has been pointed out 21 .…”

Section: Introductionmentioning

confidence: 99%

Thin InSb layers with metallic gratings: a novel platform for spectrally-selective THz plasmonic sensing

Lin¹,

Bhattarai²,

Zhou³

et al. 2016

Opt. Express

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We present a computational study of terahertz optical properties of a grating-coupled plasmonic structure based on micrometer-thin InSb layers. We find two strong absorption resonances that we interpret as standing surface plasmon modes and investigate their dispersion relations, dependence on InSb thickness, and the spatial distribution of the electric field. The observed surface plasmon modes are well described by a simple theory of the air/InSb/air trilayer. The plasmonic response of the grating/InSb structure is highly sensitive to the dielectric environment and the presence of an analyte (e.g., lactose) at the InSb interface, which is promising for terahertz plasmonic sensor applications. We determine the sensor sensitivity to be 7200 nm per refractive index unit (or 0.06 THz per refractive index unit). The lower surface plasmon mode also exhibits a splitting when tuned in resonance with the vibrational mode of lactose at 1.37 THz. We propose that such interaction between surface plasmon and vibrational modes can be used as the basis for a new sensing modality that allows the detection of terahertz vibrational fingerprints of an analyte.

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Section: Introductionmentioning

confidence: 99%

Thin InSb layers with metallic gratings: a novel platform for spectrally-selective THz plasmonic sensing

Lin¹,

Bhattarai²,

Zhou³

et al. 2016

Opt. Express

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show abstract

“…Upon excitation, the signals collecting the fields over time in monitors were then Fourier transformed. The dispersion relations were illustrated by the resonance peaks in the spectral map[38].…”

mentioning

confidence: 99%

Plasmonic slow light waveguide with hyperbolic metamaterials claddings

Liang

Jiang

Yang

et al. 2018

J. Opt.

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Plasmonic waveguides with an insulator core sandwiched between hyperbolic metamaterials (HMMs) claddings, i.e. HIH waveguide, are investigated for achieving wide slow-light band with adjustable working wavelength. The transfer matrix method and the finite-difference-time-domain simulation are employed to study waveguide dispersion characteristics and pulse propagation. By selecting proper silver filling ratios for HMMs, the hetero-HIH waveguide presents a slow-light band with a zero group velocity dispersion wavelength of 1.55 μm and is capable of buffering pulses with pulse width as short as ∼20 fs. This type of waveguides might be applicable for ultrafast slow-light application.

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Numerical study of near-, mid-, and long-infrared photon trapping in crystalline and amorphous HgCdTe metamaterials

2016

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Surface plasmon sorting and engineered dispersion curves using multilayer doped semiconductors

Cited by 3 publications

References 28 publications

Thin InSb layers with metallic gratings: a novel platform for spectrally-selective THz plasmonic sensing

Thin InSb layers with metallic gratings: a novel platform for spectrally-selective THz plasmonic sensing

Plasmonic slow light waveguide with hyperbolic metamaterials claddings

Numerical study of near-, mid-, and long-infrared photon trapping in crystalline and amorphous HgCdTe metamaterials

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