Midinfrared Index Sensing of pL-Scale Analytes Based on Surface Phonon Polaritons in Silicon Carbide

Neuner, Burton; Korobkin, Dmitriy; Fietz, Chris; Carole, Davy; Ferro, Gabriel; Shvets, Gennady

doi:10.1021/jp9114139

Cited by 47 publications

(50 citation statements)

References 14 publications

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“…Mode (i) appears clearly in the GaN Reststrahlen band. Mode (ii) is as a red-shifted SiC SPhP, the magnitude of redshifting increasing with increasing GaN layer thickness (not shown), which can be interpreted as index-shifting of the SiC SPhP by the GaN layer 35 . Mode (iii) surprisingly emerges at the upper edge of the SiC high-reflectivity band at ∼ 1000 cm −1 , i.e., outside the spectral region supporting SPhPs, and likely corresponds to a waveguiding mode at small positive ε SiC and large ε GaN at this frequency.…”

Section: B Gan / 6h-sicmentioning

confidence: 99%

“…In addition to reflection and transmission coefficients, we also calculate the full electric field distributions throughout the heterostructure, which is particularly useful for analysis of polariton modes and their associated local field enhancements. To demonstrate the capabilities of our algorithm, we present simulation results for several model systems where SPhPs can be excited using prism coupling in the Otto geometry 20 : 6H-SiC, GaN/SiC, SiC/GaN/SiC, and α-quartz, covering a number of phenomena such as critical coupling to SPhPs 21,22 , index-sensing 35 , modesplitting 36 , wave-guiding 37 , and polaritons in hyperbolic media 29,32 .…”

Section: Introductionmentioning

confidence: 99%

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Generalized 4 × 4 matrix formalism for light propagation in anisotropic stratified media: study of surface phonon polaritons in polar dielectric heterostructures

2017

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We present a generalized 4×4 matrix formalism for the description of light propagation in birefringent stratified media. In contrast to previous work, our algorithm is capable of treating arbitrarily anisotropic or isotropic, absorbing or non-absorbing materials and is free of discontinous solutions. We calculate the reflection and transmission coefficients and derive equations for the electric field distribution for any number of layers. The algorithm is easily comprehensible and can be straight forwardly implemented in a computer program. To demonstrate the capabilities of the approach, we calculate the reflectivities, electric field distributions, and dispersion curves for surface phonon polaritons excited in the Otto geometry for selected model systems, where we observe several distinct phenomena ranging from critical coupling to mode splitting, and surface phonon polaritons in hyperbolic media.

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Section: B Gan / 6h-sicmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Generalized 4 × 4 matrix formalism for light propagation in anisotropic stratified media: study of surface phonon polaritons in polar dielectric heterostructures

2017

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“…Promising results by Anderson [125] support this claim. Further, an IR analog of surface plasmon resonance (SPR) biosensing was recently demonstrated by Neuner et al [174] whereby changes in the local index of refraction on a SiC surface were detected by attenuated total reflection (ATR), and they enable detection of pL quantities of analytes ( Figure 12A). In addition, the coincidence of the Reststrahlen band of hBN, c-BN, SiC, SiO 2 , Al 2 O 3 and many III-N materials with the vibrational modes of a wide array of molecular species and with an atmospheric transmission window leads to the potential for a wide array of applications.…”

Section: Realizing Mid-ir To Thz Nanophotonics and Metamaterials: Brimentioning

confidence: 99%

Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons

et al. 2015

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Abstract:The excitation of surface-phonon-polariton (SPhP) modes in polar dielectric crystals and the associated new developments in the field of SPhPs are reviewed. The emphasis of this work is on providing an understanding of the general phenomenon, including the origin of the Reststrahlen band, the role that optical phonons in polar dielectric lattices play in supporting sub-diffraction-limited modes and how the relatively long optical phonon lifetimes can lead to the low optical losses observed within these materials. Based on this overview, the achievements attained to date and the potential technological advantages of these materials are discussed for localized modes in nanostructures, propagating modes on surfaces and in waveguides and novel metamaterial designs, with the goal of realizing low-loss nanophotonics and metamaterials in the mid-infrared to terahertz spectral ranges.

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“…To discuss the implications for index-based sensing, 45 Whilst this simulation suggests that hBN can act as a surface sensor, it is instructive to benchmark against other index-based sensing schemes. In the Supporting Information (Figures S8 and S9) we compare a hBN film against a notional isotropic SPhP material operating with the same TO, LO and damping frequencies.…”

mentioning

confidence: 99%