Mode coupling and interaction in a plasmonic microcavity with resonant mirrors

Fu, Liwei; Schau, Philipp; Frenner, Karsten; Weiß, Thomas; Schweizer, H.; Gießen, Harald

doi:10.1103/physrevb.84.235402

Cited by 16 publications

(8 citation statements)

References 33 publications

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“…Figure I‐L show the magnetic field distribution of a solar cell containing dual NG structures, calculated under TM‐polarized illumination (see Figure I,J) and TE‐polarized illumination (see Figure K,L). The electromagnetic field distributions in the solar cell depend on the interaction between the SPR modes and photonic modes (in the active region) supported in the solar cell . Figure I‐L demonstrate the field interaction between the field diffracted from frontside GaN‐NGs and the field scattered from backside Ag‐NGs, at different incident wavelengths.…”

Section: Resultsmentioning

confidence: 99%

“…The effect of varying the geometrical parameters of the frontside and backside nanogratings—on the absorption and short‐circuit current density of the solar cells—was studied. Moreover, the effect of a relative lateral shift between both the NGs (the frontside and backside nanogratings) on the performance of the solar cell was also investigated. In this paper, we demonstrate the advantage of having different periodicities of the frontside and backside NGs.…”

Section: Introductionmentioning

confidence: 99%

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Indium‐rich InGaN/GaN solar cells with improved performance due to plasmonic and dielectric nanogratings

Kumawat

Kumar

Bhardwaj

et al. 2019

Energy Science & Engineering

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In this study, we propose an indium‐rich InGaN/GaN p‐i‐n thin‐film solar cell which incorporates a dual nanograting (NG) structure: Ag nanogratings (Ag‐NGs) on the backside of the solar cell and gallium nitride nanogratings (GaN‐NGs) on the frontside. Finite‐difference time‐domain (FDTD) simulation results show that the dual NG structure couples the incident sunlight to the plasmonic and photonic modes, thereby increasing the absorption of the solar cell in a broad spectral range. It is observed that the solar cells having the dual nanograting structures have a significant enhancement in light absorption as compared to cells having either no nanogratings or having only the frontside nanogratings or only the backside nanogratings. Analysis of light absorption in solar cells containing the dual NG structures showed that the absorption enhancement of longer wavelengths is mostly due to the Ag‐NGs on the backside and of shorter wavelengths is mostly due to the GaN‐NGs on frontside of the solar cell. The Jsc and power conversion efficiency (PCE) are calculated under AM1.5G solar illumination and are observed to be significantly enhanced due to the presence of optimized dual NG structures. While there is an increase in Jsc from 17.88 to 23.19 mA/cm2 (~30% enhancement), there is an increase in PCE from 15.49% to 20.24% (~31% enhancement) under unpolarized light (average of TM and TE). Moreover, the study of oblique light incidence shows significantly larger Jsc of the dual nanograting solar cells compared to the cells with no nanogratings.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Indium‐rich InGaN/GaN solar cells with improved performance due to plasmonic and dielectric nanogratings

Kumawat

Kumar

Bhardwaj

et al. 2019

Energy Science & Engineering

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“…Recently, strong coupling between plasmonic and photonic modes has been demonstrated in hybrid LSPR Fabry-Perot (FP) cavities making use of near-and far-field interaction. In these cavity-coupled systems, three distinct configurations were previously studied where the plasmonic element is placed inside [27,28], at the front end [29][30][31] and at both ends [32][33][34][35] of the cavity. In the first configuration, coupling is studied from a cavity-atom picture in quantum electrodynamics based on the coupled oscillator model.…”

mentioning

confidence: 99%

“…However, the model suffers from the limitation in estimating the coupling coefficient, which is kept as a fitting parameter [27,28]. In the second and third cases, coupling has been studied theoretically using the Fourier modal [29,32], scattering matrix [34][35][36], numerical finite-difference time domain (FDTD) method [30,32], and finite integration technique [33] as a function of cavity length. The presence of a cavity influences surface plasmon excitation constructively or destructively, resulting in strong LSPR enhancement or complete suppression [27,30,37] purely by far-field interaction.…”

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confidence: 99%

Hybrid Coupling Mechanism in a System Supporting High Order Diffraction, Plasmonic, and Cavity Resonances

et al. 2014

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The interactions between plasmonic and photonic modes of a cavity-coupled plasmonic crystal are studied in diffraction and diffractionless regimes, which lead us to the understanding of coherent interactions between electron plasma, higher order cavity, and diffraction modes. The strong interaction between plasmonic and photonic modes is shown to enhance as well as suppress surface plasmon resonance based on cavity phase relation. Numerical and analytical approaches are developed to accurately explain the physics of the interactions evident in their characteristic dispersion graphs. Further experimental measurements confirm the theoretical predictions.

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“…As known from the properties of resonantly coupled double meander layers [26], strong interactions occur between surface plasmons and Fabry-Pérot (FP) cavity modes and between the different surface plasmon modes at smaller cavity length. The system can be understood as an FPcavity with frequency selective mirrors (meander structures) with a cavity length of D spa [38]. Within cavity lengths where the two layers are weakly coupled (e.g.…”

Section: Double Meander Structuresmentioning

confidence: 99%

Polarization scramblers with plasmonic meander-type metamaterials

Schau¹,

Fu²,

Frenner³

et al. 2012

Opt. Express

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Due to plasmonic excitations, metallic meander structures exhibit an extraordinarily high transmission within a well-defined pass band. Within this frequency range, they behave like almost ideal linear polarizers, can induce large phase retardation between s-and p-polarized light and show a high polarization conversion efficiency. Due to these properties, meander structures can interact very effectively with polarized light. In this report, we suggest a novel polarization scrambler design using spatially distributed metallic meander structures with random angular orientations. The whole device has an optical response averaged over all pixel orientations within the incident beam diameter. We characterize the depolarizing properties of the suggested polarization scrambler with the Mueller matrix and investigate both single layer and stacked meander structures at different frequencies. The presented polarization scrambler can be flexibly designed to work at any wavelength in the visible range with a bandwidth of up to 100 THz. With our preliminary design, we achieve depolarization rates larger than 50% for arbitrarily polarized monochromatic and narrow-band light. Circularly polarized light could be depolarized by up to 95% at 600 THz.

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Mode coupling and interaction in a plasmonic microcavity with resonant mirrors

Cited by 16 publications

References 33 publications

Indium‐rich InGaN/GaN solar cells with improved performance due to plasmonic and dielectric nanogratings

Indium‐rich InGaN/GaN solar cells with improved performance due to plasmonic and dielectric nanogratings

Hybrid Coupling Mechanism in a System Supporting High Order Diffraction, Plasmonic, and Cavity Resonances

Polarization scramblers with plasmonic meander-type metamaterials

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