Journal: Scientific Reports

Article Title: Dual-guiding-layer resonance structure with an embedded metasurface for quasi-critical coupling without a perfect mirror

doi: 10.1038/s41598-020-72983-8

Figure Lengend Snippet: ( a ) DGL resonance absorbers on an SOI platform with an SLG on top of an oxide layer (Type A) and in-between the oxide layer (Type B). The incident light is transverse electric (TE) polarized (parallel to the grating bar). ( b ) Cross-sectional view of the DGL (Type A) with design parameters. Grating parameters: period (Λ), duty cycle (DC), grating bar width = (DC·Λ), grating thickness ( t g ), and thicknesses of three homogeneous layers: slab ( t s ), cap ( t c ), and oxide thickness ( t o ). ( c ) Schematic illustration of the physical mechanism of DGL resonance (red arrows: diffraction process; blue arrows: TIR). θ c,top : a critical angle for the top interface, θ c,bot : a critical angle for the bottom interface (graphene layer not included here). ( d ) Representative electric field amplitude: dotted lines correspond to different layers while red ones to the metasurface. The image is created by MathWorks MATLAB 2019b with in-house RCWA method.

Article Snippet: The image is created by MathWorks MATLAB 2019b with in-house RCWA method.

Techniques:

Journal: Scientific Reports

Article Title: Dual-guiding-layer resonance structure with an embedded metasurface for quasi-critical coupling without a perfect mirror

doi: 10.1038/s41598-020-72983-8

Figure Lengend Snippet: ( a ) Reflectance and transmittance spectra of the DGL resonance structure without SLG and ( d ) its electric field distribution; ( b ) reflectance, transmittance, and absorption spectra with SLG and ( e ) its electric field distribution; ( c ) phase spectrum of the reflection coefficient. Dotted lines in ( d ) and ( e ) indicate different layers of the DGL structure shown in Fig. (black-dotted line: SLG). ( d ) and ( e ) are created by MathWorks MATLAB 2019b with in-house RCWA method.

Article Snippet: The image is created by MathWorks MATLAB 2019b with in-house RCWA method.

Techniques:

Journal: Scientific Reports

Article Title: Dual-guiding-layer resonance structure with an embedded metasurface for quasi-critical coupling without a perfect mirror

doi: 10.1038/s41598-020-72983-8

Figure Lengend Snippet: Absorption contour plots as a function of two grating parameters: ( a ) grating thickness versus duty cycle, ( b ) duty cycle versus wavelength. Absorption contour plots as a function of thickness of two homogeneous layers above the grating and wavelength: ( c ) oxide layer thickness versus wavelength and ( d ) cap layer thickness versus wavelength. The images are created by MathWorks MATLAB 2019b with in-house RCWA method.

Article Snippet: The image is created by MathWorks MATLAB 2019b with in-house RCWA method.

Techniques:

Journal: Scientific Reports

Article Title: Dual-guiding-layer resonance structure with an embedded metasurface for quasi-critical coupling without a perfect mirror

doi: 10.1038/s41598-020-72983-8

Figure Lengend Snippet: ( a ) Absorption spectra as a function of wavelength and incidence angle for Type A DGL structure. ( b ) Corresponding electric field (|E y |) profiles at the three points (dotted lines indicate different layers; black line indicates graphene position). ( c ) Absorption and phase (∠r) spectra, aligned with each peak wavelength. ( a ) and ( b ) are created by MathWorks MATLAB 2019b with in-house RCWA method.

Article Snippet: The image is created by MathWorks MATLAB 2019b with in-house RCWA method.

Techniques:

Journal: Scientific Reports

Article Title: Dual-guiding-layer resonance structure with an embedded metasurface for quasi-critical coupling without a perfect mirror

doi: 10.1038/s41598-020-72983-8

Figure Lengend Snippet: DGL graphene absorber with fixed 120 nm-thick grating for different peak wavelengths. ( a ) Absorption spectra of DGL graphene absorber designed for different peak absorption wavelengths. ( b ) Relative phase spectra of each DGL absorber. ( c ) Electric field amplitude distribution at respective peak wavelengths of 1520, 1550, and 1580 nm. The image is created by MathWorks MATLAB 2019b with in-house RCWA method.

Article Snippet: The image is created by MathWorks MATLAB 2019b with in-house RCWA method.

Techniques: