Design of a wavelength independent grating in the resonance domain

Hoshino, Tetsuya; Banerjee, Saswatee; Itoh, Masahide; Yatagai, Toyohiko

doi:10.1364/ao.46.007942

Cited by 11 publications

(12 citation statements)

References 52 publications

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“…The main differences between the results for Λ/λ of 9.1 and 22.7 are as follows: (1) different peak positions of the angular distribution, (2) broadening of angular distribution by the single-slit effect for Λ/λ of 9.1, and (3) reduction in the total reflectivity for Λ/λ of 22.7 [6].…”

Section: Discussionmentioning

confidence: 85%

“…The NS-FDTD program was run under MathCAD T M 2004 (MathSoft Engineering and Education, Inc., Cambridge, USA) [23][24][25]. The detailed calculation conditions are described in a previous paper [6]. The calculated grating is shown in Fig.…”

Section: Simulation Methodsmentioning

confidence: 99%

“…We have previously calculated the total reflectivity of the triangular periodic grating of surface relief [5,6]. Here, the total reflectivity is the sum of all the diffraction efficiencies of reflection.…”

Section: Fitting Of the Envelope Pattern Of Diffraction Patternmentioning

confidence: 99%

“…In this study, we used gratings in the resonance domain having periods ranging from one to several tens of wavelengths. Triangular gratings are promising for applications requiring antireflection, polarization selection and spreading, which are best explained in terms of diffractive optics rather than ray optics [4][5][6]. However, the diffractive optics of the grating are difficult to understand intuitively.…”

Section: Introductionmentioning

confidence: 99%

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Diffraction pattern of triangular grating in the resonance domain

et al. 2009

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We propose a combination of ray optics and Fraunhofer multiple-slit diffraction theory for calculating the two-dimensional triangular periodic grating in the resonance domain. The peak of the envelope pattern of angular distribution of diffraction efficiency is calculated by ray optics while the peak width is calculated using Fraunhofer theory. It was clarified, using rigorous coupled-wave analysis and a nonstandard-finite-difference time-domain method, that the envelope pattern of the diffraction of the grating could be calculated easily and understood intuitively for the design of displays and lighting.

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Section: Discussionmentioning

confidence: 85%

Section: Simulation Methodsmentioning

confidence: 99%

Section: Fitting Of the Envelope Pattern Of Diffraction Patternmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diffraction pattern of triangular grating in the resonance domain

et al. 2009

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“…The sample used was an infinite triangular grating fabricated on a 2-mm-thick transparent acrylic plate. After UV curing the grating was removed from a metallic mold [24]. The grating had periods of 3 and 5 µm and v/w = 1 and d/w = 0.48.…”

Section: Experimental Diffraction Intensity For An Infinite Gratingmentioning

confidence: 99%

Precise and rapid distance measurements by scatterometry

2012

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We found that the distances between isolated scatterers with similar columnar shapes could be measured by taking a single Fourier transform of their diffraction intensity. If the scatterers have different shapes, the distances between similar shapes can be selected from the distances between all the shapes. The distance from a specific scatterer can be measured with a resolution of 0.8 wavelengths and a precision of 0.01 wavelengths. This technique has the potential to be used in a novel optical memory that has a memory density as high as that of holographic memory, while can be fabricated by simple transfer molding. We used rigorous coupled-wave analysis to calculate the diffraction intensity. Some of the results were verified by nonstandard finite-difference time-domain simulations and experiments.

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Shape analysis of wavelength-insensitive grating in the resonance domain

Hoshino

Banerjee

Cole

et al. 2011

Optics Communications

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A triangular grating was compared with a rectangular one to investigate the effect of the shape, polarization and wavelength on the transmissivity and the diffraction angle distribution. The rigorous coupled-wave analysis (RCWA) and the nonstandard finite-difference time-domain (NS-FDTD) algorithm were used for the calculation. We found that the triangular grating in TE mode had the least wavelength dependence in the resonance domain, and this was explained by two independent parameters-(depth/wavelength) and (diffraction order × wavelength / period), whose ratio of the contribution to the diffraction efficiency equation was dependent on grating shape and polarization.

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Design of a wavelength independent grating in the resonance domain

Cited by 11 publications

References 52 publications

Diffraction pattern of triangular grating in the resonance domain

Diffraction pattern of triangular grating in the resonance domain

Precise and rapid distance measurements by scatterometry

Shape analysis of wavelength-insensitive grating in the resonance domain

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