Period interaction on diffraction efficiency of blazed transmission gratings

Wang, Huai-Jun; Kuang, Dengfeng; Sun, Xiaodong; Fang, Zhiliang

doi:10.1016/j.ijleo.2009.01.034

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…In contrast, the lower efficiencies were measured for diffraction gratings with large periods (3 and 5 μm) as shown in Fig. 4b and c [22, 23]. Comparing the efficiencies of the 3 and 5 μm gratings (Fig.…”

Section: Resultsmentioning

confidence: 97%

Fast and efficient manufacturing method of one‐ and two‐dimensional polyethylene terephthalate transmission diffraction gratings by direct laser interference patterning

Perez-Hernandez¹,

Lasagni²

2012

Polymer Engineering & Sci

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One‐ and two‐dimensional diffraction gratings were fabricated on commercial polyethylene terephthalate (PET) film by two beam direct laser interference patterning (DLIP) method using a pulse laser (10 ns) with a wavelength of 266 nm. The relative diffraction efficiency of the structured specimens (at 633 nm) in transmission mode was measured and correlated with the topological characteristics of the structured PET substrates. The obtained diffraction gratings made by DLIP show better or similar diffraction efficiencies when compared with the reported efficiency of gratings made by other methods (up to 42.5% for 1 μm arrays), and can be fabricated on large areas in very short processing times (up to 18 cm2/s). POLYM. ENG. SCI., 52:1903–1908, 2012. © 2012 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 97%

Fast and efficient manufacturing method of one‐ and two‐dimensional polyethylene terephthalate transmission diffraction gratings by direct laser interference patterning

Perez-Hernandez¹,

Lasagni²

2012

Polymer Engineering & Sci

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“…Several techniques have been investigated to calculate the diffraction efficiency. Wang et al [8] analyzed the interaction period on diffraction of the blazed transmission gratings with a modified extended scalar theory. The lights reflect from the neighboring structures can be refracted by the grating facets and form two extra fields on the bottom facet of blazed transmission gratings.…”

Section: Introductionmentioning

confidence: 99%

Bragg Grating Diffraction light at Different Wavelength and Incident Light

2019

IJITEE

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The diffraction grating is an important device that makes use of the diffraction of light to produce spectra. Diffraction is also fundamental in other applications such as x-ray diffraction studies of crystals and holography. We proposed a design of Bragg grating waveguide to investigate the behavior of diffraction of light at different incident angle and wavelengths. Using finite difference time domain (FDTD) photonics simulation software the performance of proposed waveguide is observed in term of output power, electric field, diffraction efficiency (DE) and signal to noise ratio (SNR). It is found that the proposed waveguide provides better diffracted light with electric field distribution with 1.969 v/m, Diffraction efficiency 8%, and SNR (25.5 dB) at 1.55µm wavelength and 00 degrees of incident angle

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“…[1][2][3][4][5] Alternatively, these optical structures can be made from plastics or glass and placed on the top of the PV panels. There are two main ways to boost the efficiency of solar cells-enhancing the photovoltaic (PV) effect and enhancing the optical performance by delivering more light energy onto the PV material.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of photovoltaic cell performance using periodic triangular gratings

2014

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The solar energy industry strives to produce more efficient and yet cost effective solar panels each consisting of an array of photovoltaic (PV) cells. The goal of this study was to enhance the performance of PV cells through increasing the cells' optical efficiency defined as a percentage of surface incident light that reaches the PV material. This was achieved through the reduction of waveguide decoupling loss and Fresnel reflection losses by integrating specific nonimaging micro-optical structures on the top surface of existing PV cells. Due to this integration, optical efficiency and performance were increased through the enhancement of light trapping, light guiding, and in-coupling functionalities. Periodic triangular gratings (PTGs) were designed, nonsequentially modeled, optimized, and fabricated in polydimethylsiloxane as proposed micro-optical structures. Then the performance of PV cells with and without integrated PTGs was evaluated and compared. Initial optical simulation results show that an original PV cell (without PTG) exhibits an average optical efficiency of 32.7% over a range of incident light angles between 15 and 90 deg. Integration of the PTG allows the capture of incoming sunlight by total internal reflection (TIR), whence it is reflected back onto the PV cell for multiple consecutive chances for absorption and PV conversion. Geometry of the PTG was optimized with respect to an angle of light incidence of {15, 30, 45, 60, 75, 90} deg. Optical efficiency of the geometrically optimized PTGs was then analyzed under the same set of incident light angles and a maximum optical efficiency of 54.1% was observed for a PV cell with integrated PTG optimized at 90 deg. This is a 53.3% relative improvement in optical performance when compared to an original PV cell. Functional PTG prototypes were then fabricated with optical surface quality (below 10 nm R a ) and integrated with PV cells demonstrating an increase in maximum power by 1.08 mW∕cm 2 (7.6% improvement in PV performance) and in short circuit current by 2.39 mA∕cm 2 (6.4% improvement).

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Period interaction on diffraction efficiency of blazed transmission gratings

Cited by 5 publications

References 9 publications

Fast and efficient manufacturing method of one‐ and two‐dimensional polyethylene terephthalate transmission diffraction gratings by direct laser interference patterning

Fast and efficient manufacturing method of one‐ and two‐dimensional polyethylene terephthalate transmission diffraction gratings by direct laser interference patterning

Bragg Grating Diffraction light at Different Wavelength and Incident Light

Enhancement of photovoltaic cell performance using periodic triangular gratings

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