Journal
OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS
Volume 17, Issue 5-6, Pages 191-197Publisher
NATL INST OPTOELECTRONICS
Keywords
Sandwiched two-layer arrays; Cancellation of zeroth order; Simulated annealing
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In this paper, a sandwich structure two-port transmission beam splitter with two-layer array is proposed. The structure and parameters of the grating are analyzed and optimized using rigorous coupled-wave analysis and simulated annealing algorithm to achieve high efficiency diffraction and zero order suppression. The diffraction efficiency of the grating at +/- 1st transverse magnetic polarization and transverse polarization is 48.83% and 49.12% respectively at normal incidence of 800 nm light. The grating can still maintain high efficiency within the process tolerance range of some parameters (including incident wavelength, duty cycle, incident angle and grating period).
In this paper, a sandwich structure two-port transmission beam splitter with two-layer array is proposed. By using rigorous coupled-wave analysis and simulated annealing algorithm, the structure and parameters of the grating are analyzed and optimized to achieve high efficiency diffraction and zero order suppression. At normal incidence of 800 nm incident light, the diffraction efficiency of the grating at +/- 1st transverse magnetic polarization and transverse polarization is 48.83% and 49.12% respectively. In addition, the grating can still maintain high efficiency within the process tolerance range of some parameters (including incident wavelength, duty cycle, incident angle and grating period).
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