![]() A quasi-Bragg immersion (QBI) grating has smooth mirror hypotenuse and reflector array inside the hypotenuse, instead of step-like grooves of a conventional immersion grating. We fabricated QB grating by laminating of silica glass substrates and glued by pressure fusion of gold films. A quasi-Bragg (QB) grating, which consists long rectangle mirrors aligned in parallel precisely such as a window shade, also achieves high diffraction efficiency toward higher orders. We fabricated 3B grating with liquid crystal and evaluated the performance of the liquid crystal grating. The 3B grating achieves diffraction efficiency up to 100% for non-polarized light by tuning of refractive indices for S and P polarizations, even in higher diffraction orders. A birefringence binary Bragg (3B) grating is a thick transmission grating with optically anisotropic material such as lithium niobate or liquid crystal. Furthermore diffraction efficiency of the VPH grating extinguishes toward a higher diffraction order. However the VPH grating could not achieve high diffraction efficiency for non-polarized light at a large diffraction angle because properties of diffraction efficiencies for S and P polarizations are different. This theoretical analysis is illustrated with experimental results using a liquid crystal device to display diffraction gratings with different fill factors.īirefringence Bragg Binary (3B) grating, quasi-Bragg grating and immersion gratingsĮbizuka, Noboru Morita, Shin-ya Yamagata, Yutaka Sasaki, Minoru Bianco, Andorea Tanabe, Ayano Hashimoto, Nobuyuki Hirahara, Yasuhiro Aoki, WakoĪ volume phase holographic (VPH) grating achieves high angular dispersion and very high diffraction efficiency for the first diffraction order and for S or P polarization. The proposed phasor technique is mathematically equivalent to the Fourier transform calculation of the diffraction order amplitude, and it can be useful to explain binary diffraction gratings in a simple manner in introductory physics courses. By introducing a slit phasor and a grating phasor, the intensity of the diffracted orders and the grating's resolving power can be easily obtained without applying the usual Fourier transform operations required for these calculations. The analysis is based on a simple phasor technique directly derived from the Huygens principle. In this work, we present a simple analysis of binary diffraction gratings with different slit widths relative to the grating period. MartInez, Antonio [Departamento de Ciencia de Materiales, Optica y TecnologIa Electronica, Universidad Miguel Hernandez, 03202 Elche (Spain) Sanchez-Lopez, Ma del Mar [Instituto de BioingenierIa y Departamento de Fisica y Arquitectura de Computadores, Universidad Miguel Hernandez, 03202 Elche (Spain) Moreno, Ignacio [Departamento de Ciencia de Materiales, Optica y TecnologIa Electronica, Universidad Miguel Hernandez, 03202 Elche (Spain) This theoretical analysis is illustrated with experimental results using a liquid crystal device to display diffraction gratings with different fill factorsĮnergy Technology Data Exchange (ETDEWEB) ![]() ![]() ![]() MartInez, Antonio Sanchez-Lopez, Ma del Mar Moreno, Ignacio International Nuclear Information System (INIS) Phasor analysis of binary diffraction gratings with different fill factors ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |