Study on superprism effect in the multilayer optical thin film stack |
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Authors: | SUN Xue-zheng Gu Pei-Fu Chen Hai-Xing JIN Bo LI Hai-feng LIU Xu |
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Affiliation: | State Key Laboratory of Modern Optical Instrumentations,Zhejiang University,Hangzhou 310027,China |
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Abstract: | Researches show that multilayer optical thin film stack can exhibit superprism effect due to their large abnormal dispersions. We investigated and simulated this effect numerically in a 1-D non-periodic film structure-Fabry-Perot filters (FPF), which possess drastic change in phase and large group delay around wavelength of peak transmittance, and fabricated this device to realize remarkable superprism effect. We tested experimentally with the maximum spatial separation shift up to 65 μm, and the experimental result is in good agreement with the theory. Compared with the traditional prism, the total thickness of our structure is only 3.3 μm, and our prism shows a stronger angular resolution of 1.8°/nm. |
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Keywords: | multilayer optical thin film photonic crystal superprism effect Fabry-Perot filter group delay |
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