Oliff PLC
Ultrahigh-resolution photonic-crystal superprism and method for designing the same
A method for designing an ultrahigh-resolution photonic-crystal superprism, including the following steps: selecting a medium material, and determining a structure type and parameter of a photonic crystal, obtaining the photonic crystal's equifrequency graph, and looking for an auto-collimation area; obtaining the group velocity distribution of points in the equifrequency graph, and looking for a low group velocity area; optimizing the photonic crystal's structure parameter, facilitating the auto-collimation and the low group velocity area in the photonic crystal's equifrequency graph to be overlapped as much as possible, and defining overlapping area as a work area; obtaining an equal incidence-angle line, rotating the photonic crystal to intersect the equal incidence-angle line with the work area, and selecting the appropriate incidence angle in an intersection point to complete the design of the photonic-crystal superprism. When light makes incidence via the above incidence angle, the photonic crystal may separate light with different frequencies significantly.
SHANGHAI INSTITUTE OF MICROSYSTEM AND INFORMATION TECHNOLOGY, CHINESE ACADEMY OF SCIENCES FUDAN UNIVERSITY
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G02B G02B G02B G02B
inventional inventional inventional inventional
Wei Xulin Xunya Xiaogang
Li Lin Jiang Zhang