Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices， School of Physics and Electronics，Hunan University， Changsha 410082， China
Supported by National Natural Science Foundation of China （61405058， 62075059）， Natural Science Foundation of Hunan Province （2017JJ2048， 2020JJ4161）
A scatterer-size gradient photonic crystal flat lens is proposed， which can simultaneously realize point source imaging and plane wave focusing in TM and TE polarization modes，and both imaging and focusing break through the diffraction limit in TM polarization mode，and realize sub-wavelength imaging and focusing in TE polarization mode. This flat lens can realize polarization-insensitive imaging and focusing without any additional polarization components. It is expected to be used in the design of multi-functional optical polarization-insensitive imaging and focusing devices， and can be applied to real-time biological display， high-density optical storage and microelectronic lithography， and improve the application potential of gradient PC flat lens.
CEN Yuan, XIE Jian-lan, LIU Jian-jun. A photonic crystal flat lens insensitive to polarization mode and light source[J]. Journal of Infrared and Millimeter Waves,2022,41(2):506~510Copy