Retrieving two-dimensional information of the subwavelength variation from far-field irradiance.
An eigenvalue-problem approach of blind deconvolution is developed to retrieve the information of two-dimensional subwavelength variation from far-field irradiance with an embedded-aperture configuration with three detectors. A reference signal has been implemented to determine the scaling issue, and hence it allows the exact order of magnitude of the retrieved signals to be estimated correctly. It is shown that the subwavelength variations of a two-dimensional aperture can be identified with a precision of better than a 1% error ratio.
Chu
Shu-Chun
SC
Department of Photonics, Institute of Electro-Optical Enginering, Display Institute, Microelectronics and Information System Research Center, National Chiao Tung University, Hsinchu, Taiwan. scchu.eo92g@nctu.edu.tw
Chern
Jyh-Long
JL