Design of transmission blazed binary gratings for optical limiting with the form-birefringence theory.
The structure of transmission blazed binary gratings for optical limiting is designed with the form-birefringence theory. This kind of grating has subwavelength features, can imitate the transmission blazed grating effectively, and has higher efficiencies than a transmission blazed grating with a subwavelength structure. The diffraction efficiencies are calculated and analyzed. For the normal incident light with 10.6 microm wavelength, the transmissivities for the designed grating at 0 degrees deviation angle for TE and TM polarizations are 0.05% and 5.09%, respectively, which are basically identical to the results of the finite-difference time-domain method. The diffraction efficiencies of the first transmitted order for TE and TM polarizations are 93.95% and 83.88%, respectively.
Lu
Nan
N
Institute of Modern Optics, Key Laboratory of Opto-Electronic Information Science and Technology of the Education Ministry of China, Nankai University, Tianjin 300071, China.
Kuang
Dengfeng
D
Mu
Guoguang
G