Open AccessDesign and fabrication of birefringent nano-grating structure for circularly polarized light emission
Author(s) -
Yaqun Liu,
Tsung-Han Tsai,
Yu Ling Kang,
YuCheng Chen,
YiHsiang Huang,
YiJiun Chen,
Xiang Fang,
Hoang Yan Lin,
WingKit Choi,
Lon A. Wang,
ChungChih Wu,
SiChen Lee
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.007388
Subject(s) - optics , grating , materials science , circular polarization , polarization (electrochemistry) , rigorous coupled wave analysis , birefringence , wavelength , interference lithography , diffraction grating , linear polarization , optoelectronics , lithography , ray , laser , fabrication , physics , medicine , chemistry , alternative medicine , pathology , microstrip
Three different nano-grating structures are designed as phase retarders that can transform linearly polarized light to circularly polarized emission for the wavelengths of 488 nm, 532 nm and 632.8 nm, respectively. Gold based nano-grating structures with various periods are fabricated by utilizing laser interference lithography. The ellipticity of all circularly polarized emission can reach around 90% such that the structure has great potential in the applications of three-dimensional (3D) display. The effects of the slit width and metal thickness modulations are simulated by rigorous coupled wave analysis (RCWA) method. Besides, the field intensity and phase of the transmitted TM and TE waves are also simulated to understand their polarization characteristics.