期刊
OPTICS EXPRESS
卷 21, 期 17, 页码 20230-20239出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.020230
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资金
- 973 Program of China [2013CBA01702]
- National Natural Science Foundation of China [91233202, 61205097, 11204188, 11174211]
- National High Technology Research and Development Program of China [2012AA101608-6]
- Beijing Natural Science Foundation [KZ201110028035, 1132011]
- Program for New Century Excellent Talents in University [NCET-12-0607]
Based on the complementary V-shaped antenna structure, ultrathin vortex phase plates are designed to achieve the terahertz (THz) optical vortices with different topological charges. Utilizing a THz holographic imaging system, the two dimensional complex field information of the generated THz vortex beam with the topological number l = 1 is directly obtained. Its far field propagation properties are analyzed in detail, including the rotation, the twist direction, and the Gouy phase shift of the vortex phase. An analytic Laguerre-Gaussian mode is used to simulate and explain the measured phenomena. The experimental and simulation results overlap each other very well. (C)2013 Optical Society of America
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