期刊
OPTICS LETTERS
卷 41, 期 12, 页码 2787-2790出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.41.002787
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资金
- National Basic Research Program of China [2013CBA01702]
- National Natural Science Foundation of China (NSFC) [11474206, 91233202, 11374216, 11404224]
- Program for New Century Excellent Talents in University (NCET) [NCET-12-0607]
- Scientific Research Project of Beijing Education Commission [KM201310028005]
- Beijing Youth Top-notch Talent Training Plan [CITTCD201504080]
An abruptly autofocusing ring-Airy beam is demonstrated in the terahertz (THz) waveband with a meta-hologram. The designed meta-hologram is composed of gold C-shaped slot antennas, which can realize both phase and amplitude modulation of the incident THz wave. A THz holographic imaging system is utilized to measure the generated ring-Airy beam; an abrupt focus following a parabolic trajectory is subsequently observed. THz ring-Airy beams with different parameters are also generated and investigated. This method can be expanded to other wavebands, such as the visible band, for which the meta-hologram can replace traditional computer-generated holography to avoid undesirable multiple diffraction orders. (C) 2016 Optical Society of America
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