Qunhao Zhang, Fan-Yi Meng, Jiahui Fu, Wan Chen, Kuang Zhang, Qun Wu, Shah Nawaz Burokur
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Phase-modulated Airy beam generation by a leaky-wave structure.
This work presents the generation of an Airy beam by a leaky-wave structure (LWS) designed from a substrate-integrated waveguide (SIW) with dimension-varying slots. The Airy beam is radiated by judiciously designing the length of the slots to modulate the phase distribution. Compared to Airy beams generated by phased array antennas or metasurfaces, no complex feeding network associated with phase shifters and no space-wave illumination is required, thus allowing one to reach a low-profile structure. The features of the generated Airy beam are verified by experimental measurements performed on the LWS operating in the microwave domain. The parabolic path as well as the self-accelerating mainlobe of the Airy beam is validated in a frequency band spanning from 7.5 GHz to 8 GHz. The proposed low-profile Airy beam generator can be readily applied to wireless near-field communications for applications related to wireless power transfer, radio frequency identification, and the Internet of Things.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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