期刊
OPTICS LETTERS
卷 43, 期 6, 页码 1263-1266出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.43.001263
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资金
- National Natural Science Foundation of China (NSFC) [61490715, U1701661, 11774437, 61323001, 11690031]
- National Basic Research Program of China (973 Program) [2014CB340000]
- National Key Research and Development Program of China [2016YFB0402503]
- Science and Technology Program of Guangzhou [201707020017, 2018-1002-SF-0094]
- Fundamental Research Funds for the Central Universities of China [SYSU: 17lgzd06]
- European Union Horizon 2020 project (ROAM)
Cylindrical vector vortex (CVV) beams, complex light fields that exhibit a vector nature and carry quantized orbital angular momentum (OAM) states, have been widely investigated due to their rich applications. Current technologies to generate CVV beams using individual polarization and spatial phase manipulations suffer from bulky size and low configurability. In this Letter, we propose and experimentally demonstrate an approach to generate CVV beams with a single integrated device based on a silicon nitride microring resonator and embedded top-gratings. The device allows the manipulation of both the polarization and OAM degrees of freedom of light, and enables the generation of both radially and azimuthally polarized CVV beams. In addition, we develop a method to fabricate the devices of shallow-etched top-gratings with only one-step etching. To the best of our knowledge, this novel method provides new capabilities to develop on-chip integrated devices with great ease and flexibility. (C) 2018 Optical Society of America
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