Measuring orbital angular momentum of acoustic vortices based on Fraunhofer's diffraction?

• 作者: Chao-Fan Gong Hong-Ping Zhou Jing-Jing Li Kai Guo Zhong-Yi Guo
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS
• 页码范围: 395-401
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab9c11

摘要

Acoustic vortex (AV) beam is triggering the significant research interest in information and communication sciences due to its infinite and mutual orthogonal orbital angular momentums (OAMs). Therefore, measuring the topological charges of an AV beams become a task with great significance. In this work, we present a Fraunhofer diffraction (FD) pattern of an AV beam that can be used to quantitatively detect the OAMs of AV beams. We both theoretically and numerically investigate the FD patterns of AV beams passing through a multipoint interferometer (MPI). It is demonstrated that the topological charges of the AV beams can be determined from the interference intensity patterns. The proposed method may pave the way to the practical applications of AV beams.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Chao-Fan Gong		1	0	0.0	0.0
2	Jing-Jing Li		1	0	0.0	0.0
3	Kai Guo		1	0	0.0	0.0
4	Hong-Ping Zhou		1	0	0.0	0.0
5	Zhong-Yi Guo		1	0	0.0	0.0