Active sorting of orbital angular momentum states of light with a cascaded tunable resonator.

Autor:	Wei S; 1Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen, 518060 China.; 2Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria, 3086 Australia.; 3School of Engineering, RMIT University, Melbourne, Victoria, 3001 Australia., Earl SK; 2Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria, 3086 Australia.; 3School of Engineering, RMIT University, Melbourne, Victoria, 3001 Australia., Lin J; 1Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen, 518060 China.; 3School of Engineering, RMIT University, Melbourne, Victoria, 3001 Australia.; 4School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria, 3010 Australia., Kou SS; 2Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria, 3086 Australia., Yuan XC; 1Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen, 518060 China.
Jazyk:	angličtina
Zdroj:	Light, science & applications [Light Sci Appl] 2020 Jan 28; Vol. 9, pp. 10. Date of Electronic Publication: 2020 Jan 28 (Print Publication: 2020).
DOI:	10.1038/s41377-020-0243-x
Abstrakt:	The orbital angular momentum (OAM) of light has been shown to be useful in diverse fields ranging from astronomy and optical trapping to optical communications and data storage. However, one of the primary impediments preventing such applications from widespread adoption is the lack of a straightforward and dynamic method to sort incident OAM states without altering the states. Here, we report a technique that can dynamically filter individual OAM states and preserve the incident OAM states for subsequent processing. Although the working principle of this technique is based on resonance, the device operation is not limited to a particular wavelength. OAM states with different wavelengths can resonate in the resonator without any additional modulation other than changing the length of the cavity. Consequently, we are able to demonstrate a reconfigurable OAM sorter that is constructed by cascading such optical resonators. This approach does not require specially designed components and is readily amenable to integration into potential applications. Competing Interests: Conflict of interestThe authors declare that they have no conflict of interest. (© The Author(s) 2020.)
Databáze:	MEDLINE
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