Open AccessTailor-made unitary operations using dielectric metasurfaces
Author(s) -
Ming Kang,
Kai Ming Lau,
Tsz Kit Yung,
Shengwang Du,
Wing Yim Tam,
Jensen Li
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.411467
Subject(s) - qubit , unitary transformation , unitary state , computer science , dielectric , transformation (genetics) , photon , optics , quantum computer , physics , quantum , transformation optics , metamaterial , optoelectronics , quantum mechanics , biochemistry , chemistry , political science , law , gene
Qubit operation belonging to unitary transformation is the fundamental operation to realize quantum computing and information processing. Here, we show that the complex and flexible light-matter interaction between dielectric metasurfaces and incident light can be used to perform arbitrary U(2) operations. By incorporating both coherent spatial-mode operation together with two polarizations on a single metasurface, we further extend the discussion to single-photon two-qubit U(4) operations. We believe the efficient usage of metasurfaces as a potential compact platform can simplify optical qubit operation from bulky systems into conceptually subwavelength elements.