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Inverse-designed all-dielectric optical diode
Author(s): F. Callewaert; K. Aydin
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Paper Abstract

The objective-first inverse-design algorithm is used to design an ultra-compact all-dielectric optical diode. Based on silicon and air only, this optical diode relies on asymmetric spatial mode conversion between the left and right ports. The first even mode incident from the left port is transmitted to the right port after being converted into an odd mode. On the other hand, same mode incident from the right port is reflected back by the optical diode dielectric structure. The convergence and performance of the algorithm are studied, along with a transform method that converts continuous permittivity medium into a binary material design. The optimal device is studied with full electromagnetic simulations to compare its behavior under right and left incidences, in 2D and 3D settings as well. A broadband optical diode is reported with a large ratio between the two transmission directions. This illustrates the potential of the objective-first inverse-design method to design ultra-compact broadband photonic devices.

Paper Details

Date Published: 16 September 2016
PDF: 10 pages
Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 99182P (16 September 2016); doi: 10.1117/12.2237318
Show Author Affiliations
F. Callewaert, Northwestern Univ. (United States)
K. Aydin, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 9918:
Metamaterials, Metadevices, and Metasystems 2016
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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