Faraday rotator

Department of Electrical Engineering, Shanhui Fan and Zongfu Yu are at Ginzton Laboratory, Stanford University, Stanford, California 94305, USA,

INTEC Department and Center for Nano- and Biophotonics, Roel Baets is at the Photonics Research Group, Ghent University-IMEC, B-9000 Gent, Belgium,

Poor man'sisolator

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Dirk Jalas, Alexander Petrov and Manfred Eich are at the Institute of Optical and Electronic Materials, Hamburg University of Technology, D-21073 Hamburg, Germany,

Opticalcirculator

The quest for on-chip optical isolators has recently spawned many new isolator structures. However, there has been some confusion about the requirement of nonreciprocity. Here, we review the essential characteristics of an isolator.

Jalas, D., Petrov, A., Eich, M. et al. What is — and what is not — an optical isolator. Nature Photon 7, 579–582 (2013). https://doi.org/10.1038/nphoton.2013.185

Integrated passive nonlinearopticalisolators

Hagen Renner is at the Institute of Optical Communication Technology, Hamburg University of Technology, D-21073 Hamburg, Germany,

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Thorlabsisolator

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Miloš Popović is at the Department of Electrical, Computer and Energy Engineering, University of Colorado, Boulder, Colorado 80302, USA,

What is -- and what is not -- anoptical isolator

John D. Joannopoulos is at the Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA,

Mathias Vanwolleghem is at Institut d'Electronique de Micro-electronique et de Nanotechnologie, CNRS, Université Lille 1, 59650 Villeneuve d'Ascq, France,

Christopher R. Doerr is at Acacia Communications Inc., Three Clock Tower Place, Suite 210, Maynard, Massachusetts 01754, USA,

Wolfgang Freude is at the Institute of Photonics and Quantum Electronics and Institute of Microstructure Technology, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany,

Andrea Melloni is at Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, 20133 Milano, Italy,