Nonlinearity-based circulator

Commercially available nonreciprocal devices, such as isolators and circulators, play a fundamental role in communication systems. Since they commonly rely on magnetic materials, they tend to become bulky, expensive, and difficult to be integrated in conventional microelectronic circuits. Here, we explore the functionality of a magnetic-free circulator where reciprocity is broken by suitable geometric asymmetries combined with tailored nonlinearities. We show that it is possible to operate a fully passive coupled resonator system without external bias like a circulator for pulsed signals impinging at its ports within a desired range of intensities. The functionality can be applied to a variety of physical systems, ranging from electronics to photonics and acoustics.Commercially available nonreciprocal devices, such as isolators and circulators, play a fundamental role in communication systems. Since they commonly rely on magnetic materials, they tend to become bulky, expensive, and difficult to be integrated in conventional microelectronic circuits. Here, we explore the functionality of a magnetic-free circulator where reciprocity is broken by suitable geometric asymmetries combined with tailored nonlinearities. We show that it is possible to operate a fully passive coupled resonator system without external bias like a circulator for pulsed signals impinging at its ports within a desired range of intensities. The functionality can be applied to a variety of physical systems, ranging from electronics to photonics and acoustics.

[1]  M. Lipson,et al.  Subject Areas : Optics A Viewpoint on : Electrically Driven Nonreciprocity Induced by Interband Photonic Transition on a Silicon Chip , 2012 .

[2]  A. Alú,et al.  Non-reciprocal photonics based on time modulation , 2017 .

[3]  H. Haus,et al.  Coupled-mode theory , 1991, Proc. IEEE.

[4]  Martin M. Fejer,et al.  All-optical diode in a periodically poled lithium niobate waveguide , 2001 .

[5]  Zongfu Yu,et al.  Complete optical isolation created by indirect interband photonic transitions , 2009 .

[6]  Andrea Alù,et al.  Magnetic-free non-reciprocity and isolation based on parametrically modulated coupled-resonator loops , 2014, Nature Physics.

[7]  Zongfu Yu,et al.  Limitations of nonlinear optical isolators due to dynamic reciprocity , 2015, Nature Photonics.

[8]  H. B. G. Casimir,et al.  On Onsager's Principle of Microscopic Reversibility , 1945 .

[9]  Zongfu Yu,et al.  What is — and what is not — an optical isolator , 2013, Nature Photonics.

[10]  Andrea Alù,et al.  Broadband passive isolators based on coupled nonlinear resonances , 2018 .

[11]  R. J. Potton,et al.  Reciprocity in optics , 2004 .

[12]  Andrea Alù,et al.  Nonreciprocity Based on Nonlinear Resonances , 2018, IEEE Antennas and Wireless Propagation Letters.

[13]  Fabio Biancalana,et al.  All-optical diode action with quasiperiodic photonic crystals , 2008 .

[15]  Patrick LiKamWa,et al.  Integrated multi-port circulators for unidirectional optical information transport , 2017, Scientific Reports.

[16]  Michael Scalora,et al.  Thin-film nonlinear optical diode , 1995 .

[17]  Sergei V. Zhukovsky,et al.  All-optical diode action in asymmetric nonlinear photonic multilayers with perfect transmission resonances , 2011 .

[18]  Ashutosh Sabharwal,et al.  Experiment-Driven Characterization of Full-Duplex Wireless Systems , 2011, IEEE Transactions on Wireless Communications.