Integration of optical isolators remains one the main technological issues of photonic circuits despite several decades of research. We propose a radically new concept which enables performing broad-band isolation even in the case of low-gyrotropy material, opening the road to a new class of non-reciprocal devices using easy-to-integrate composite materials. The principle explores the separation of back-and-forth light paths, induced by the coupled mode asymmetry in magnetoplasmonic slot waveguides. We show numerically that such a structure combined with suitable absorbers gives more than a 18 dB isolation ratio on several tens of nanometers bandwidth, with 2 dB insertion losses.

Broad-band plasmonic isolator compatible with low-gyrotropy magneto-optical material / Abadian, Sevag; Magno, Giovanni; Yam, Vy; Dagens, Beatrice. - In: OPTICS EXPRESS. - ISSN 1094-4087. - ELETTRONICO. - 29:3(2021), pp. 4091-4104. [10.1364/OE.415969]

Broad-band plasmonic isolator compatible with low-gyrotropy magneto-optical material

Giovanni Magno;
2021-01-01

Abstract

Integration of optical isolators remains one the main technological issues of photonic circuits despite several decades of research. We propose a radically new concept which enables performing broad-band isolation even in the case of low-gyrotropy material, opening the road to a new class of non-reciprocal devices using easy-to-integrate composite materials. The principle explores the separation of back-and-forth light paths, induced by the coupled mode asymmetry in magnetoplasmonic slot waveguides. We show numerically that such a structure combined with suitable absorbers gives more than a 18 dB isolation ratio on several tens of nanometers bandwidth, with 2 dB insertion losses.
2021
Broad-band plasmonic isolator compatible with low-gyrotropy magneto-optical material / Abadian, Sevag; Magno, Giovanni; Yam, Vy; Dagens, Beatrice. - In: OPTICS EXPRESS. - ISSN 1094-4087. - ELETTRONICO. - 29:3(2021), pp. 4091-4104. [10.1364/OE.415969]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/221752
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