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Magnetic-free Nitride Optical Isolator on Chip

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Tobias Kippenberg, Rui Ning Wang, Anat Siddharth, Junqiu Liu, Jijun He
2021

Abstract

We demonstrated a magnetic-free optical isolator for Si3N4 photonics using AlN piezoelectric actuators. Maximum of 10 dB isolation and

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https://infoscience.epfl.ch/entities/publication/5e551113-d77c-4a57-b0cf-c3c563e4f4a7

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Related concepts (9)

A metal (from Ancient Greek μέταλλον métallon 'mine, quarry, metal') is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets). These properties are the result of the metallic bond between the atoms or molecules of the metal. A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride.

A nanoparticle or ultrafine particle is usually defined as a particle of matter that is between 1 and 100 nanometres (nm) in diameter. The term is sometimes used for larger particles, up to 500 nm, or fibers and tubes that are less than 100 nm in only two directions. At the lowest range, metal particles smaller than 1 nm are usually called atom clusters instead.

Aluminium (aluminum in North American English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals; about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air. Aluminium visually resembles silver, both in its color and in its great ability to reflect light. It is soft, nonmagnetic and ductile.

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Integrated Magnetic-free Nitride Optical Isolator

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We demonstrated an integrated magnetic-free optical isolator for Si3N4 photonics using AlN piezoelectric actuators via spatio-temporal modulation. By entering into the strong mode coupling regime, maximum of 9dB isolation and

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