The quest for all-optical signal processing is generally deemed to be impractical because
optical nonlinearities are usually weak. The emerging field of nonlinear photonic crystals …

Metamaterials possess exotic properties that do not exist in nature. Gradient metamaterials,
which are characterized by a continuous spatial variation of their properties, provide a …

Non-reciprocal devices such as isolators and circulators are key enabling technologies for
communication systems, both at microwave and optical frequencies. Although non …

We demonstrate that nanoparticle self-assembly can reach the same level of hierarchy,
complexity, and accuracy as biomolecules. The precise assembly structures of gold …

Optical systems combining balanced loss and gain provide a unique platform to implement
classical analogues of quantum systems described by non-Hermitian parity–time (PT) …

Compound-photonic structures with gain and loss provide a powerful platform for testing
various theoretical proposals on non-Hermitian parity–time-symmetric quantum mechanics …

Optical nonlinear functions are crucial for various applications in integrated photonics,
including all-optical information processing, photonic neural networks, and on-chip ultrafast …

Subwavelength dielectric resonators assembled into metasurfaces have become a versatile
tool for miniaturizing optical components approaching the nanoscale,–. An important class of …

This tutorial provides an intuitive and concrete description of the phenomena of
electromagnetic nonreciprocity that will be useful for readers with engineering or physics …

What is — and what is not — an optical isolator | Nature Photonics Skip to main content Thank
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