Reciprocity is a fundamental principle in optics, requiring that the response of a transmission
channel is symmetric when source and observation points are interchanged. It is of major …

Topological photonics is a rapidly emerging field of research in which geometrical and
topological ideas are exploited to design and control the behavior of light. Drawing …

Nonreciprocity, arising from the breaking of time-reversal symmetry, has become a
fundamental tool in diverse quantum technology applications. It enables directional flow of …

Non-reciprocal devices, such as circulators and isolators, are indispensable components in
classical and quantum information processing in integrated photonic circuits. Aside from …

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

We propose how to achieve nonreciprocal quantum entanglement of light and motion and
reveal its counterintuitive robustness against random losses. We find that by splitting the …

We discuss a general method for constructing nonreciprocal, cavity-based photonic devices,
based on matching a given coherent interaction with its corresponding dissipative …

Topological features—global properties not discernible locally—emerge in systems ranging
from liquid crystals to magnets to fractional quantum Hall systems. A deeper understanding …

Non-reciprocal components, which are essential to many modern communication systems,
are almost exclusively based on magneto-optical materials, severely limiting their …

Nonreciprocal components, such as isolators and circulators, provide highly desirable
functionalities for optical circuitry. This motivates the active investigation of mechanisms that …