15 papers
Inverse design of photonic crystals through automatic differentiation
Momchil Minkov, Ian A. D. Williamson, Lucio C. Andreani +5
Gradient-based inverse design in photonics has already achieved remarkable results in designing small-footprint, high-performance optical devices. The adjoint variable method, whic…
Integrated Nonreciprocal Photonic Devices with Dynamic Modulation
Ian A. D. Williamson, Momchil Minkov, Avik Dutt +3
Nonreciprocal components, such as isolators and circulators, are crucial components for photonic systems. In this article we review theoretical and experimental progress towards de…
Higher-order topological insulators in synthetic dimensions
Avik Dutt, Momchil Minkov, Shanhui Fan
Conventional topological insulators support boundary states that have one dimension lower than the bulk system that hosts them, and these states are topologically protected due to…
-Symmetric Topological Edge-Gain Effect
Alex Y. Song, Xiao-Qi Sun, Avik Dutt +6
We demonstrate a non-Hermitian topological effect that is characterized by having complex eigenvalues only in the edge states of a topological material, despite the fact that the m…
Parallel fault-tolerant programming of an arbitrary feedforward photonic network
Sunil Pai, Ian A. D. Williamson, Tyler W. Hughes +4
Reconfigurable photonic mesh networks of tunable beamsplitter nodes can linearly transform -dimensional vectors representing input modal amplitudes of light for applications suc…
Forward-Mode Differentiation of Maxwell's Equations
Tyler W Hughes, Ian A D Williamson, Momchil Minkov +1
We present a previously unexplored forward-mode differentiation method for Maxwell's equations, with applications in the field of sensitivity analysis. This approach yields exact g…