145 citations · 1.3k across the 50 of their papers we have counts for
51 papers
Non-Hermitian Mode Cleaning in Periodically Modulated Multimode Fibers
M. N. Akhter, S. B. Ivars, M. Botey +2
We show that the simultaneous modulation of the propagation constant and of the gain/loss coefficient along the multimode fibers results in unidirectional coupling among the modes,…
Extremely Narrow, Sharp-Peaked Resonances at the Edge of the Continuum
Ignas Lukosiunas, Lina Grineviciute, Julianija Nikitina +2
We report a critical narrowing of resonances of a driven potential well, when their eigenfrequencies approach the edge of the continuum. The resonances also obtain unusual sharp-pe…
Machine learning for knowledge acquisition and accelerated inverse-design for non-Hermitian systems
W. W. Ahmed, M. Farhat, K. Staliunas +2
Non-Hermitian systems offer new platforms for unusual physical properties that can be flexibly manipulated by redistribution of the real and imaginary parts of refractive indices,…
Nanostructured Multilayer Coatings for Spatial Filtering
Lina Grineviciute, Ceren Babayigit, Darius Gailevičius +6
Spatial filtering is an important mechanism to improve the spatial quality of laser beams. Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used f…
Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
W. W. Ahmed, R. Herrero, M. Botey +2
We propose a general design strategy based on genetic optimization to realize asymmetric reflectivity in periodic and non-periodic planar structures containing dielectric and gain-…
Tilted black-Si: ~0.45 form-birefringence from sub-wavelength needles
Darius Gailevicius, Meguya Ryu, Reo Honda +14
The self-organised conical needles produced by plasma etching of silicon (Si), known as black silicon (b-Si), create a form-birefringent surface texture when etching of Si orientat…