194 citations · 540 across the 15 of their papers we have counts for
17 papers
Prior-information based super-resolution optical metrology of 2D nanoscale objects
Jin-Kyu So, Eng Aik Chan, Carolina Rendón-Barraza +2
Previous work has shown that optical metrology of one-dimensional objects, such as slit width, can achieve improved accuracy by using prior information from similar objects to trai…
Improving Optical Metrology by Engineering the Target Environment
Thomas A. Grant, Cheng-Hung Chi, Kevin F. MacDonald +1
Measurements of positional coordinates and dimensions - whether by human vision or optical instrumentation - are fundamental to safety, industrial productivity, manufacturing quali…
Super-resolution Imaging of Limited-size Objects
Taeyong Chang, Giorgio Adamo, Nikolay I. Zheludev
Improvement of label-free far-field resolution of optical imaging is possible with prior knowledge of the object such as its sparsity or accumulated by a posteriori examination of…
Resolving Complex Subwavelength Grating Structures Using Topologically Structured Light
Thomas A. Grant, Eric Plum, Nikolay I. Zheludev +1
It has been seen recently that when probing a nanoscale object to determine, for example, size or position via light scattering, significant advantage in measurement precision can…
Controlling the Flow of Information in Optical Metrology
Maximilian Weimar, Huanli Zhou, Luca Neubacher +5
Optical metrology has progressed beyond the Abbe-Rayleigh limit, unlocking (sub)atomic precision by leveraging nonlinear phenomena, statistical accumulation, and AI estimators trai…
Simultaneous Superoscillations in Space and Time in Nonseparable Light Pulses
Yijie Shen, Nikitas Papasimakis, Nikolay I. Zheludev
A remarkable phenomenon of superoscillations implies that electromagnetic waves can locally oscillate in space or time faster than the fastest spatial and temporal Fourier componen…
Localization of nanoscale objects with light singularities
Thomas A. Grant, Anton N. Vetlugin, Eric Plum +2
Unprecedented atomic-scale measurement resolution has recently been demonstrated in single-shot optical localization metrology based on deep-learning analyses of diffraction patter…
Breaking of Time Translation Symmetry and Ergodicity, and Entropy decrease in a Continuous Time Crystal Driven by Nonreciprocal Optical Forces
Tongjun Liu, Venugopal Raskatla, Jinxiang Li +2
Nonreciprocal nonequilibrium process are attracting growing interest in sociology, animal behaviour, chemistry, and nanotechnology, and may have played a role in the origin of life…
Retrieving positions of closely packed sub-wavelength nanoparticles from their diffraction patterns
Benquan Wang, Ruyi An, Eng Aik Chan +6
Distinguishing two objects or point sources located closer than the Rayleigh distance is impossible in conventional microscopy. Understandably, the task becomes increasingly harder…
Free-Space Propagation and Skyrmion Topology of Toroidal Electromagnetic Pulses
Ren Wang, Zhi-Qiang Hu, Pan-Yi Bao +4
Toroidal electromagnetic pulses have been recently reported as nontransverse, space-time nonseparable topological excitations of free space [Nat. Photon. 16, 523-528 (2022)]. Howev…
Continuous Space-Time Crystal State Driven by Nonreciprocal Optical Forces
Venugopal Raskatla, Tongjun Liu, Jinxiang Li +2
Continuous time crystals (CTCs) - media with broken continuous time translation symmetry - are an eagerly sought state of matter that spontaneously transition from a time-independe…
Nondiffracting Supertoroidal Pulses: Optical "Kármán vortex streets"
Yijie Shen, Nikitas Papasimakis, Nikolay I. Zheludev
Recently introduced supertoroidal light pulses [Nat. Commun. 15, 5891 (2021)] are a family of space-time nonseparable freespace electromagnetic excitations with unique topological…
Modulating light with light via giant nano-opto-mechanical nonlinearity of plasmonic metamaterial
Jun-Yu Ou, Eric Plum, Jianfa Zhang +1
From the demonstration of saturable absorption by Vavilow and Levshin in 1926, and with invention of the laser, unavailability of strongly nonlinear materials was a key obstacle fo…
Metamaterial 'Gecko Toe': Optically-Controlled Adhesion to Any Surface
J. Zhang, K. F. MacDonald, N. I. Zheludev
On the mesoscopic scale, electromagnetic forces are of fundamental importance to an enormously diverse range of systems, from optical tweezers to the adhesion of gecko toes. Here w…
The light-well: A tuneable free-electron light source on a chip
G. Adamo, Y. H. Fu, C-M. Wang +4
The passage of a free-electron beam through a nano-hole in a periodically layered metal/dielectric structure creates a new type of tuneable, nanoscale radiation source - a 'light-w…
Controlling the coexistence of structural phases and the optical properties of gallium nanoparticles with optical excitation
K. F. MacDonald, V. A. Fedotov, S. Pochon +3
We have observed reversible structural transformations, induced by optical excitation at 1.55 micrometer, between the beta, gamma and liquid phases of gallium in self-assembled gal…
Phase coexistence in Gallium nanoparticles controlled by electron excitation
S. Pochon, K. F. MacDonald, R. J. Knize +1
In Gallium nanoparticles of 100 nm in diameter grown on the tip of an optical fiber from an atomic beam we observed equilibrium coexistence of gamma, beta and liquid structural pha…