News

November 12, 2019

1 MIN READ

Multifunctional Metaoptics based on Bilayer Metasurfaces

Optical metasurfaces have become versatile platforms for manipulating the phase, amplitude, and polarization of light.

September 9, 2019

1 MIN READ

Revealing Environment Impacts on Organometal Halide Perovskites (OMHPs) Charge Transport

In this work, we explored the transport behavior and origins of the gas/environmental sensitivity in MAPbBr3 single crystals (SCs) devices by combining macroscopic and local probe measurements.

January 22, 2019

1 MIN READ

Topological Nanostructures Enable Nonlinear Light Generation

This work demonstrated a third-harmonic signal from a topologically non-trivial zigzag array of dielectric nanoparticles and strong enhancement of the nonlinear photon generation at the edge states of the nanofabricated array. The signal enhancement is due to the interaction between the Mie resonances of silicon nanoparticles and the topological localization of the electric field at the edges. There is topological protection against various perturbations and structural defects. Moreover, the interplay between topology, bianisotropy and nonlinearity makes such parametric photon generation tunable. This advance in topological photonics demonstrates a route to robust optical circuitry protected against disorder. S. Kruk, A. Poddubny, D. Smimova, L. Wang, A. Slobozhanyuk, A. Shorokhov, I Kravchenko, B. Luther-Davies, and Y. Kivshar, "Nonlinear light generation in topological nanostructures," Nature Nanotech. (2018). DOI: 10.1038/s41565-018-0324-7

November 20, 2018

6 MIN READ

ORNL technologies receive six R&D 100 Awards

Researchers at the Department of Energy’s Oak Ridge National Laboratory have received six R&D 100 Awards in recognition of their significant advancements in science and technology. The honorees were recognized over the weekend at the 56th annual R&D 100 Conference, sponsored by R&D Magazine.

October 10, 2018

1 MIN READ

3D Metasurface Enables Quantum Optics

This work shows that nonclassical multiphoton interferences can be achieved at the subwavelength scale in all-dielectric metasurfaces. Simultaneous imaging of multiple projections of quantum states with a single metasurface enables a robust reconstruction of amplitude, phase, coherence, and entanglement of multiphoton polarization-encoded states. K. Wang, J. G. Titchener, S. S. Kruk, L. Xu, H.-P. Chung, M. Parry, I. I. Kravchenko, Y.-H. Chen, A. S. Solntsev, Y. S. Kivshar, D. N. Neshev, and A. A. Sukhorukov, "Quantum metasurface for multiphoton interference and state reconstruction," Science 361 (6407), 1104-1108 (2018). DOI: 10.1126/science.aat8196

March 21, 2017

1 MIN READ

Edge States and Topological Phase Transitions in Chains of Dielectric Nanoparticles

April 26, 2016

1 MIN READ

Synthesis of two-dimensional GaSe/MoSe2 misfit heterojunctions by van der Waals epitaxy

Misfit heterojunctions formed by van der Waals (vdW) epitaxial growth of one crystalline metal chalcogenide monolayer on another was demonstrated for the first time to form p-n junctions that exhibit a photovoltaic response. Such heterojunction bilayers that display Moiré periodicity repre...