Columbia University

3m Innovative Properties Company

Adam Overvig

Craig R Schardt

Bing Hao

Karl K Stensvad

Nanfang Yu

Andrea Alu

Meng Tian

Norman Nan Shi

Jyotirmoy Mandal

Sajan Shrestha

Xuexue Guo

Stephanie Malek

Techniques for creating a replacement for optical elements with diffractive planar components based on metasurfaces are provided. In one example, a substantially flat optical component for lensing incoming electromagnetic radiation having at least one wavelength and a first phase into outgoing electromagnetic radiation having a second phase is provided.

Broadband achromatic flat optical components by dispersion-engineered dielectric metasurfaces

The disclosed subject matter provides systems and methods for spatial and spectral modulation of light. An example system for modulating light can include a substrate and a plurality of meta units, coupled to the substrate and configured to spatially and spectrally modulate the light, wherein the plurality of meta units includes a perturbation and forms a perturbed lattice supporting a quasi-bound state in the continuum.

Multifunctional resonant and leaky-wave metasurfaces based on symmetry-breaking perturbations

Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.

Systems and methods for radiative cooling and heating

Growing community of inventors

New York, NY, United States of America

Adam Overvig