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Astronomy May 10, 2023

Stephen Hawking and I created his final theory of the cosmos—here's what it reveals about the origins of time and life

The late physicist Stephen Hawking first asked me to work with him to develop "a new quantum theory of the Big Bang" in 1998. What started out as a doctoral project evolved over some 20 years into an intense collaboration ...

Nanophysics May 8, 2023

Leaky-wave metasurfaces: A perfect interface between free-space and integrated optical systems

Researchers at Columbia Engineering have developed a new class of integrated photonic devices—"leaky-wave metasurfaces"—that can convert light initially confined in an optical waveguide to an arbitrary optical pattern ...

Optics & Photonics Apr 13, 2023

New light sheet holography overcomes the depth perception challenge in 3D holograms

Holography—the use of light projection to display images—can be used to construct holograms, which are three-dimensional structures of light that depict true-to-life objects and scenes. While today's technologies can't ...

Optics & Photonics Apr 6, 2023

Technology advance paves way to more realistic 3D holograms for virtual reality and more

Researchers have developed a new way to create dynamic ultrahigh-density 3D holographic projections. By packing more details into a 3D image, this type of hologram could enable realistic representations of the world around ...

Optics & Photonics Apr 5, 2023

Lensless complex amplitude demodulation based on deep learning in holographic data storage

In the era of big data, global data volume is growing exponentially. The development of numerous technologies depends on massive data and also generates massive data. Data mining, storage, and protection are becoming increasingly ...

Optics & Photonics Mar 31, 2023

Bringing angular momentum to holograms and metasurfaces

Holography, invented by Gabor, provides an approach for recording and reconstructing the complete information (i.e. intensity and phase) of the light from an object. Since its invention, holographic-related technologies have ...

Optics & Photonics Mar 20, 2023

Direct field-to-pattern monolithic design of holographic metasurface

Metasurfaces, as two-dimensional metamaterials, display fascinating ability in electromagnetic (EM) modulation within a sub-wavelength scale, opening up a new way for manipulating the properties of EM wave in a plane. Owing ...

Optics & Photonics Mar 20, 2023

Ultrafast beam-steering breakthrough

In a major breakthrough in the fields of nanophotonics and ultrafast optics, a Sandia National Laboratories research team has demonstrated the ability to dynamically steer light pulses from conventional, so-called incoherent ...

Biotechnology Feb 24, 2023

Making engineered cells dance to ultrasound

Let's say you needed to move an individual cell from one place to another. How would you do it? Maybe some special tweezers? A really tiny shovel?

Nanophysics Dec 22, 2022

Shrinking hydrogels enlarge nanofabrication options

Researchers from Carnegie Mellon University and the Chinese University of Hong Kong have developed a strategy for creating ultrahigh-resolution, complex 3D nanostructures out of various materials.

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