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Items tagged with: optics

Hi @Dhan Hurley this sounds really interesting. As you mentioned it provides a 5 base logic compared to our current 2 base logic. I don't know much about that topic, but I read an article about a Chinese team who built a quantic computer that outperforms all we know currently. If I remember well it was able to provide 3 base logic. I assume even on a 2 base logic, a quantic technology would be faster right? What would be the benefit of an analogic solution like this?

#metastructures #equations #light #analog #nanophotonic #physics #electronics #optics #science #metamaterial #technology #computer

Inverse-designed metastructures that solve equations....Signal processing of light waves can be used to represent certain mathematical functions and to perform computational tasks on signals or images in an analog fashion. Such processing typically requires complex systems of bulk optical elements such as lenses, filters, and mirrors. Mohammadi Estakhri et al. demonstrate that specially designed nanophotonic structures can take input waveforms encoded as complex mathematical functions, manipulate them, and provide an output that is the integral of the functions. The results, demonstrated for microwaves, provide a route to develop chip-based analog optical computers and computing elements.
Metastructures hold the potential to bring a new twist to the field of spatial-domain optical analog computing: migrating from free-space and bulky systems into conceptually wavelength-sized elements. We introduce a metamaterial platform capable of
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Self-stabilizing photonic levitation and propulsion of nanostructured macroscopic objects....
Light is a powerful tool to manipulate matter, but existing approaches often necessitate focused, high-intensity light that limits the manipulated object’s shape, material and size. Here, we report that self-stabilizing optical manipulation of macroscopic—millimetre-, centimetre- and even metre-scale—objects could be achieved by controlling the anisotropy of light scattering along the object’s surface. In a scalable design that features silicon resonators on silica substrate, we identify nanophotonic structures that can self-stabilize when rotated and/or translated relative to the optical axis. Nanoscale control of scattering across a large area creates restoring behaviour by engineering the scattered phase, without needing to focus incident light or excessively constrain the shape, size or material co... show more

New approach improving stability and optical properties of perovskite films....Metal halide perovskites are regarded as next generation materials for light emitting devices (LEDs).A recent joint-research co-led by the scientist from City University of Hong Kong (CityU) has developed a new and efficient fabrication approach to produce all-inorganic perovskite films with better optical properties and stability,enabling the development of high colour-purity and low-cost perovskite LEDs with a high operational lifetime.

Out-of-plane computer-generated multicolor waveguide holography.... Lens-Free,Multicolor. Compact 3D Displays.... In this study, we first propose and experimentally demonstrate a multicolor, computer-generated hologram (CGH) in an all-dielectric waveguide metasurface system. Light beams from three different color laser sources (red, green, and blue) are coupled into the waveguide via a single-period grating without any beam splitters or prisms. A multicolor holographic image can be decoupled in the far field through a binary metasurface CGH without any lenses. This technology enables lens-free, ultraminiature augmented and virtual reality displays.


Schrödinger's cat: alive AND dead (new experiments)

Deterministic creation of entangled atom–light Schrödinger-cat states

- Bastian Hacker
- Stephan Welte
- Severin Daiss
- Armin Shaukat
- Stephan Ritter
- Lin Li
- Gerhard Rempe

Nature Photonics, volume 13; pages 110–115 (2019)


- Quantum information
- Quantum optics
- Qubits
- Single photons and quantum effects


Quantum physics allows for entanglement between microscopic and macroscopic objects, described by discrete and continuous variables, respective
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