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“#A survey on optical memory and optical RAM technologies” a master-slave scheme, b feedback loop scheme, c injection-locking technique and d phase-change material (PCM) properties in the case of GST compounds. Credit: by Alexoudi, T., Kanellos, G.T. & Pleros, N. Over the past decades, ‘storing light’ has appeared as a rather controversial concept, given that…
Topological insulators are a new phase of matter unique for their insulating bulk and perfectly conducting edges. They have been at the forefront of condensed matter physics for the past decade, and more recently inspired the emergence of topological phases in many classical-wave systems, such as photonics and acoustics. To date, all studies of topological…
“#Synthetic dimensions enable a new way to construct higher-order topological insulators” a, An array of coupled ring resonators (green), each with an embedded electro-optic modulator (orange). b, The corresponding lattice in real and synthetic dimensions, x and frequency, respectively. The lattice shows higher-order topological behavior, such as the existence of corner modes. (c), Real-space structure…
“#New detection method turns silicon cameras into mid-infrared detectors” Artistic rendering of the principle of non-degenerate two-photon absorption (NTA) for the detection of mid-infrared (MIR) by a silicon-based camera. In this detection technique, the sensor is illuminated directly by the MIR light beam, while a second, near-infrared (NIR) beam is also incident on the sensor….
“#Temporal aiming with temporal metamaterials” a, an incoming electromagnetic wave travels in an unbounded medium with an isotropic permittivity. b, by rapidly changing the permittivity of the medium in time from isotropic to an anisotropic tensor (with the x component of permittivity smaller than its z component) a temporal boundary is introduced producing forward and…
“#Physicists find ways to control gamma radiation” Energy scheme of the radioactive source of 14.4 keV photons and the vibrating absorber used in the experiment. Credit: Kazan Federal University Researchers from Kazan Federal University, Texas A&M University and Institute of Applied Physics (Russian Academy of Sciences) found ways to direct high frequency gamma radiation by means…
“#Fast and flexible computation of optical diffraction” by Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, Chinese Academy </p><div> <div> <div data-src=”https://scx2.b-cdn.net/gfx/news/hires/2020/fastandflexi.jpg” data-sub-html=”(a) Sketch of the optical system. (b) CGH displayed on the SLM for the generation of a 9×9 foci array. (c) The foci array on the focal plane of Lens…
“#New technology speeds up organic data transfer” Credit: CC0 Public Domain Researchers are pushing the boundaries of data speed with a brand new type of organic LED. An international research team, involving Newcastle University experts, developed a visible light communication (VLC) setup capable of a data rate of 2.2 Mb/s by employing a new type…
“#Regular arrays of silicon nanoparticles key to improving light emissions in nanophotonic devices” Credit: Eindhoven University of Technology Nanophotonics considers how light and matter at the nanoscale interact with each other, with findings in the field being important for nanofabrication techniques and in future photonic devices. Until recently, metallic nanoparticles have been predominantly used in…
“#Transparent inorganic multicolour displays enabled by zinc-based electrochromic devices” by Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, Chinese Academy </p><div> <div> <div data-src=”https://scx2.b-cdn.net/gfx/news/hires/2020/transparenti.jpg” data-sub-html=”a, Schematic diagram of the bar-coating process. The inset shows a digital photograph of the SVO/cellulose paste. b, Schematic illustration of a Zn-SVO electrochromic display platform. c, Schematic…