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Showing posts with the label resonator

Light trapped in programmable subwavelength air cavities etched into high-refractive-index dielectric 2D bismuth telluride

https://www.eurekalert.org/news-releases/1118367 "silicon dielectric resonators trap light inside solids, keeping light away from surface, making interaction with 2D materials placed on top difficult... overcome trapping in air, concentrating/ interacting with tungsten disulfide located at cavity's top of cavity boosting light emission/ nonlinear optical signals... changing air voids' radius/ depth programs light interaction, tuning resonant wavelength to match specific materials... optical computing/ signal processing, more efficient LEDs/ lasers/ sensors" Related: Poking a nanostring: Scientists uncover energy cascades in tiny resonators https://phys.org/news/2026-03-nanostring-scientists-uncover-energy-cascades.html

Temporally oscillating magnetic field generates Floquet scattering resonances enabling atomic interaction magnetic control in ultra-cold gas

https://phys.org/news/2025-10-atomic-interactions-ultracold-gas-button.html "atoms' attraction/ repulsion, resonances, scattering behavior controllable over wide range by manipulating magnetic field oscillation's strength/ frequency using external magnet... this wide range control goes beyond using Feshbach scattering resonances where quantum mechanical systems' interaction was fixed at single value... quantum gases achieving previously unattainable states, dynamically generating bound states... manipulation analogous to using push button controls"

High-quality nanomechanical triangline resonators with built-in piezoelectricity could further quantum sensing

https://www.eurekalert.org/news-releases/1063641 "μm/ nm -scale aluminum nitride mechanical resonators oscillate at much higher frequencies for long times without losing energy., sensing minuscule forces/ mass changes... tensile-stressed (1GPa) 295 nm silicon nitride with functional material on top, maintaining dissipation dilution boost mechanical factor >10 million... direct readout in sensing applications, also interfacing mechanical/ electric degrees of freedom for quantum information transduction... maintains single quantum coherent oscillation at room temperature"

Bowtie resonators that build themselves bridge the gap between nanoscopic and macroscopic

https://phys.org/news/2023-12-bowtie-resonators-bridge-gap-nanoscopic.html "self-assembled cavity integrated into larger self-assembled components for routing light in optical chip... atomic dimensions enabled by self-assembly with conventional semiconductor scalability... 2 halves of silicon structures are suspended on springs, Casimir force attracts them and van der Waals force sticks them together, resulting in self-assembled resonator with bowtie-shaped gaps surrounded by silicon mirrors... self-assembled photonic resonators for use in electronics, nanorobotics, sensors, quantum technologies" Related: Self-assembly of complex systems: Hexagonal building blocks are better https://phys.org/news/2024-04-complex-hexagonal-blocks.html Researchers tune Casimir force using magnetic fields https://phys.org/news/2024-06-tune-casimir-magnetic-fields.html  see also: A method to reversibly control Casimir forces using external magnetic fields  https://phys.org/news/2024-06-method-rev...

Electromechanical resonators operating at sub-terahertz frequencies

https://techxplore.com/news/2023-04-electromechanical-resonators-sub-terahertz-frequencies.html "communication speed and efficiency... millimeter-wave dual rail resonator placed on top of suspended lithium niobate beam by chemically etched away silicon dioxide underneath minimizing loss of acoustic waves... millimeter-wave dual rail resonator... lithium niobate widely employed for semiconductors facilitate large-scale fabrication... frequencies between 95 GHz and 3 THz resilient to thermal fluctuations than GHz resonators... reach quantum ground state at accessible Kelvin temperatures" Related: Nanoelectromechanical resonators based on hafnia–zirconia–alumina superlattices with gigahertz spectrum coverage https://phys.org/news/2023-08-nanoelectromechanical-resonators-based-hafniazirconiaalumina-superlattices.html

Researchers create first supermode optical resonator

https://phys.org/news/2023-02-supermode-optical-resonator.html "optics, lasers, microscopy, sensing, telecommunications... not only control intensity and frequency of light, but now also mode of light, which determines the shape and manner in which photons flow... Also enables multi-mode coupled light... etching new type of pattern, 300-600 nm in size, on surface of reflectors at each end of silicon-on-insulator integrated photonics platform... Combining more than one mode of light creates supermode, breaking symmetry inside resonator... huge impact on bandwidth"