Tag

Terahertz

All articles tagged with #terahertz

science2 days ago•20 min saved

Terahertz cavities engineer attractive interactions in bilayer graphene

Terahertz cavity photons mediate tunable attractive interactions in bilayer graphene, reorganizing interband transitions into an exciton-like bound state. Using a broadband terahertz microscope integrated with dual-gated 2D materials in a THz cavity, researchers observe tunable bandgaps and ultrastrong coupling (g/ωc ≈ 0.4) with a cavity-induced resonance that persists across a wide temperature range, pointing to a platform for exploring hybrid light–matter phases in 2D quantum materials.

via Nature|

#bilayer-graphene #cavity-quantum-electrodynamics #excitons

science3 months ago•5 min saved

Terahertz microscope unmasks quantum vibrations of superconducting electrons

MIT researchers developed a terahertz microscope that uses spintronic emitters and a Bragg mirror to compress terahertz light to micron-scale spots, enabling imaging of the collective terahertz oscillations of superconducting electrons in BSCCO at cryogenic temperatures and overcoming the diffraction limit—a breakthrough for studying quantum modes in materials with potential implications for room-temperature superconductivity and terahertz devices.

via MIT News|

#bscco #microscopy #science

science3 months ago•19 min saved

Direct THz Plasmon Imaging Reveals 2D Superconducting Superfluid

Researchers used near-field terahertz spectroscopy with a spintronic THz emitter to image a below-gap, two-dimensional superfluid plasmon in few-layer Bi2Sr2CaCu2O8+x. The resonance, observed only in the superconducting phase and absent in bulk samples, was mapped for its dispersion and geometric anisotropy, providing a direct, spatially resolved view of momentum- and frequency-dependent 2D superconductivity and the superfluid stiffness within the CuO2 planes.

via Nature|

#near-field-microscopy #plasmon #science

science8 months ago•3 min saved

Innovative control of terahertz light promises faster, smaller electronics

Scientists have developed a method to precisely control terahertz waves using topological insulators, enabling smaller, faster, and more efficient electronic and communication devices by confining and guiding light at the nanoscale, which could revolutionize data transmission, medical imaging, and quantum computing.

via Phys.org|

#light-control #nanotechnology #quantum-devices