Terahertz techniques encompass a set of experimental and analytical methods that generate, manipulate, and detect electromagnetic radiation in the terahertz (THz) frequency range, typically 0.1–10 THz, for probing material properties and dynamical processes. Core approaches include time-domain spectroscopy using ultrafast lasers and nonlinear crystals or photoconductive antennas, frequency-domain spectroscopy with continuous-wave THz sources, and imaging modalities exploiting THz transmission, reflection, or near-field interactions. These techniques enable characterization of low-energy excitations, carrier dynamics, vibrational and rotational modes, and dielectric responses in solids, liquids, gases, and biological tissues, often with depth resolution and spectroscopic contrast.
MIT physicists have created a new and long-lasting magnetic state in a material, using only light.
Condensed Matter
Dec 18, 2024
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107
An innovative planar spoof plasmonic neural network (SPNN) platform capable of directly detecting and processing terahertz (THz) electromagnetic signals has been unveiled by researchers at City University of Hong Kong (CityUHK) ...
Optics & Photonics
Nov 11, 2024
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46
A team of researchers from the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg, Germany, and Brookhaven National Laboratory in the United States has demonstrated a new way to study disorder ...
Superconductivity
Sep 16, 2024
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138
Imagine how a phone call works: Your voice is converted into electronic signals, shifted up to higher frequencies, transmitted over long distances, and then shifted back down so it can be heard clearly on the other end. The ...
Nanophysics
Sep 4, 2024
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136
Terahertz (THz) waves and THz technologies have gradually opened a new style for communications, cloud-based storage/computing, information contest, and medical tools. With the advancement of THz technologies, studies on ...
Optics & Photonics
Sep 2, 2024
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75
Researchers have developed a novel method for generating structured terahertz light beams using programmable spintronic emitters. This breakthrough offers a significant leap forward in terahertz technology, enabling the generation ...
Optics & Photonics
Jul 8, 2024
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232
Scientists at the University of Konstanz in Germany have advanced ultrafast electron microscopy to unprecedented time resolution. Reporting in Science Advances, the research team presents a method for the all-optical control, ...
Optics & Photonics
Jun 26, 2024
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122
The membrane protein bacteriorhodopsin is a proton pump, in which proton transport is initiated by the light-induced isomerization of the chromophore retinal. The molecular quantum states involved in this ultrafast reaction ...
Optics & Photonics
Jun 25, 2024
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77
Terahertz technology could help us meet the ever-increasing demand for faster data transfer rates. However, the down-conversion of a terahertz signal to arbitrary lower frequencies is difficult.
Optics & Photonics
Jun 24, 2024
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78
Terahertz waves are being intensely studied by researchers around the world seeking to understand the "terahertz gap." Terahertz waves have a specific frequency that puts them somewhere between microwaves and infrared light. ...
Condensed Matter
Jun 19, 2024
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125
