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.
When physicists at the ARC Centre for Transformative Meta-Optical Systems (TMOS) needed a key component for their terahertz experiments, they ran into a frustrating problem—they needed tiny optical devices, known as wire-grid ...
Optics & Photonics
Aug 21, 2026
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262
An international team of researchers from École Polytechnique, Collège de France and Helmholtz-Zentrum Dresden-Rossendorf (HZDR) has achieved a world first: the experimental realization of an all-optical photonic time crystal ...
Optics & Photonics
Jul 30, 2026
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235
How could we noninvasively distinguish between healthy and cancerous tissue? And how could we increase the speed of wireless communications? These two seemingly unrelated questions may share the same answer: terahertz (THz) ...
Optics & Photonics
Jun 23, 2026
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Scientists have demonstrated a noninvasive technique that uses light to reveal the hidden contents of chicken eggs, potentially helping to curb the meat industry's practice of killing billions of male chicks at birth. The ...
Biotechnology
Jun 19, 2026
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25
The terahertz (THz) frequency regime, sitting between microwaves and infrared light, has long promised revolutionary advances in wireless communication, security imaging and nondestructive sensing. A key roadblock, however, ...
Nanophysics
Jun 7, 2026
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Biophotonics is a multidisciplinary field that involves the development and application of light-based technologies to study, monitor and treat biological systems. The ability to directly image cells and molecules has led ...
Biotechnology
Jun 7, 2026
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39
Being able to see light and detect radiation is of utmost importance at any frequency. While this challenge has been solved in the visible range, radiation detectors in the far-infrared and terahertz regimes are either not ...
Optics & Photonics
May 23, 2026
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78
Researchers at the University of California, Los Angeles (UCLA) have developed a novel image projection system that delivers super-resolution images over an extended depth of field. By combining a neural network-based digital ...
Optics & Photonics
May 19, 2026
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In new research published in Nature Materials, a team of researchers led by Columbia University chemist Xiaoyang Zhu, in collaboration with fellow Columbians Xavier Roy, Milan Delor, Dmitri Basov, and James McIver, has observed ...
Condensed Matter
May 11, 2026
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23
A two-dimensional lamellar crystal composed of atomically thin layers of lead iodide (PbI2) could be used to manufacture a new generation of circuits that use light and mechanical vibrations (rather than electrons) to transmit ...
Condensed Matter
May 5, 2026
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