Optical techniques are experimental and analytical methods that exploit the generation, manipulation, and detection of electromagnetic radiation in the ultraviolet, visible, and infrared ranges to probe material properties, structures, and dynamics. They encompass approaches such as absorption, fluorescence, Raman and elastic scattering measurements, interferometry, and imaging modalities that rely on well-defined light–matter interactions. These techniques enable quantitative characterization of refractive indices, absorption coefficients, energy level structures, molecular conformations, and nanoscale morphology, often with high spatial and temporal resolution. Optical techniques are widely integrated with spectroscopy, microscopy, and metrology platforms and can be implemented in both far-field and near-field configurations.
Imagine standing by a lake and throwing a stone into the water. Waves spread out in circular patterns and can reflect at obstacles and boundaries. Researchers at the University of Regensburg, in collaboration with colleagues ...
Nanophysics
Jan 16, 2025
0
139
Researchers have developed a reliable and reproducible way to fabricate tapered polymer optical fibers that can be used to deliver light to the brain. These fibers could be used in animal studies to help scientists better ...
Optics & Photonics
Jan 15, 2025
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53
Depth degradation is a problem biologists know all too well: The deeper you look into a sample, the fuzzier the image becomes. A worm embryo or a piece of tissue may only be tens of microns thick, but the bending of light ...
Optics & Photonics
Jan 7, 2025
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63
Prof Zhang Zhiyong's team at Peking University developed a heterojunction-gated field-effect transistor (HGFET) that achieves high sensitivity in short-wave infrared detection, with a recorded specific detectivity above 1014 ...
Optics & Photonics
Jan 2, 2025
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60
Mechanical force is an essential feature for many physical and biological processes. Remote measurement of mechanical signals with high sensitivity and spatial resolution is needed for a wide range of applications, from robotics ...
Nanophysics
Jan 1, 2025
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117
In a breakthrough set to revolutionize the semiconductor industry, the School of Engineering of the Hong Kong University of Science and Technology (HKUST) has developed the world's first-of-its-kind deep-ultraviolet (UVC) ...
Nanophysics
Dec 30, 2024
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106
Optical tweezers and related techniques provide extraordinary opportunities for research and applications in the physical, biological, and medical fields. However, certain requirements such as high-intensity laser beams, ...
Optics & Photonics
Dec 27, 2024
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32
A research team led by Prof. Li Chuanfeng from the University of Science and Technology of China (USTC) has achieved a breakthrough in quantum photonics. They developed an on-chip photonic simulator capable of simulating ...
Optics & Photonics
Dec 27, 2024
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88
A novel nanobody-based immunosensor, designed to function stably in undiluted biological fluids and harsh conditions, has been developed, report researchers from Science Tokyo. Their innovative design leverages BRET—bioluminescence ...
Bio & Medicine
Dec 17, 2024
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22
Copper-oxide (CuO2) superconductors, such as Bi2Sr2CaCu2O8+δ (Bi2212), have unusually high critical temperatures. Optical reflectivity measurements of Bi2212 have shown that it exhibits strong optical anisotropy. However, ...
Optics & Photonics
Dec 12, 2024
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