Optical methods are experimental and analytical techniques that exploit the interaction of electromagnetic radiation in the ultraviolet, visible, or infrared ranges with matter to probe, manipulate, or measure physical, chemical, or biological systems. They encompass approaches such as absorption, fluorescence, and Raman spectroscopy, interferometry, optical microscopy, and optical coherence tomography, relying on phenomena including reflection, refraction, diffraction, scattering, and emission. These methods provide high spatial and temporal resolution, enable non-contact and often non-destructive measurements, and are widely used for quantitative imaging, material characterization, environmental sensing, and in situ monitoring of dynamic processes in both fundamental research and applied technologies.
Fiber sensing scientists at Shenzhen University have developed a compact fiber optical nanomechanical probe (FONP) for measuring in vivo biomechanical properties of tissue and even single cells.
Bio & Medicine
Feb 10, 2023
0
177
Optical tweezers (OTs), also known as optical traps, are highly focused laser beams that can be used to trap and manipulate microscopic objects with a noncontact force. Employed in a wide range of nano and micro-scale operations, ...
Bio & Medicine
Oct 12, 2022
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102
Scientists have developed new materials for next-generation electronics so tiny that they are not only indistinguishable when closely packed, but they also don't reflect enough light to show fine details, such as colors, ...
Nanophysics
Nov 25, 2021
1
825
Conventional microscopes produce enlarged images of small structures or objects with the help of light. Nanoparticles, however, are so small that they hardly absorb or scatter light and, hence, remain invisible. Optical resonators ...
Nanophysics
Nov 11, 2021
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109
The apparent increase in hormone-induced cancers and disorders of the reproductive tract has led to a growing demand for new technologies capable of detecting nanogram per liter level endocrine disruptors. Scientists in China ...
Bio & Medicine
Sep 23, 2021
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77
Optoelectronics—technology that gives off, detects, or controls light—are used everywhere in modern electronics and include devices such as light-emitting diodes (LEDs) and solar cells. Within these devices, the movement ...
Nanophysics
Aug 25, 2021
0
297
