What is a terahertz laser?
What is a terahertz laser?
Far-infrared laser or terahertz laser (FIR laser, THz laser) is a laser with output wavelength in between 30-1000 µm (frequency 0.3-10 THz), in the far infrared or terahertz frequency band of the electromagnetic spectrum.
What is terahertz Pulsed Imaging?
THz pulsed imaging actually can be viewed as an extension of the THz-TDS method. In addition to providing valuable spectral information, 2D images can be obtained with THz-TDS by spatial scanning of either the THz beam or the object itself.
What is terahertz camera?
Terahertz imaging cameras in the frequency range 10 GHz — 1 THz. The detection mechanism is based on excitation of plasma oscillations in a two-dimensional electron system with subsequent rectification. Our terahertz cameras are active detecting devices, and require an external THz source.
What is terahertz radiation used for?
Terahertz radiation can penetrate fabrics and plastics, so it can be used in surveillance, such as security screening, to uncover concealed weapons on a person, remotely. This is of particular interest because many materials of interest have unique spectral “fingerprints” in the terahertz range.
Can infrared lasers damage your eyes?
Laser effects on the eye Retina: Laser light in the visible to near-infrared spectrum can cause damage to the retina. Since the tissue structures of the retina are unable to undergo any repair, lesions caused by the focusing of visible or near-infrared light on the retina may be permanent.
Is terahertz radiation safe?
THz radiation is non-ionizing and is considered to be safe for humans at low powers. THz waves are strongly absorbed by water molecules, which limits their penetration into tissues by hundreds or even tens of microns. Thus, skin tissue is the ideal target for imaging using THz radiation due to its superficial location.
Is terahertz electromagnetic?
The terahertz range refers to electromagnetic waves with frequencies between 100 GHz and 10 THz, or wavelengths between 3 mm and 30 μm. Light between radio waves and infrared has some unique properties. Terahertz can “look inside” plastics and textiles, paper and cardboard.
Can you go blind from IR laser?
Can a human be blinded with a laser with wavelength outside of seeing range? Yes. For example infrared lasers can cause substantial damage (they “cook” the eye). Lasers outside the visible range are even more dangerous than visible lasers because you don’t have any protective reflexes.
What is a terahertz laser? Far-infrared laser or terahertz laser (FIR laser, THz laser) is a laser with output wavelength in between 30-1000 µm (frequency 0.3-10 THz), in the far infrared or terahertz frequency band of the electromagnetic spectrum. What is terahertz Pulsed Imaging? THz pulsed imaging actually can be viewed as an extension of…