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  2. Terahertz spectroscopy and technology - Wikipedia

    en.wikipedia.org/wiki/Terahertz_spectroscopy_and...

    Terahertz spectroscopy detects and controls properties of matter with electromagnetic fields that are in the frequency range between a few hundred gigahertz and several terahertz (abbreviated as THz). In many-body systems, several of the relevant states have an energy difference that matches with the energy of a THz photon.

  3. Terahertz radiation - Wikipedia

    en.wikipedia.org/wiki/Terahertz_radiation

    Terahertz waves lie at the far end of the infrared band, just before the start of the microwave band. Terahertz radiation – also known as submillimeter radiation, terahertz waves, tremendously high frequency (THF), T-rays, T-waves, T-light, T-lux or THz – consists of electromagnetic waves within the ITU-designated band of frequencies from 0.3 to 3 terahertz (THz), although the upper ...

  4. Terahertz time-domain spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Terahertz_time-domain...

    In physics, terahertz time-domain spectroscopy ( THz-TDS) is a spectroscopic technique in which the properties of matter are probed with short pulses of terahertz radiation. The generation and detection scheme is sensitive to the sample's effect on both the amplitude and the phase of the terahertz radiation. Fourier transform of the above pulse.

  5. Spectral resolution - Wikipedia

    en.wikipedia.org/wiki/Spectral_resolution

    Spectral resolution. The spectral resolution of a spectrograph, or, more generally, of a frequency spectrum, is a measure of its ability to resolve features in the electromagnetic spectrum. It is usually denoted by , and is closely related to the resolving power of the spectrograph, defined as. where is the smallest difference in wavelengths ...

  6. Digital television - Wikipedia

    en.wikipedia.org/wiki/Digital_television

    Digital television ( DTV) is the transmission of television signals using digital encoding, in contrast to the earlier analog television technology which used analog signals. At the time of its development it was considered an innovative advancement and represented the first significant evolution in television technology since color television ...

  7. Thermal desorption spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Thermal_desorption...

    Temperature programmed desorption (TPD) is the method of observing desorbed molecules from a surface when the surface temperature is increased. When experiments are performed using well-defined surfaces of single-crystalline samples in a continuously pumped ultra-high vacuum (UHV) chamber, then this experimental technique is often also referred to as thermal desorption spectroscopy or thermal ...

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