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1. A terahertz continuous wave imaging system was reported.

2. In this paper, the Terahertz (THz) continuous wave imaging system has been used to inspect the metal-knife which respectively concealed behind the paper box, polyethylene-foam and towel.

3. Plans to construct Europe's most intense terahertz (THz) radiation source to further development of cancer research are underway at the University of Liverpool.

4. This paper repotted the characters of Terahertz pulse radiation to stimulant sand - dust storm by using THz - TDS.

5. The intensity of terahertz waves tends to saturate with the increase of laser pulse energy.

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6. We have theoretically designed a terahertz - wave parametric oscillator based on the basic principle of Parametric Oscillator.

7. Photonic crystals can radiate terahertz wave through difference frequency effect. But the conversion efficiency of this process is very low.

8. A scheme for terahertz emission from laser interaction with plasmas has been proposed theoretically, which provides the possibility to produce high power table-top THz sources.

9. The excitonic Bloch oscillation is driven by the Terahertz field.

10. We report the experimental observation of light induced terahertz surface plasmons.

11. We study the influence of ionized impurity scattering on the electron transport in resonant-phonon-assisted terahertz (THz) quantum-cascade lasers (QCLs).

12. Using an excitonic basis , we take the density matrix theory to investigate the intraband dynamics process and optical absorption spectrum of semiconductor superlattice in Terahertz fields.

13. The lifetime of carriers in the photoconductor also has an impact on the terahertz wave.

14. In this thesis, a detailed discussion of plasma wave instability in the high-electron-mobility transistor (HEMT) driven by the terahertz radiation is presented.

15. Photoconductor antennas irradiated by ultrashort laser pulses can emit electromagnetic waves at the terahertz (THz) bandgap, which has been studied extensively and used widely as a terahertz source.

16. But by using a heterodyning architecture, the Harvard researchers demonstrated twin quantum cascade lasers, whose mixed output is in the terahertz gap.

17. Far-infrared absorption spectra and refractive indices of hypoxanthine and inosine have been measured by terahertz time-domain spectroscopy (THz-TDS) in the frequency range of 0.

18. This paper presents the absorption spectra of carbon monoxide measured by terahertz time-domain spectroscopy in the frequency range between 0. 2 and 2. 5 THz.