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- W4200104042 abstract "Terahertz time-domain spectroscopy was used to make experiment and investigation for the characteristics of high quality 0.3BaSrTiO<sub>3</sub>-0.7NdAlO<sub>3</sub> ceramics in the terahertz range, which was made by the solid state reaction method. The frequency resolution of experiment system was 4.5 GHz, and all-solid-state 532nm laser was used as external optical pump, which obliquely incidence on the surface of the sample at the angle of 45°. From the experiment that when the external optical pump’s intensity increased from 0 mW to 300 mW at room temperature, the 0.3BaSrTiO<sub>3</sub>-0.7NdAlO<sub>3</sub> ceramics’ transmission waveform time shifts could be obviously observed, and with the increasing power of pump laser, the absorption coefficient could be modulated, the modulation range varied from 21.38 cm<sup>-1</sup> to 13.77 cm<sup>-1</sup> and the modulation depth nearly reached up to 36% at 0.55 THz. Further analysis showed that the micro-mechanism of absorption coefficient modulation with the intensity of external optical pump was attributed to the internal space charge field in the 0.3BaSrTiO<sub>3</sub>-0.7NdAlO<sub>3</sub> ceramics caused by the excited free carriers. The experiment and analysis proved that the 0.3BaSrTiO<sub>3</sub>-0.7NdAlO<sub>3</sub> ceramics have higher tunability, lower dielectric loss and good temperature stability in THz range, which will have good reference value and wide application for communication in THz range." @default.
- W4200104042 created "2021-12-31" @default.
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- W4200104042 date "2021-12-13" @default.
- W4200104042 modified "2023-09-27" @default.
- W4200104042 title "Experiment and analysis of external optical pump modulation for the 0.3BaSrTiO3-0.7NdAlO3 ceramic's characteristics in terahertz range" @default.
- W4200104042 doi "https://doi.org/10.1117/12.2603927" @default.
- W4200104042 hasPublicationYear "2021" @default.
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