{'fraction_non_alphanumeric': 0.044740024183796856, 'fraction_numerical': 0.013301088270858524, 'mean_word_length': 5.225563909774436, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Instrumentation of terahertz time-domain spectroscopic system including two kinds of THz-radiation source

We designed a THz time-domain spectroscopic system including two kinds of THz-radiation source, i.e., low-temperature-grown GaAs photoconductive switching substrate and 4- dimethylamino-N-methyl- 4-stibazolium tosylate (DAST) crystal. The detector is common, low-temperature-grown GaAs photoconductive switching substrate, for two sources which can be replaced one another. The frequency-domain spectral ranges are 0.04-4.0 THz and 0.1-8.0 THz for the wave sources of low-temperature-grown GaAs photoconductive switching substrate and DAST crystal, respectively. The spectral data for pellet samples indicate that two kinds of THz-radiation source provide complementary information and extend the application of THz-TDS.