{'fraction_non_alphanumeric': 0.015853658536585366, 'fraction_numerical': 0.00975609756097561, 'mean_word_length': 5.21969696969697, '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}}
Fast THz modulator based on the HEMT-metamaterial

Utilizing THz wave to transmit data for communication and imaging places high demands in phase and amplitude modulation. In this paper we combined a metamaterial array with HEMT structure to form a multiband electronic grid-controlled THz modulator. By controlling the carrier concentration of 2DEG, resonant mode conversions between four different complex resonances have been realized. This mode conversion THz modulator has four amplitude modulation bands and three phase modulation bands. More importantly, modulation depth in every amplitude band is more than 90% and phase shift in phase bands is commonly about 90 degree, and over 120 degree maximally. It may provide a way to achieve effective and multi-band active devices in THz wireless communication system.