{'fraction_non_alphanumeric': 0.018292682926829267, 'fraction_numerical': 0.007621951219512195, 'mean_word_length': 5.19811320754717, '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}}
Highly Repetitive Picosecond Polarization Switching in Type-II AlGaAs/AlAs Multiple Quantum Well Structures

We have demonstrated highly repetitive picosecond polarization optical switching operation of type-II quantum well structures at room temperature. The switching mechanism is due to the fast Γ-X interlayer scattering of electrons and the fast spin relaxation of holes. According to our experimental results, the switching time is less than 1 ps, the switching power is as low as 3 nJ/cm2, and the switching repetition rate is more than 80 GHz. Moreover we point out the possibility of continuous optical switching operation for future applications.