Investigation of stretchable carbon nanotube films under under ultra-fast pump-probe spectroscopy
M. Paukov,1, A. Goldt,2, A. Nasibulin,2, James Lloyd-Hughes,3, A. Arsenin,1, V. Volkov,1, M. Burdanova,1,4
1 - Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
2 - Skolkovo Institute of Science and Technology, Moscow
3 - University of Warwick, Department of Physics, Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
4 - Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
Abstract
Modulation of THz-waves paves a way for the communication systems of future generation. In this work terahertz modulators based on stretchable films with carbon nanotubes are presented. We applied optical-pump-terahertz-probe spectroscopy method to report their fundamental and experimental results. The information on the photo-induced conductivity of differently stretched CNT-films and the decay-time, which reveals the character of recombination of charge particles under the pump-light is provided. Practical parameters of CNT such as modulation depth (MD), modulation speed (MS), energy modulation depth (EMD) for different relative stretching were obtained. The experiment has shown that CNT possess highly effective characteristics, compared to previously studied materials (MD up to 98% and MS up to 250 GHz). The novelty of these modulators includes their possibility to control properties not only by the means of the intensity of light, but also by stretching.
Speaker
Paukov Maksim
Moscow Institute of Physics and Technology (National Research University)
Russia
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