Ultrafast Optomechanical Terahertz Modulators Based on Stretchable Carbon Nanotube Thin Films

作     者：Maksim I.Paukov Vladimir V.Starchenko Dmitry V.Krasnikov Gennady A.Komandin Yuriy G.Gladush Sergey S.Zhukov Boris P.Gorshunov Albert G.Nasibulin Aleksey V.Arsenin Valentyn S.Volkov Maria G.Burdanova Maksim I.Paukov;Vladimir V.Starchenko;Dmitry V.Krasnikov;Gennady A.Komandin;Yuriy G.Gladush;Sergey S.Zhukov;Boris P.Gorshunov;Albert G.Nasibulin;Aleksey V.Arsenin;Valentyn S.Volkov;Maria G.Burdanova

作者机构：Center for Photonics and 2D MaterialsMoscow Institute of Physics and TechnologyDolgoprudny.Russia Skolkovo Institute of Science and TechnologyMoscowRussia Prokhorov General Physics Institute of the Russian Academy of SciencesMoscowRussia Laboratory of Advanced Functional MaterialsYerevan State UniversityYerevanArmenia Institute of Solid State Physics of the Russian Academy of SciencesChernogolovkaRussia. 

出 版 物：《Ultrafast Science》 (超快科学（英文）)

年 卷 期：2023年第3卷第6期

页      面：1-9页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：M.G.B.and M.I.P.acknowledge Russian Science Foundation(RSF)project no.21-79-10097(experimental OPTP measurements) Ministry of Science and Higher Education of the Russian Federation no.0714-2020-0002(anisotropy factor measurements for SWCNT films) Moreover,M.G.B.acknowledges RSF project no.22-72-10033(investigation of the stretchable modulators efficiency) B.P.G.and A.G.N.acknowledge RSF project no.21-72-20050(sample preparation) 

主　　题：strain excitation films 

摘      要：For terahertz wave applications,tunable and rapid modulation is highly *** studied by means of optical pump-terahertz probe spectroscopy,single-walled carbon nanotube(SWCNT)thin films demonstrated ultrafast carrier recombination lifetimes with a high relative change in the signal under optical excitation,making them promising candidates for high-speed ***,combination of SWCNT thin films and stretchable substrates facilitated studies of the SWCNT mechanical properties under strain and enabled the development of a new type of an optomechanical *** applying a certain strain to the SWCNT films,the effective sheet conductance and therefore modulation depth can be fine-tuned to optimize the designed *** exhibited a photoconductivity change of approximately 2 times of magnitude under the strain because of the structural modification in the SWCNT *** was used to control the terahertz signal with a modulation depth of around 100%without strain and 65%at a high strain operation of 40%.The sensitivity of modulators to beam polarization is also shown,which might also come in handy for the design of a stretchable *** results give a fundamental grounding for the design of high-sensitivity stretchable devices based on SWCNT films.