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Ultrafast Optomechanical Terahertz Modulators Based on Stretchable Carbon Nanotube Thin Films
- 超快科学（英文） 2023年3卷第6期
- Affiliations：
a Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny,Russia. b Skolkovo Institute of Science and Technology, Moscow, Russia. c Prokhorov General PhysicsInstitute of the Russian Academy of Sciences, Moscow, Russia. d Laboratory of Advanced FunctionalMaterials, Yerevan State University, Yerevan, Armenia. e Institute of Solid State Physics of the RussianAcademy of Sciences, Chernogolovka,Russia
- Author bio：
- Funds：
DOI：10.34133/ultrafastscience.0021
中图分类号：纸质出版日期：2023，
- Accepted：
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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. 2023: Ultrafast Optomechanical Terahertz Modulators Based on Stretchable Carbon Nanotube Thin Films. 超快科学, Vol 3(6).
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. 2023: Ultrafast Optomechanical Terahertz Modulators Based on Stretchable Carbon Nanotube Thin Films. Ultrafast Science, Vol 3(6).
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. 2023: Ultrafast Optomechanical Terahertz Modulators Based on Stretchable Carbon Nanotube Thin Films. 超快科学, Vol 3(6). DOI： 10.34133/ultrafastscience.0021
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. 2023: Ultrafast Optomechanical Terahertz Modulators Based on Stretchable Carbon Nanotube Thin Films. Ultrafast Science, Vol 3(6). DOI： 10.34133/ultrafastscience.0021
摘要
For terahertz wave applications
tunable and rapid modulation is highly required. When 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 modulators. Here
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 modulator. By applying a certain strain to the SWCNT films
the effective sheet conductance and therefore modulation depth can be fine-tuned to optimize the designed modulator. Modulators exhibited a photoconductivity change of approximately 2 times of magnitude under the strain because of the structural modification in the SWCNT network. Stretching 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 polarizer. Our results give a fundamental grounding for the design of high-sensitivity stretchable devices based on SWCNT films.
Abstract
For terahertz wave applications
tunable and rapid modulation is highly required. When 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 modulators. Here
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 modulator. By applying a certain strain to the SWCNT films
the effective sheet conductance and therefore modulation depth can be fine-tuned to optimize the designed modulator. Modulators exhibited a photoconductivity change of approximately 2 times of magnitude under the strain because of the structural modification in the SWCNT network. Stretching 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 polarizer. Our results give a fundamental grounding for the design of high-sensitivity stretchable devices based on SWCNT films.
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