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Flexible terahertz modulator based on coplanar-gate graphene field-effect transistor structure
- Source :
- Optics Letters. 41:816
- Publication Year :
- 2016
- Publisher :
- The Optical Society, 2016.
-
Abstract
- The terahertz (THz) modulators, as an essential component of the THz system, have been developed by many efforts until now. However, the development of flexible THz modulators is hindered due to the lack of flexible THz modulating materials. Herein, for the first time to the best of our knowledge, we demonstrated the feasibility of flexible THz modulators based on the coplanar-gate field-effect transistor (FET) structure of ion-gel/graphene/polyethylene terephthalate. The THz transmittance through this THz graphene modulator can be well controlled with a modulation depth up to 22% by tuning the carrier concentration of graphene via electrical gating. Furthermore, because of the integration of high flexibilities of graphene, ion-gel, and polyethylene terephthalate (PET), the proposed THz graphene modulator shows superior flexible performance, where the modulation properties can be maintained almost unchanged, not only under bending deformations, but also before and after bending 1000 times. In addition, due to the unique structure of ion-gel/graphene/PET, the flexible THz graphene modulator has a low insertion loss (1.2 dB). Therefore, this Letter is expected to be beneficial for the potential applications, ranging from the traditional compact THz system to a new flexible THz technology.
- Subjects :
- 010302 applied physics
Materials science
Transistors, Electronic
Graphene
Terahertz radiation
Transistor
Nanotechnology
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Atomic and Molecular Physics, and Optics
law.invention
Terahertz spectroscopy and technology
Amplitude modulation
Modulation
law
0103 physical sciences
Transmittance
Insertion loss
Graphite
0210 nano-technology
Terahertz Radiation
Mechanical Phenomena
Subjects
Details
- ISSN :
- 15394794 and 01469592
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- Optics Letters
- Accession number :
- edsair.doi.dedup.....7ed0c8c0c02e5e68271945c99611b3dd