Journal
AIP ADVANCES
Volume 7, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5001561
Keywords
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [NRF-2016R1D1A1B03935241, NRF-2017R1D1A1B03030669]
- Chonnam National University
- Research on Advanced Optical Science and Technology grant
- Ultrashort Quantum Beam Facility Program - GIST
- Ministry of Science & ICT (MSIT), Republic of Korea [GIST-04] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We demonstrate the conditions for optimal modulation efficiency of active terahertz modulators based on phenyl-C-61-butyric acid methyl ester (PCBM)-silicon hybrid structures. Highly efficient active control of the terahertz wave modulation was realized by controlling organic film thickness, annealing temperature, and laser excitation wavelength. Under the optimal conditions, the modulation efficiency reached nearly 100%. Charge distributions measured with a near-field scanning microwave microscanning technique corroborated the fact that the increase of photo-excited carriers due to the PCBM-silicon hybrid structure enables the enhancement of active modulation efficiency. (C) 2017 Author(s).
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