| 학회 | 한국재료학회 |
| 학술대회 | 2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 | 23권 1호 |
| 발표분야 | 7. 플라즈모닉 소재의 응용(Applications of Plasmonic Materials) |
| 제목 | Plasmo-excitonics based on 2D van der Waals semiconductors |
| 초록 | The recent challenges for improving the operation speed of nanoelectronics motivate researches on manipulating light in on-chip integrated circuits. Hybrid plasmonic waveguides with low-dimensional semiconductors, including quantum dots (QDs) and quantum wells (QWs), are a promising platform for realizing sub-diffraction limited optical components. Two-dimensional (2D) transition metal dichalcogenides (TMDs) have been recently spotlighted owing to tightly bound excitons at room temperature, electrical-optical tunability of excitons [1], strong light–matter and exciton–plasmon interactions [2, 3], available top-down wafer-scale integration, and band-gap tunability. Here, we demonstrate the crucial optical components for nanophotonic circuits using plasmo-excitonics. Principal functionalities for on-chip optical communications were realized using the reconfigurable exciton-plasmon interconversion and efficient exciton flux modulation of TMDs in various architectures of plasmonic-TMD hybrids at room temperature. By varying device configurations for each operation purpose, three active components for optical communications are realized; field-effect exciton transistors with a channel length of ~32 μm, field-effect exciton multiplexers transmitting multiple signals through a single NW, and electrical detectors of propagating plasmons with a high On/Off ratio of ~ 190. Our demonstrations of the reconfigurable exciton-plasmon interconversions in various device architectures pave a way to realize various optical components for nanophotonic integrated circuits having advantages of adaptability in wavelength selection and scalability [4]. References [1] H. S. Lee* et al., Phys. Rev. B: Rapid Communications 93, 140409 (2016). [2] H. S. Lee et al., Adv. Opt. Mater. 3, 943(2015). [3] H. S. Lee* et al., Phys. Rev. Lett. 115, 226801(2015). [4] H. S. Lee* et al., Nat. Commun. 7, 13663 (2016). |
| 저자 | 이현석1, Dinh Hoa Luong2, 김민수1, 진영조2, 김현1, 윤석준2, 이영희1 |
| 소속 | 1나노구조물리연구단(CINAP), 2기초과학(연) |
| 키워드 | plasmonics; excitonics; plasmo-excitonics; 2d van der Waals semiconductors; nanophotonics; excitons; transition metal dichalcogenides |
