Journal
NANO LETTERS
Volume 17, Issue 8, Pages 4689-4697Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b01344
Keywords
Gold nanorods; plasmons; two-dimensional atomic crystals; strong coupling active control
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Funding
- National Natural Science Foundation of China [51290271, 11474364]
- National Key Basic Research Program of China [2013CB933601, 2013YQ12034506]
- Guangdong Natural Science Funds for Distinguished Young Scholars [2014A030306017]
- Pearl River S&T Nova Program of Guangzhou [201610010084]
- Guangdong Special Support Program [201428004]
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Strong light-matter coupling manifested by Rabi splitting has attracted tremendous attention due to its fundamental importance in cavity quantum-electrodynamics research and great potentials in quantum information applications. A prerequisite for practical applications of the strong coupling in future optoelectronic devices is an all-solid-state system exhibiting room-temperature Rabi splitting with active control. Here we realized such a system in, heterostructure consisted of monolayer WS2 and an individual plasmonic gold nanorod. By taking advantages of the small mode volume of the nanorod and large transition dipole moment of the WS2 exciton, giant Rabi splitting energies of 91-133 meV can be achieved at ambient conditions, which only involve a small number of excitons. The strong light-matter coupling can be dynamically tuned either by electrostatic gating or temperature scanning. These findings can pave the way toward active nanophotonic devices operating at room temperature.
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