Room-temperature strong coupling between dipolar plasmon resonance in single gold nanorod and two-dimensional excitons in monolayer WSe<sub>2</sub><xref rid="cpb_27_9_096101fn1" ref-type="fn">*</xref><fn id="cpb_27_9_096101fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 51290271 and 11474364), the National Basic Research Program of China (Grant Nos. 2013CB933601 and 2013YQ12034506), the Natural Science Funds for Distinguished Young Scholars of Guangdong Province, China (Grant No. 2014A030306017), the Pearl River S & T Nova Program of Guangzhou, China (Grant No. 201610010084), and the Guangdong Special Support Program, China.</p></fn>

Room-temperature strong coupling between dipolar plasmon resonance in single gold nanorod and two-dimensional excitons in monolayer WSe₂**

Project supported by the National Natural Science Foundation of China (Grant Nos. 51290271 and 11474364), the National Basic Research Program of China (Grant Nos. 2013CB933601 and 2013YQ12034506), the Natural Science Funds for Distinguished Young Scholars of Guangdong Province, China (Grant No. 2014A030306017), the Pearl River S & T Nova Program of Guangzhou, China (Grant No. 201610010084), and the Guangdong Special Support Program, China.

Wen Jinxiu^{1, 4}, Wang Hao^{1, 3}, Chen Huanjun^{1, 2, †}, Deng Shaozhi^{1, 2, ‡}, Xu Ningsheng^{1, 2}

Strong coupling of the gold nanorod-WSe₂ heterostructures. (a) Resonance peaks as a function of the detuning energies between the LPM resonance and exciton transition. The red and green dots are extracted peaks from experimental measurements. The black solid lines are fitting results according to the coupled harmonic oscillator model, which demonstrate the anticrossing behavior. The horizontal dashed line indicates the exciton transition energy, while the diagonal one stands for the dispersion of the LPM resonances. (b) Exciton and plasmon fractions of the upper and lower branches of the heterostructures.