An ultrafast and low-power slow light tuning mechanism for compact aperture-coupled disk resonators
Wang Bo-Yun1, †, Zhu Yue-Hong1, Zhang Jing1, Zeng Qing-Dong1, Du Jun1, Wang Tao2, Yu Hua-Qing1, ‡
       

Transmitted spectra (a1)–(e1), transmitted phase shift responses and group indices (a2)–(e2) under various pump light intensities when disk cavity 1 is overlaid by a graphene layer with a thickness of 0.5 nm. The black dots stand for the group indices of the PIT peaks with values of 53.2, 38.8, 27.5, 19.8, and 15.1.