Fig. 1. Metal-DBR-metal structure containing graphene

Fig. 2. Absorption spectra of M-DBR-M without graphene and M-DBR-M with graphene

Fig. 3. Electric field corresponding to M-DBR-M without graphene at different wavelengths. (a) 876.5 nm; (b) 957.5 nm

Fig. 4. Electric field of M-DBR-M with graphene at different wavelengths. (a) 893.5 nm; (b) 977.0 nm

Fig. 5. Variation curves of two OTS intrinsic wavelengths with driving voltage of M-DBR-M with graphene. (a) OTS 1; (b) OTS 2

Fig. 6. Absorption spectra at different cycles before and after applying voltage. (a) Before application; (b) after application

Fig. 7. Variation curves of two OTS with DBR cycle number in different conditions. (a) OTS 1 intrinsic wavelength and tuning range; (b) OTS 2 intrinsic wavelength and tuning range; (c) OTS 1 absorptivity; (d) OTS 2 absorptivity

Fig. 8. Variation curves of two OTS with thickness of metal layer M 1 in dfferent conditions. (a) OTS 1 intrinsic wavelength and tuning range; (b) OTS 2 intrinsic wavelength and tuning range; (c) OTS 1 absorptivity; (d) OTS 2 absorptivity

Fig. 9. Variation curves of two OTS with thickness of metal layer M 2 in different conditions. (a) OTS 1 intrinsic wavelength and tuning range; (b) OTS 2 intrinsic wavelength and tuning range; (c) OTS 1 absorptivity; (d) OTS 2 absorptivity