The working principle and schematic of the mapping setup (IMAGE)
Caption
a. After passing through the single-mode fiber and grating coupler, the probe light is coupled into the silicon microdisk via evanescent coupling from the Si waveguide. b. When a 420 nm nanosecond laser is focused onto the top surface of the microdisk, local refractive index changes (∆n₁ and ∆n₂ resulted from FCA and thermal effect, respectively) induce the shifting of the resonance frequencies. For a fixed probe wavelength, the shifts of resonances lead to two opposite changes of transmittance ∆T₁(x, y) and ∆T₂(x, y) that can be measured at the output port.
Credit
by Shuai Wang, Shuai Liu, Yilin Liu, Shumin Xiao, Zi Wang, Yubin Fan, Jiecai Han, Li Ge and Qinghai Song
Usage Restrictions
Credit must be given to the creator.
License
CC BY