Figure 2
From: Polarization domain wall pulses in a microfiber-based topological insulator fiber laser
Characterization and measurement.
(a) Measured XRD pattern of Bi2Te3. (b) Low-magnification SEM image of Bi2Te3 nanosheets. (c) High-magnification SEM image of Bi2Te3 nanosheets. (d) Microscope image of microfiber-based TI SA. (e) Microscope image of the evanescent field of the microfiber-based TI observed using visible light.
