Fig. 3: Controllability for the NDT phenomenon.

a OM images of the PG-NDT device under laser-off and laser-on conditions. b ID−VG and Gm−VG characteristic curves showing the optoelectronic NDT (O-NDT) phenomenon. c ID−VG characteristic curves showing the O-NDT phenomenon under different laser power conditions (top) and energy band diagrams at negative VG under different laser power conditions (bottom). d ID−VG characteristic curves showing the O-NDT phenomenon under different laser wavelength conditions (top) and Energy band diagrams for negative VG under different laser wavelength conditions (bottom).