Table 1 Resistance values after exposure with a 405 nm laser diode (see Fig. 6).

From: Using persistent photoconductivity to write a low-resistance path in SrTiO3

Exposure Step Resistance between 1 and 2 Resistance between 3 and 4
Before light exposure 1.01 MΩ 1.77 MΩ
Expose contact # 2 0.61 MΩ 1.73 MΩ
Expose contact # 1 2.31 KΩ 1.72 MΩ
Draw path from 1 to 2 0.59 KΩ 1.40 MΩ
1 Day Later 0.97 KΩ 1.62 MΩ
5 Days Later 1.40 KΩ 1.72 MΩ