Method for non-damaging charge injection and system thereof

A system for injecting charge, the system comprising:

• a first material on a second material with an interface between the first and second materials, wherein the first and second materials are dissimilar insulators;
• a charge source positioned to inject charge into the first material to trap charge at an interface between the first and second materials, wherein a thickness of the first material is greater than a penetration depth of the injected charge in the first material;
• a conductor on the second material;
• and
• a power source that applies an accelerating potential above 3800 eV across the conductor and the charge source for the injected charge, wherein the charge source is an electron gun.