In a particular tunnel injection laser an electric field in the insulator of 4 × 104 V/m produces a current density of 1500 A/cm2. If the thickness of the insulator is reduced by a factor of 1 / 2, by...

In a particular tunnel injection laser an electric field in the insulator of 4 ×

104 V/m produces a current density of 1500 A/cm2. If the thickness of the

insulator is reduced by a factor of 1

/

2, by what factor will the current density

be increased?