Need more information about the diode.
For example: Diode can be approximate as a small voltage (Vd=0.8V?) and a small resistor (25?/I(mA) ) when current flow in the forward direction.
When voltage is applied to a diode, it can be simulated as a very large resistor. What is the value for the resistance when the voltage is reversed?
This is similar to a RLC circuit, but with different R and a voltage source when current flow in different direction.