Queen trap in Petrov's D.

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Kleenex4u

So, many player know the queen trap in this defence.  I had a black opponent follow it for the most part, and we have ended up with his knight on e4 and mine on e5, with pawns captured.  after I moved my quen to e2, he moved his pawn to d5 to protect his Knight.   
I have seen that the trap is still possible at this point, but I forget the line. Do i try to remove that pawn, as it is a great weak point now, or is there another move?  

Kleenex4u

exactly like what you showed. He did D5, how does he lose a pawn?