I can't comment so here's an answer that's not really an answer but rather some debugging suggestions:
Remove all logic from the circuit for now (raspi, arduino, whatever). No need for programming if the hardware isn't working.
Connect the receiver and transmitter to a 3v3-5v supply. Connect your multimeter or voltmeter to the output line of the receiver.
Make sure that the receiver is giving off a low reading when not illuminated (your reading of .07 volt == low).
Proceed to place the receiver and transmitter as close as possible and check the voltage reading on your volt-/multimeter. It should rise significantly (typically to a voltage slightly lower than the supply).
If you don't get a rising voltage here, you got a hardware problem in the transmitter, receiver, connecting wires, your power supply or your multimeter. You can now start ruling out each component individually.
You might be able to test the receiver and transmitter using a digital video camera and an infrared remote control. If you own a TV and a smartphone/digicam, you should be good. It's not a sure-fire method but video cameras often don't filter out IR light properly so turn on the IR transmitter and look at it close-up through the view finder of your camera. You should see the light if it's working.
Likewise, you'd expect the voltage in the receiver's output line to change if it's directly facing a TV remote control while the buttons are being pressed. If none of this works, look at the remote control through the camera to verify that your camera doesn't filter out IR light and that your remote is working.
Still nothing? Hit up ebay and buy 10-20 new diodes/receivers for a couple of bucks :P