1- Channel mixer adjustment:

  • Create a Channel Mixer adjustment layer.
  • From the Preset dropdown, select Black & White Infrared (RGB).
  • Leave the Green value as it is (200%) as this creates most of the effect, but play around with the Red and Blue channels to get something that looks good.
  • Here I set the Blue channel to 0% and the Red channel to -60%.

That’s it! That’s the only step needed for this particular case.