Lol.. sorry.. was busy photographing the last few days... Yes - you've hit the nail on the head.. they are infrared photos.. You can either get a modified DSLR made infrared... or just use photoshop to do so like this:
1.) Make a duplicate of the background layer (in layers palette drag "background" over the new layer icon at the bottom of the palette next to the trash can)

2.) Make sure this new duplicate layer called "background copy" is selected (highlighted in blue)

3.) Make a new adjustment layer of type: Channel Mixer (click and hold the half black/white circle at the bottom of the layers palette and select "Channel Mixer" from the menu that pops up.)

4.) A menu box pops up for adjustment of the Channel Mixer.

5.) Check "Monochrome" at the bottom. (Leave it unchecked for a bizarre color effect.)

6.) Set R = + 100%, G = + 200% and B = minus 200% ( - 200%)

7.) set constant as needed for the correct brightness, usually about minus 28%.

8.) Click OK

optional:

9.) Add foggy blur: create and blur another duplicate layer and mix it to the percentage you prefer

10.) Add grain to taste (Filter > Noise > Add Noise)