Louis de Broglie created "the neutrino theory of light." Picture shows scheme of formation of photons (figure is from the book "Electromagnetic Gravity" in my profile) . Photon has two neutrinos (the left screw photons) or of two antineutrinos (the right screw photons or "anti-photon").
They attract each other by vortex interaction. Neutrinos are constantly changing places. They are changing their size, and passing through each other on the principle of "game of vortex rings".
You may see animation on site http://gravity.spb.ru When interacting with matter, photons transmit their momentum.
Look at the third option in the figure. A Black Photon is a compound of a neutrino with an antineutrino. This particle is its own antiparticle. The connection neutrino with antineutrino we cannot observe, although it may exist. Moments of ring rotations cancel each other (spin=0). Such photons can only have its own frequency. However, if the photon cannot pass its
momentum to recording device.Is it not available observation and is it impossible to detect?