the infrared from Proxima Centauri (a red dwarf) would work to slow it down, but it would take time, and with wings this big the odds of damage from encountering some rocks is pretty great.
In the laser-boosted scenario, as given a number of years ago (I read it in the 1990s I think) the brakes would be applied by a leading craft. The probe would be bringing up the rear. As the solar energy became strong enough (assuming everything in working order), the laser in the leading craft would acquire the probe craft and apply the needed deceleration. The leading laser craft would just keep on sailing, finally crashing into a muslim wedding in a baby food factory built hundreds of years in the future, construction made possible by currently unimagined or unavailable transportation technology, along with witless 7th century superstition.
Thanks for attempting a real response this time, but after the laser was turned on, the front spacecraft would accelerate away from the following spacecraft. The laser’s ability to slow down the following spacecraft would continually diminish over time.