I believe that's what's happening in this case. From https://www.livescience.com/61763-single-atom-ion-trap-photo.html https://www.livescience.com/61763-single

I believe that's what's happening in this case. From https://www.livescience.com/61763-single-atom-ion-trap-photo.html https://www.livescience.com/61763-single-atom-ion-trap-photo... "This glow would be barely perceptible with the naked eye but becomes apparent with a little camera manipulation."