  We suggest a method for trapping photons in quasi one-dimensional waveguide
or coupled-resonator lattices, which is based on an optical analogue of the
Aharonov-Bohm cages for charged particles. Light trapping results from a
destructive interference of Aharonov-Bohm type induced by a synthetic magnetic
field, which is realized by periodic modulation of the waveguide/resonator
propagation constants/resonances.
