One-dimensional photonic crystal structures for multiple channeled filtering and polarization selective filtering in the terahertz (THz) range are studied theoretically.The design of aperiodic photonic quantum-well (APQW) structures for multiple channeled filtering and different polarization filtering at arbitrary preassigned frequencies are achieved by using the simulated annealing algorithm with a special merit function.The parameters of these filters can be expediently controlled and the transmission characters are polarization dependent.Numerical simulations show that the designed APQWs can meet the desired specification well.
