Dynamically Tuning the Density of Mode in a Photonic Crystal With Double Defects

The density of mode in acoustically modulated one-dimensional photonic crystal with two defects embedded has been calculated using the Wigner time phase approach. The acoustic wave redistributes the periodicity and the refractive index of each layer in the unit cell of photonic crystal. It is observed that there are two peaks in the density of mode plots whose intensity as well as frequency domain are dynamically tuned as these peaks are affected by the fractional change in the time period of acoustic waves. In case of synchronous modulation of density of mode, coupled and uncoupled defect modes are observed, which might be useful in realizing future optoelectronic devices.