First-principles method for high-$Q$ photonic crystal cavity mode   calculations
  We present a first-principles method to compute radiation properties of ultra-high quality factor photonic crystal cavities. Our Frequency-domain Approach for Radiation (FAR) can compute the far-field radiation pattern and quality factor of cavity modes $\sim 100$ times more rapidly than conventional finite-difference time domain calculations. It also provides a simple rule for engineering the cavity's far-field radiation pattern. 
Sahand Mahmoodian, J. E. Sipe, Christopher G. Poulton, Kokou B.   Dossou, Lindsay C. Botten, Ross C. McPhedran, C. Martijn d...
physics.optics