Optimization of pumping geometry of photonic crystal surface emitting lasers

It is typical to manufacture Photonic Crystal Surface Emitting Laser (PCSEL) devices with contact area smaller than the Photonic Crystal (PC) defined area to maximize Power Conversion Efficiency (PCE). Here we simulate PCSELs with unpumped PC boundary regions. We note that on increasing the size of the unpumped PC perimeter that total parasitic loss (α_i + α_//) does not reduce to that of αi alone. In this case the internal loss is a function of QW number, PCSEL-gain peak detuning, and pumped and un-pumped size as compared to the scattering coefficients. For intermediate cases, we determine the optimal PC matrix size for a given contact size, PC scattering coefficients, and QW number, and predict the modified value for the internal loss, including self-absorption (κ_ab).