Proceedings of the Society of Photo-optical Instrumentation Engineers SPIE Photonics West, OPTO 2014, Conference 8981-Physics, Simulation, and Photonic Engineering of Photovoltaic Devices III SPIE Photonics West, OPTO 2014, Conference 8981-Physics, Simulation, and Photonic Engineering of Photovoltaic Devices III, 2014, San Francisco, CA, United States. ⟨10.1117/12.2042882⟩