Photonic crystals on InP membranes: Waveguiding and light emission

We fabricated membranes which generally include InAsP/InP quantum wells that emit light around 1.5 /spl mu/m. Depending on the structure studied, it can be used either as an efficient optical gain material (well suited for light emission), or as an active probe to insert light into PC structures (to study optical waveguides). Characterisation is performed by optical pumping the active layer and by analysing the photoluminescence (PL) signal emitted out of plane from the structures.