Controlled emission from dye saturated single and coupled microcavities

Modified photoluminescence is demonstrated from the dye saturated porous silicon based single and coupled microcavities. When photonic cavity mode is weakly coupled to the emission states of the dye, photoluminescence line narrowing and intensity enhancement have been observed. Our experimental work and transfer matrix simulations and cavity modelling convincingly explain the tunability and optical field confinement within the microcavity. We also show that the photoluminescence enhancement is due to one-dimensional microcavity effect. These optically active hybrid materials from inexpensive fabrication may become an important consideration for many photonic applications.

Research highlights▶ We demonstrate modified emission from dye saturated porous silicon microcavities. ▶ Achieved tunable, narrow and enhanced emission from both single and coupled cavities. ▶ Modified emission is from weak coupling of dye emitting states and cavity modes. ▶ Experimental results are successfully supported by transfer-matrix simulations. ▶ Optically active hybrids from low-cost fabrication impart many photonic applications.