Optical properties of organic microcavity based on porous silicon Bragg reflector

The construction of an organic microcavity with an organic light-emitting t hin film sandwiched between a porous silicon Bragg reflector and a silver f ilm is demonstrated. The peak widths of the PL spectra are greatly reduced from 83 nm to 4 nm as compared with those measured from non-cavity structur es. The off-resonant optical modes are highly depressed. As is always obser ved from an optical microcavity,the peak intensity is enhanced,and the peak position shows a blue shift with increasing exit angles.