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Several studies are conducted to explain the different light emission properties of the planar source present in the different multilayer structures with different photonic crystal patterns. The working of the different optoelectronic devices based on these patterns is also analyzed.

A study was conducted to investigate the property of the localized mixed acoustic modes lying in the interior minigap in structural defect superlattices grown away from the cubic axis of bulk materials. The result reveals the localized mixed modes always appear in pairs inside each interior minigap for certain structural parameters.

The photonic band structures of two-dimensional photonic crystals containing lattices with different symmetries and scatterers of various shapes, orientations, and sizes are studied numerically. The largest absolute photonic band gap is achieved by selecting a scatterer of the same symmetry. The band gap can be further maximized by adjusting the orientation and size of the scatterers.