Abstract
We demonstrated photonic band characterization in photonic crystals (PhCs) based on InGaN/GaN nanocolumn (NC) arrays fabricated by Ti-mask selective area growth. Triangular and honeycomb latticed NCs with approximately the same diameter and closest distance were successfully fabricated. To effectively observe the photonic bands, we designed an angle-resolved micro-photoluminescence measurement system. The photonic bands in the honeycomb lattice were at longer wavelengths compared with those in the triangular lattice, indicating that, for the honeycomb lattice, narrower NCs were available to realize PhC effects in the long-wavelength region. Therefore, narrow honeycomb lattices with large nanocrystalline and PhC effects are suitable for long-wavelength emission.
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