Analysis of photonic band gap shifting by single-exposure holographic design

摘要

Three-dimensional periodical microstructures can be fabricated by the interference of four noncoplanar beams. Generally the basis vector choice for a certain lattice is not unique and the same lattice structure can be formed with different recording geometries. It shows that, for certain special cases, the lattice constant can be tuned by proper single-exposure holographic design without distortion of the lattice element and then one can shift the photonic band gap to a different frequency range. In addition, a simple optical setup for fabricating body-centred cubic lattice with a large band gap is proposed.