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We show assembly of functional and reconfigurable three-dimensional photonic crystals aided by opto-thermal effects due to localized optical heating of a thin gold film on a glass substrate. The optical stop bands of the photonic crystals are probed using Fourier plane imaging and angle resolved spectroscopy of locally excited dye molecules present in the solution. Additionally, dark field scattering spectroscopy indicates the structural colors of the assembled structures and changes with the lattice constants. The results have direct implications for low power manipulation and assembly of functional photonic structures.
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