  One-dimensional Thue-Morse (ThMo) lattices are examples of self-similar
structures that exhibit bandgap phenomena. ThMo multilayers may also possess
fractal photonic bandgaps that give rise to large omnidirectional reflectance
and light emission enhancement effects. Two-dimensional (2D) ThMo aperiodic
quasicrystals possess interesting properties for photonic applications too.
Here we demonstrate the experimental fabrication of large area 2D ThMo lattices
into polymeric substrates at nanometer scale by electron beam lithography
(EBL). Far field diffraction patterns of the experimental Thue-Morse structures
have been measured and compared with the calculated theoretical Fourier
spectra. Scanning electron microscopy and far field diffraction are used to
characterize the experimental structures.
