The optical modes of lasing photonic lattices incorporating alternating-shear strain were analyzed using a background-resonator mode expansion model. The model correctly explains the observed locking of the photon mode near fields to square or hexagonal-like lattice patterns for subcritical strain values, as well as the abrupt switching between the two mode patterns. Control of the optical mode switching point by adjusting the lattice reflectivity is proposed and analyzed.
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Fishman et al. (1999) studied this question.
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