Fig. 1. Schematic diagram of multibeam interferometry

Fig. 2. Comparison of original interferograms and threshold processed x-y plane interferograms. (a),(c) Sublattice interferograms; (b),(d) SPMSs interferograms for γ=6.03°

Fig. 3. Models of SPMSs and HPMSs and their local modes and band structures. (a),(b) HPMSs for γ=4.41°and SPMSs for γ=4.98°; (c)-(f) SPMSs low and high-frequency localized modes and band structure; (g),(h) HPMSs local modes and band structure

Fig. 4. TE band structure of flims of square and hexagonal air-hole lattice photonic crystals. (a),(c) Standard band structure; (b),(d) localized magnification of band structure

Fig. 5. Diagram of brief experimental setup for excitation of localized modes of SPMSs

Fig. 6. Low-frequency local-mode x-y and x-z electric field intensity distributions for SPMSs with different air-hole radius r. (a),(e) 105 nm; (b),(f) 120 nm; (c),(g) 135 nm; (d),(h) 150 nm

Fig. 7. Irregular local modes in vicinity of M_m point for small and optimal values of r. (a),(b) 120 nm; (c),(d) 127.5 nm

Fig. 8. Band structures of two sets of localized modes of SPMSs with different air-hole radius r. (a) 120 nm; (b) 127.5 nm; (c) 135 nm;(d) 150 nm

Fig. 9. Low-frequency local-mode x-y and x-z electric field intensity distributions of SPMSs with different flim thicknesses h. (a),(e) 200 nm; (b),(f) 500 nm; (c),(g) 700 nm; (d),(h) 800 nm

Fig. 10. Band structures corresponding to low-frequency local modes of SPMSs with different flim thicknesses h. (a) 200 nm;(b) 500 nm; (c) 700 nm; (d) 800 nm