NEAR-FIELD EFFECT INVOLVING PHOTONIC BANDS

The relationship between the excitation of photonic bands and the enha ncement of local-field intensity is discussed. Using the time reversal symmetry, it is shown that the local held induced by a plane-wave lig ht at a point near the arrayed dielectrics is essentially the same as the optical signal of a light emitted from that point and detected by a remote recorder. For a periodic monolayer of dielectric spheres, a v ariety of the frequency-and position-dependences of the local field ar e presented numerically and their origins are discussed in relation to the optical near-field microscopy (SNOM) signals. (C) 1997 Elsevier S cience S.A.