The multilayer systems Teflon-Au-Telfon-air and Teflon-Ni-phthalocyanine-Teflon-air are investigated by optical reflectometry. Both systems exhibit long-range surface exciton resonance, manifested as a sharp absorption band in the reflectance curve for TM polarisation, above the critical angle for total internal reflection. Dependence of the resonance on the properties of each of the layered phases is discussed on the basis of Fresnel’s multireflection theory together with potential applications in optical sensors.