E. Stoykova et M. Nenchev, REFLECTION AND TRANSMISSION OF THE UNEQUAL MIRRORS INTERFERENCE WEDGE, Optical and quantum electronics, 28(2), 1996, pp. 155-167
Some interesting features of the interference wedge of thickness 5-200
mu m are found which characterize its reflection and transmission whe
n it is constructed of unequal-reflectivity mirrors. The analysis of t
he wedge's behaviour is made using equations derived by us for restric
ted laser beam illumination on the assumption of truncated Gaussian am
plitude distribution and uniform phase distribution. It is shown that
at resonant wavelengths the unequal-reflectivity mirrors interference
wedge has a property of optical asymmetry in reflection for both contr
aincidences and that the earlier-reported phenomenon of spectrally con
trolled resurgence of light outside the nonresonantly reflected beam i
ncreases drastically to reach at resonance 60-70% of the reflected pow
er. We ascertained that the wedge spectral selectivity is a function o
f the product of the reflectivities of its mirrors. Keeping one of the
m fixed and increasing the other, a higher wedge transmission may be o
btained, but for a constant value of their product a maximum in transm
ission is achieved at equal reflectivities. Some of the dependences ob
tained have been checked experimentally.