Explicit equations are presented for the refractive indices of all-dielectric multilayers that reflect at a longer wavelength and transmit over a broad range of shorter wavelengths. Equations are given for the refractive indices of the layers of a simulated rugate reflector.
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F is the lowest-order number suppressed stop band. The a and the b constants appear in approximations (1) and (2), respectively. OT is the optical thickness (in waves at λ0) of A, x, y, z, or B such that teh first-order stop band is centered at λ0. The Eq(s). columns cites teh approximations and equations for the refractive indices of the x, y, or z layers.
Tables (2)
Table 1
Maximum Reflectance in Stop Bands of Orders 1 and 2, as well as the Designs of the Multilayer Heat Reflectors whose R(λ) Curves Appear in Figs. 2
–5a
F is the lowest-order number suppressed stop band. The a and the b constants appear in approximations (1) and (2), respectively. OT is the optical thickness (in waves at λ0) of A, x, y, z, or B such that teh first-order stop band is centered at λ0. The Eq(s). columns cites teh approximations and equations for the refractive indices of the x, y, or z layers.