Patent ID: 7512170

Claim:
A method of forming a reflective mirror within a substrate, said method comprising the acts of: providing a substrate having a melting temperature; forming a plurality of cylindrical holes within said substrate, each of said plurality of cylindrical holes being defined by a radius R=Î»/4 [(2k+1)/n+(2m+1)] (1/8.89), wherein Î» is a wavelength for which the reflectivity of said reflective mirror is maximum, n is the refraction index of said substrate, and k and m are real integers, and wherein any two adjacent cylindrical holes are spaced apart by a distance Î”N 2 =27.83 R 3 /(2m+1)Î»/4; and subjecting said substrate to a temperature lower than the melting temperature of said substrate to form a plurality of empty-spaced patterns beneath a surface of and within said substrate, said empty-spaced patterns being sequentially positioned along an optical path of said substrate.