Optical spectra demonstrating photonic band gap effects
- Optical reflectance spectrum reveals peaks at specific wavelengths
- The peak reflectivity is not very high mostly due to scattering
- Peak positions scale linearly with the template sphere diameter
- The position of the peak remains pretty robust for samples of the same batch having same lattice parameter
- Specular reflectance peak shows a shift towards shorter wavelengths as a function of incidence angle