Spectroscopy of a borosilicate crown glass in the wavelength range of 0.2 µm–15 cm

Abstract We report on the experimental studies of interaction electromagnetic radiation with borosilicate crown glass K108 in ultrawide frequency range from 0.002 to 1500 THz. Four different types spectrometers are used measure reflectivity and/or transmittance spectra. Spectral dependences complex dielectric permittivity, refractive index and extinction coefficient extracted measured The optical properties microwave spectral (2–23 GHz) investigated for first time. There three bands anomalous dispersion curve real part permittivity. Each band corresponds an absorption band, which is clearly seen spectrum imaginary wide low-frequency attributed Boson peak. Two other examined represent sharp peaks associated Si–O–Si bending Si–O stretching vibration modes. results study can be useful development optics based glass.