Investigation Of Optical Properties On Ag-doped Nanorods Array Polarizing Glass And Its Fabrication

This work was supported by the University Scientific Research Foundation of Jiangsu Province under the project number 12KJA480001.As an important compact device, optical polarizing glass shows excellent polarization properties, large acceptance angle and high heat resistance. It can be widely used in most application including optoelectronic devices, integrated photonics devices, new optical display and optical communication, et al. The main research in this thesis concerns on the following:Dipole theory was well used to explain the polarization transmission as an incident light passes through an optical polarized glass with silver particles distributed inside. The model of periodically distributed ellipsoid silver nanorods inside the transparent Ag-doped glass was designed and analyzed by the finite element numerical method. The polarization outputs were studied and calculated in detail under different work wavelength and different design parameters, such as length diameter ratio, duty cycle and nanorods sizes. The output shows good polarization and high extinction ratio more than 30 d B under wavelengths from 450~550 nm, 550~750 nm, 700~1100 nm, 1100~1500 nm and 1000~2500 nm. A polarization transmission more than 90% and an extinction ratio more than 50 d B was obtained in a bandwidth of 100 nm from 740 nm to 840 nm. In addition, a polarizing glass can be achieved under UV light exposure with volume silver nanorods grating taken inside. In our calculations, the polarization transmission is more than 80% with extinction ratio more than 30 d B within the whole infrared wavelength 700~2500 nm. Especially, in the wavelength from 1000~2500 nm, the transmission is over 90% with the extinction ratio over 40 d B. Experimentally, optical microcrystal polarizing glass was studied and fabricated. Nucleation and crystallization growth of Ag particles in the glass have been investigated and analyzed by means of Differential Thermal Analysis(DTA), X-ray Diffraction(XRD) and Transmission Electron Microscope(TEM). The results show that Ag absorption peak and crystal particles occur. Extinction ratios of 14 d B, 12 d B and 4.3 d B and transmission of 37.7%, 45.6% and 45.7% were measured and obtained in the corresponding work wavelength at 405 nm, 450 nm and 632 nm.