Title :
Ge/SiO/sub 2/ laminated optical polarizer for the wavelength region 0.6-1 μm
Author :
Kawakami, Shojiro ; Ma, Deshan
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
fDate :
7/1/1991 12:00:00 AM
Abstract :
A report is presented on laminated polarizers (LAMIPOLs) suitable for short wavelengths of light (λ < 1 μm). This new device consists of periodic alternative layers of ultrathin Ge (e.g., <8 nm thick) and SiO/sub 2/ (e.g., <1 μm thick). The quality factor of the new laminated polarizer, defined by R= alpha /sub TE// alpha /sub TM/, is in excess of 200 at λ = 0.8 μm and is a decreasing function of the wavelength lambda . This is in remarkable contrast to the fact that the quality factor for an Al/SiO/sub 2/ LAMIPOL is an increasing function of λ.
Keywords :
elemental semiconductors; germanium; laminates; optical films; optical polarisers; silicon compounds; 0.6 to 1 micron; Ge-SiO/sub 2/; Ge/SiO/sub 2/ laminated optical polarizer; LAMIPOL; periodic alternative layers; quality factor; semiconductor; short wavelengths; wavelength dependence; Admittance; Aluminum; Amorphous materials; Electromagnetic fields; Germanium; Optical films; Optical polarization; Semiconductor materials; Silicon compounds;
Journal_Title :
Photonics Technology Letters, IEEE
