Abstract
The surface of a polycrystalline germanium film, vacuum-deposited onto a heated substrate in a narrow range of temperatures, takes on a regular structure exhibiting optical interference effects whose nature is quite sensitive to the angle at which the film is deposited. For all films deposited between 550° and 620°C, Fraunhofer diffraction effects are observed which are independent of crystalline texture. In the case of perpendicular deposition, the diffraction is nearly isotropic about the normal to the film, while in the case of deposition at an acute angle, the diffraction effects are nonisotropic and the observed optical behavior is analogous to that observed with blazed gratings; electron-microscope observations confirm these particular surfaces to be “blazed” in character. The “blue–grey” character of germanium films and the “blue haze” observed on other surfaces is explained on the basis of these results.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
