Accession Number : ADA157608


Title :   Thin Film Research. Volume 1


Descriptive Note : Final rept. 8 Jan 1981-31 Jul 1984


Corporate Author : ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER


Personal Author(s) : MacLeod, H A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a157608.pdf


Report Date : 30 May 1985


Pagination or Media Count : 417


Abstract : Optical thin films are critical components in a broad range of technologies, ranging from energy conversion to information storage. In response to the demand for increasingly specialized and durable coatings, enquiry into the basic nature of these coatings has intensified. Such efforts are necessary because assumptions that thin films were similar to nominally identical bulk materials have proven unreliable. For example, while most bulk materials show a high degree of isotropy, thin films display pronounced anisotropy. Another distinction between bulk and thin film materials is the lower density of the latter, with the resulting porosity. Both anisotropy and porosity often contribute to the unpredictable performance and durability of optical coatings. This report covers three years of fruitful research aimed at better understanding and modifying film microstructure in the direction of greater isotropy and density through novel deposition techniques. We have supported this effort with an array of analysis techniques and with a major effort in film growth simulation and in the theoretical description of anisotropic films.


Descriptors :   *ANISOTROPY , *FILMS , *MICROSTRUCTURE , *POROSITY , ARRAYS , BULK MATERIALS , COATINGS , CRITICALITY(GENERAL) , DATA STORAGE SYSTEMS , DEPOSITION , ENERGY CONVERSION , LOW DENSITY , METHODOLOGY , OPTICAL COATINGS , OPTICAL MATERIALS , RESPONSE , SIMULATION


Subject Categories : Physical Chemistry
      Crystallography


Distribution Statement : APPROVED FOR PUBLIC RELEASE