Optical constants of electron-beam evaporated boron films in the 6.8-900 eV photon energy range.
The optical constants of electron-beam evaporated boron from 6.8 to 900 eV were calculated through transmittance measurements of boron thin films deposited onto carbon-coated microgrids or LiF substrates in ultrahigh-vacuum conditions. In the low-energy part of the spectrum the measurements were performed in situ on freshly deposited samples, whereas in the high-energy range the samples were exposed to the atmosphere before the measurements. The extinction coefficient was calculated directly from the transmittance data, and a Kramers-Kronig analysis that combined the current data with data from the literature was performed to determine the dispersive part of the index of refraction. Finally, two different sum-rule tests were performed that indicated the good consistency of the data.
Instituto de Física Aplicada-Consejo Superior de Investigaciones Científicas, C/Serrano 144, 28006 Madrid, Spain.
Mónica
M
Fernández-Perea
Juan I
JI
Larruquert
José A
JA
Aznárez
José A
JA
Méndez
Manuela
M
Vidal-Dasilva
Eric
E
Gullikson
Andy
A
Aquila
Regina
R
Soufli
J L G
JL
Fierro