It is shown that the Bruggeman theory leads to a continuous absorption spectrum instead of the well-known single resonance of the Maxwell-Garnett theory. The applicability of both theories is discussed.

Optical absorption of small Ag clusters deposited on a fused quartz ATR prism kept at 30 and 300 K in a UHV chamber has been measured. It was found that, when clusters become smaller due to the growth on a cold substrate, plasma resonance absorption of free electrons disappears and the change in...

We have determined optical constants of (GaAs)N(AlAs)N ultrathin-layered superlattices (SL) with N = 2−20 prepared by MBE and compared with the theoretical calculations of Kamimura and Nakayama [Comments Condens. Matter Phys. 13 (1987) 143]. We used spectroscopic ellipsometry for λ =...