Crack-free highly reflective AlInN/AlGaN Bragg mirrors for UV applications.

Authors :: Feltin, E.
Carlin, J.-F.
Dorsaz, J.
Christmann, G.
Butté, R.
Laügt, M.
Ilegems, M.
Grandjean, N.
Source :: Applied Physics Letters; 1/30/2006, Vol. 88 Issue 5, p051108, 3p, 2 Black and White Photographs, 2 Graphs
Publication Year :: 2006
Abstract: We report the growth of highly reflective distributed Bragg reflectors (DBRs) in the UV region using the Al<subscript>0.85</subscript>In<subscript>0.15</subscript>N/Al<subscript>0.2</subscript>Ga<subscript>0.8</subscript>N lattice-matched system. The DBRs were deposited on nearly strain-free Al<subscript>0.2</subscript>Ga<subscript>0.8</subscript>N templates to avoid strain-induced structural degradations. The appearance of cracks was then completely suppressed. The DBRs exhibit a reflectivity higher than 99% at a wavelength as short as ∼340 nm and a stop band width of 215 meV (20 nm). [ABSTRACT FROM AUTHOR]