EN
Wire patterns (80-1000 nm) of molecular beam epitaxy grown Cd_{0.2}Zn_{0.8}Se/ZnSe quantum well were fabricated by a CH_{4}/H_{2} reactive ion etching technique. Photoluminescence emission shows with decreasing lateral size a broadening of line shape and a spectral red shift. Calculations for the change of the band gap due to strain relaxation show that this shift of the photoluminescence emission for narrow Cd_{0.2}Zn_{0.8}Se/ZnSe structures (lattice mismatch of 1.34%) can be explained by a partial elastic strain relaxation of the biaxially compressively strained Cd_{0.2}Zn_{0.8}Se quantum well after the patterning process.