Optical Absorption Enhancement in Freestanding GaAs Thin Film Nanopyramid Arrays (pages 1254–1260)
Dong Liang, Yijie Huo, Yangsen Kang, Ken Xingze Wang, Anjia Gu, Meiyueh Tan, Zongfu Yu, Shuang Li, Jieyang Jia, Xinyu Bao, Shuang Wang, Yan Yao, H.-S. Philip Wong, Shanhui Fan, Yi Cui and James S. Harris
Article first published online: 31 MAY 2012 | DOI: 10.1002/aenm.201200022
A 160 nm thick GaAs thin film of nanopyramid arrays on flexible transparent superstrates demonstrates excellent optical absorption properties. Due to significant antireflection and light trapping effects, the double-sided nanostructures enhance the photon absorption in the thin film by over 80% at near normal incidence and over 100% at 40–70° incidence.