Search for "optical sensors" in Full Text gives 28 result(s) in Beilstein Journal of Nanotechnology.
Beilstein J. Nanotechnol. 2012, 3, 712–721, doi:10.3762/bjnano.3.81
Beilstein J. Nanotechnol. 2012, 3, 674–683, doi:10.3762/bjnano.3.77
Beilstein J. Nanotechnol. 2011, 2, 499–500, doi:10.3762/bjnano.2.53