Optical setup and characterization of nanocapsules. (A) Schematic of optical setup. Items labeled with an asterisk are on flipmounts. [L: lens, LP: lens pair, M: mirror, DM: dichroic mirror, ND filter: neutral density filter] (B) Photolysis efficiencies of vesicles containing varying amounts of DiD using single 3ns laser pulses of 350nJ, 450nJ, and 550nJ energies at ~645nm. Error bars are standard error.