Two-photon quantum dot excitation during optical trapping

TY - JOUR

T1 - Two-photon quantum dot excitation during optical trapping

AU - Pedersen, Liselotte Jauffred

AU - Oddershede, Lene Broeng

PY - 2010/5/12

Y1 - 2010/5/12

N2 - A single CW infrared laser beam can simultaneously trap and excite an individual colloidal quantum dot. Though the laser light is relatively weak, the excitation occurs through two-photon absorption. This finding eliminates the demand for an excitation light source in addition to a trapping laser in nanoscale experiments with simultaneous force-manipulation and quantum dot visualization. Also, we demonstrate that optical trapping efficiencies of individual quantum dots do not correlate with their emission wavelength or physical size.

AB - A single CW infrared laser beam can simultaneously trap and excite an individual colloidal quantum dot. Though the laser light is relatively weak, the excitation occurs through two-photon absorption. This finding eliminates the demand for an excitation light source in addition to a trapping laser in nanoscale experiments with simultaneous force-manipulation and quantum dot visualization. Also, we demonstrate that optical trapping efficiencies of individual quantum dots do not correlate with their emission wavelength or physical size.

U2 - 10.1021/nl100924z

DO - 10.1021/nl100924z

M3 - Journal article

C2 - 20402477

SN - 1530-6984

VL - 10

SP - 1927

EP - 1930

JO - Nano Letters

JF - Nano Letters

IS - 5

ER -