Non-Emissive Relaxation Dynamics in CdTe Quantum dots

Non-Emissive Relaxation Dynamics in CdTe Quantum dots [Pg.148]

4 Relaxation Dynamics of Non-Emissive State for Water-Soluble CdTe Quantum Dots 149 [Pg.149]

1 5 8-iiriiiu iirimi i iniiii i iiiiiii riiiini niiinif [Pg.149]

With the aim of elucidating molecular dynamics in a small domain, we have constmcted several microspectroscopic systems, that is, (i) the confocal microscope with the excitation light source being a femtosecond NIR laser emitting a 35 fs pulse, and (ii) the fluorescence correlation spectroscopic system with optical tweezers. [Pg.150]

The NIR femtosecond laser microscope realized higher order multi photon excitation for aromatic compounds interferometric autocorrelation detection of the fluorescence from the microcrystals of the aromatic molecules confirmed that their excited states were produced not via stepwise multiphoton absorption but by simultaneous absorption of several photons. The microscope enabled us to obtain three-dimensional multiphoton fluorescence images with higher spatial resolution than that limited by the diffraction theory for one-photon excitation. [Pg.151]