Linear dichroism of CdSe nanodots: Large anisotropy of the band-gap absorption induced by ground-state dipole moments

The authors measured the elec. field induced linear dichroism for a wide range of sizes of CdSe nanocrystals. Large ground-state dipole moments were obsd., esp. for the smallest crystals. In these, the authors found a very large anisotropy of the absorption and most of the dipole strength is along the direction of the ground-state dipole moment. For the anisotropy, the authors propose a mechanism for intensity borrowing from intraband transitions, induced by the field of the ground-state dipole moment.

Published in:
Physical Review B, 77, 16, 165303/1-165303/6
CAN 149:114617 73-4 Optical, Electron, and Mass Spectroscopy and Other Related Properties Institut de Sciences et Ingenierie Chimiques, FSB-BSP, Laboratory of Ultrafast Spectroscopy,Ecole Polytechnique Federale de Lausanne,Lausanne-Dorigny,Switz. Journal 1098-0121 written in English. 1306-24-7 (Cadmium selenide) Role: PRP (Properties) (linear dichroism of CdSe nanocrystal with large anisotropy of band-gap absorption induced by ground-state dipole moments)
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 Record created 2009-03-18, last modified 2018-03-17

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