Lasers for Studies of Quantum Dots and Molecules in Triplet States (DURIP)
Abstract
The final list of equipment purchased with DURIP plus matching funds is: (1) Innova Sabre DBW-1513 Argon Ion Laser. (2) Upgrade 699-21 Dye Laser to 899-21 dye laser. (3) Upgrade 699-29 to Autoscan 899-29 Autoscan dye/Titanium Sapphire Laser. The Argon Ion Laser is being used in Professor Bawendi's studies of the optical and electronic properties of single semiconductor dots. The Autoscan titanium sapphire/dry laser (899-29) is being used to study the structure and dynamics (mechanism of intersystem crossing) of triplet states of small polyatomic molecules. The 899-21 dry laser is being used in a collaborative project, to record dispersed fluorescence spectra of van der Waals molecules, with Prof. W. Klemperer at Harvard University. One laser system has been used in conjunction with two single-quantum dot (or molecule) fluorescence detection systems that we have designed and built. In the past year we have studied the quantum confined Stark effect in nanocrystal quantum dots. We found that the electric field dependence of the single-dot spectrum is characterized by a highly polarizable excited state, with the polarizability proportional to the volume of the dot.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1998
- Accession Number
- ADA356872
Entities
People
- Moungi Bawendi
- Robert W. Field
Organizations
- Massachusetts Institute of Technology