Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
Silencer Select siRNAs

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 19 December 1997:
Vol. 278. no. 5346, p. 2027
DOI: 10.1126/science.278.5346.2027c
Prev | Table of Contents | Next

This Week in Science

Excited state energies in quantum-confined structures such as quantum dots can be shifted with an electric field through the Stark effect; this effect can be used to modulate an optical signal electrically. Empedocles and Bawendi (p. 2114) used fluorescence microscopy to measure the Stark effect in single cadmium selenide quantum dots. Shifts in the lowest excited state energy could be induced that were much larger than the apparent linewidths, and the excited states are highly polarizable-excited-state dipoles as large as ~90 Debye could be induced by local electrical fields.




ADVERTISEMENT
Click Me!

ADVERTISEMENT
Click Me!

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)