Local field effect in small semiconductor clusters and particles
- E.I. du Pont de Nemours and Co., Wilmington, DE (USA)
When small semiconductor clusters and particles are embedded in a dielectric medium with a lower refractive index (such as glasses, polymers, organic liquids, and air), the local electric field near the particle surface can be greatly enhanced compared to the incident field upon illumination. This local field enhancement effect can be important in the study of the spectroscopy and photophysical processes of semiconductor clusters and particles. Here the authors first present computational results on the size and wavelength dependence of the local field intensity enhancement factors for CdS and TiO{sub 2} particles, two commonly used photocatalysts. They then report an experimental attempt to observe this local field effect, manifested as structural resonances in the photoluminescence spectrum of monodisperse 1.1 {mu}m CdS particles.
- OSTI ID:
- 5170595
- Journal Information:
- Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 95:3; ISSN 0022-3654; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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