General Mechanism Involved in Subwavelength Optics of Conducting Microstructures: Charge-Oscillation-Induced Light Emission and Interference
Interactions between light and conducting microstructures or nanostructures can result in a variety of novel phenomena, but their underlying mechanisms have not been completely understood. From calculations of surface charge density waves on conducting gratings and by comparing them with classical surface plasmons, we revealed a general yet concrete picture regarding the coupling of light to free electron oscillation on structured conducting surfaces that can lead to oscillating subwavelength charge patterns (i.e., structured surface plasmons). New wavelets emitted from these light sources then destructively interfere to form evanescent waves. This principle, usually combined with other mechanisms, is mainly a geometrical effect that can be universally involved in light scattering from all periodic and non-periodic structures containing free electrons. This picture may provide clear guidelines for developing conductor-based nano-optical devices.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 985810
- Report Number(s):
- BNL-93740-2010-JA; KC020401G; TRN: US1006224
- Journal Information:
- Journal of the Optical Society of America A: Optics Image Science and Vision, Vol. 27, Issue 4; ISSN 1084-7529
- Country of Publication:
- United States
- Language:
- English
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