Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3225156
Keywords
isomerisation; optical polymers; polaritons; polymer films; surface plasmons
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Funding
- National Natural Science Foundation of China [60778045, 60736037]
- National Research Foundation of Singapore [NRF-G-CRP2007-01]
- Ministry of Science and Technology of China [2009DFA52300]
- Nankai University (China)
- Nanyang Technological University (Singapore)
- National Key Basic Research Program of China [2006CB302905]
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Active control of surface plasmon polaritons (SPPs) by optical isomerization of an azobenzene polymer film is proposed and demonstrated in this letter. A tightly focused 532 nm laser beam was used to change the wave number of the SPPs and a separate unpolarized light source was employed to erase the change, forming one cycle of the control. The largest change of the SPPs wave number obtained in the experiments is about 0.0382K(0) in the case of 54 nm thickness azo-polymer film. Validity of this method is confirmed by consistence between theoretical and experimental results.
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