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Conference Paper
Polymeric Variable Optical Attenuator based on Surface Plasmon Polariton
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- Authors
- Sun Tak Park, Yong Sung Eom, Hyong Sik Won, Seok Ho Song
- Issue Date
- 2006-04
- Citation
- Photonics Europe, pp.1-7
- Language
- English
- Type
- Conference Paper
- Abstract
- We propose a polymeric variable optical attenuator based on long range surface plasmon polaritons (LRSPPs) along a thin metal stripe embedded in polymers. The device is operated by controlling radiation loss of the LRSPP mode resulting from the temperature gradient of the polymer cladding caused by a heater. For guiding LRSPPs and efficient coupling of single mode fibers, gold stripes with 20-nm thickness, 4-μm width and 1-cm length are utilized. To obtain long physical lifetime, the heater is formed on the top of the polymer cladding with a 200-nm Au film which is about ten times thicker than the thin metal waveguide. The fabricated device is characterized at a wavelength of 1.55 μm, exhibiting high attenuation of less than 30 dB with the operating power of 100 mW. The fiber-to-fiber total insertion loss of 6.1 dB is achieved when using single mode fibers.
- KSP Keywords
- Au film, Efficient coupling, Long-range surface plasmon, Operating power, Polymer cladding, Radiation loss, Single-mode fiber(SMF), Surface plasmon(SP), Temperature gradient, insertion loss, surface plasmon polariton(SPP)