【研究成果】2013年

研究成果67

Colloidal quantum dot-based plasmon emitters with planar integration and long-range guiding
Masashi Miyata and Junichi Takahara
8 April 2013 / Vol. 21, No. 7 / OPTICS EXPRESS 7882

We have experimentally demonstrated the design of functional and controllably integrated QD-based plasmon emitters coupled to a thin metal film supporting long-range (∼ 35 μm), lowdispersion and two-dimensional isotropic plasmon guiding. The QD-based plasmon emitters analysed here have high potential for power-efficient emitters, and can also be applied to a wide range of frequencies by selection of QD size and composition. Our concept will be implemented with a plasmon emitter coupled to other planar plasmonic waveguides with same configurations such as metal slab plasmonic waveguides and dielectric-loaded plasmonic waveguides; these waveguides are now one of the best options for plasmonic routing and processing. Furthermore, the emitter can be integrated with other QD-based components, such as modulators and amplifiers with similar dimensions, in one-chip circuits by using our fabrication technique. We believe that the present work will be the basis of these applications and offer further development of a wide range of plasmonics.

(a) SIM image of the structure. The structural parameters are the same as for Fig. 2(e). (b) Fluorescence image with an excitation laser focused onto the QD layer. The arrow shows the polarization of an excitation laser.