Subdiffraction Photon Guidance by Quantum-Dot Cascades

We report on a waveguide composed of a cascade of gain-enabled quantum dots with subwavelength dimensions. Fabrication is demonstrated through DNA-mediated self-assembly and a two-layer molecular self-assembly process that enables rapid prototyping. The device, which is identified with fluorescence...

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Bibliographic Details
Published in:Nano letters 2006-11, Vol.6 (11), p.2549-2553
Main Authors: Wang, Chia-Jean, Huang, Ludan, Parviz, Babak A, Lin, Lih Y
Format: Article
Language:English
Subjects:
Adsorption
Colloids - chemistry
Cross-disciplinary physics: materials science
rheology
Crystallization
DNA - chemistry
Exact sciences and technology
Materials science
Methods of nanofabrication
Microscopy, Fluorescence - methods
Nanoscale materials and structures: fabrication and characterization
Nanotechnology - methods
Optics and Photonics
Other topics in nanoscale materials and structures
Oxygen - chemistry
Photons
Physics
Polymethyl Methacrylate - chemistry
Quantum Dots
Self-assembly
Sensitivity and Specificity
Surface Properties
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Summary:We report on a waveguide composed of a cascade of gain-enabled quantum dots with subwavelength dimensions. Fabrication is demonstrated through DNA-mediated self-assembly and a two-layer molecular self-assembly process that enables rapid prototyping. The device, which is identified with fluorescence microscopy and tested by optical near field detection, allows optical signal transfer at a well-defined wavelength in flexible routing geometry, such as straight paths and 90° bends. The structure serves as a critical building block for nanophotonic systems with high integration density.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl061958g