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Proceedings Paper

Subdiffraction limit nanophotonic waveguides by quantum dot array structure: modeling and simulation
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Paper Abstract

Building photonic integrated circuits, which overcome the quantum limitation of the uncertainty principle, requires a new paradigm for optical waveguide design that is fundamentally different from the conventional approach. With recent advances in creating nanomaterials, quantum dots made of semiconductor compounds have enabled manipulation of electron and photon interaction in the presence of optical or electrical stimulus. In this paper, we explore the frontier of using quantum dots in new waveguide structures to pave the way for devices whose dimensions are below the diffraction limit of light. These components handle signals in the optical domain, and exploit the high-speed and transparency advantages of light. We first calculate the gain spectrum for pulsed optically-pumped quantum dots and derive the gain coefficient for waveguides. Then, a new model for a quantum dot waveguide is presented and optimum waveguide structure for propagation is determined. The results for two material systems, CdSe and CdTe quantum dots operating in free space, are given throughout. The model may be applied and extended to other compounds and establishes a foundation for quantum dot nano-scale photonic integrated circuits. By utilizing the non-linear properties of quantum dots, the proposed device forms a basis for applications in sensing, computing, and signal processing.

Paper Details

Date Published: 29 December 2004
PDF: 9 pages
Proc. SPIE 5593, Nanosensing: Materials and Devices, (29 December 2004); doi: 10.1117/12.571496
Show Author Affiliations
Chia-Jean Wang, Univ. of Washington (United States)
Lih-Yuan Lin, Univ. of Washington (United States)


Published in SPIE Proceedings Vol. 5593:
Nanosensing: Materials and Devices
M. Saif Islam; Achyut K. Dutta, Editor(s)

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