Single-mode light source fabrication based on colloidal quantum dots

Jianfeng Xu; Bing Chen; Sarfaraz Baig; Michael R. Wang

doi:10.1117/12.810536

18 February 2009 Single-mode light source fabrication based on colloidal quantum dots

Jianfeng Xu, Bing Chen, Sarfaraz Baig, Michael R. Wang

Proceedings Volume 7224, Quantum Dots, Particles, and Nanoclusters VI; 722415 (2009) https://doi.org/10.1117/12.810536
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

There are huge market demands for innovative, cheap and efficient light sources, including light emitting devices, such as LEDs and lasers. However, the light source development in the visible spectral range encounters significant difficulties these years. The available visible wavelength LEDs or lasers are few, large and expensive. The main challenge lies at the lack of efficient light media. Semiconductor nanocrystal quantum dots (QDs) have recently commanded considerable attention. As a result of quantum confinement effect, the emission color of these QDs covers the whole visible spectral range and can be modified dramatically by simply changing their size. Such spectral tunability, together with large photoluminescence quantum yield and photostability, make QDs attractive for potential applications in a variety of light emitting technologies. However, there are still several technical problems that hinder their application as light sources. One main issue is how to fabricate these QDs into a solid state device while still retaining their original optical emission properties. A vacuum assisted micro-fluidic fabrication of guided wave devices has demonstrated low waveguide propagation loss, lower crosstalk, and improved waveguide structures. We report herein the combination of the excellent emission properties of QDs and novel vacuum assisted micro-fluidic photonic structure fabrication technique to realize single-mode efficient light sources.

Citation Download Citation

Jianfeng Xu, Bing Chen, Sarfaraz Baig, and Michael R. Wang "Single-mode light source fabrication based on colloidal quantum dots", Proc. SPIE 7224, Quantum Dots, Particles, and Nanoclusters VI, 722415 (18 February 2009); https://doi.org/10.1117/12.810536

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KEYWORDS

Waveguides

Light sources

Quantum dots

Ultraviolet radiation

Visible radiation

Nanocrystals

Fabrication

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