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Advancements in Nanowire Lasers: Fabrication and Applications in Silicon Integration

This overview discusses the innovative developments in nanowire lasers, focusing on their potential as integrated solutions on silicon substrates. Nanowires serve as natural laser cavities, utilizing their facets as mirrors and guiding light internally. The fabrication process involves depositing a polymer onto a glass substrate, followed by integration with a porous alumina membrane and annealing, resulting in nanowires with diameters of 250 to 350 nm and lengths averaging 6 µm. Key characteristics such as photoluminescence peaks at ~460 nm and high fundamental mode confinement are highlighted.

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Advancements in Nanowire Lasers: Fabrication and Applications in Silicon Integration

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Presentation Transcript

  1. Chris Chase EE235 4/9/07

  2. Introduction • Nanowire Lasers • Applications • Potential solution for a laser integrated on silicon • Nanowires act as a natural laser cavity • Nanowire facets act as mirrors • Nanowire itself guides light • This makes a nanowire a natural Fabry-Perot Cavity

  3. Fabrication Process • Deposit Poly(9,9-dioctylfluorene) (PFO) on glass substrate • Place against porous alumina membrane • Anneal for 2 hrs at 250 C, where polymer melts into holes in membrane • Dissolve membrane in NaOH • Resulting nanowires are generally between 250 and 350 nm in diameter and on average 6 µm in length • Nanowires have a PL peak at ~460 nm, which is similar to the bulk PL.

  4. Material Characterization

  5. Waveguiding Scale bar is 5 µm Calculations show that ~85% of fundamental mode should be confined

  6. Cavity Characteristics

  7. Lasing Characteristics

  8. Questions?

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