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Driscoll, Ophir, Grote, Dadap, Panoiu, Bergman, Osgood , Optics Express, 20, 9227-9242 (2012)

Enhancing the conversion efficiency of four-wave-mixing by modulating waveguide geometry Richard M. Osgood, Columbia University, DMR 0806682.

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Driscoll, Ophir, Grote, Dadap, Panoiu, Bergman, Osgood , Optics Express, 20, 9227-9242 (2012)

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  1. Enhancing the conversion efficiency of four-wave-mixing by modulating waveguide geometry Richard M. Osgood, Columbia University, DMR 0806682 Four-wave-mixing (FWM) in Si waveguides has been used as a tool for realizing a number of highly compact devices on an integrated chip, such as wavelength converters, modulation format converters, and amplifiers. However, these devices are limited by significant dispersion, which in turn limits the optical bandwidth and efficiency. We have now demonstrated that by engineering a periodic modulation in the waveguide’s geometry (by only tens of nm), high dispersion can be compensated in a process akin to dielectric quasi-phase-matching, leading to more than an order-of-magnitude enhancement in FWM conversion efficiency for wavelengths well beyond the unmodulated waveguide’s 3-dB bandwidth. Enhanced four-wave-mixing process in a width-modulated Si waveguide >100 nm > 12 dB conversion efficiency enhancement, 100 nm from the edge of the 3-dB bandwidth Driscoll, Ophir, Grote, Dadap, Panoiu, Bergman, Osgood, Optics Express, 20, 9227-9242 (2012)

  2. Enhancing the conversion efficiency of four-wave-mixing by modulating waveguide geometry Richard M. Osgood, Columbia University, DMR 0806682 Our research group includes an unusually broad group of collaborators. These include the Osgood and the Bergman Groups at Columbia, Prof. Nicolae Panoiu at University College London, and the Center for Functional Nano-materials, Brookhaven National Laboratory. This large spectrum of senior personnel as well as their locations provide an excellent educational experience for the three students in this program. Note that our lead student – Jeffrey Driscoll – was awarded the the Maiman Award at this year’s CLEO for Best Student Paper! Jeffrey Driscoll Richard Grote Noam Ophir Dr. Ming Lu Dr. Aaron Stein Prof. Nicolae Panoiu Dr. Jerry Dadap Prof. Keren Bergman Prof. Richard Osgood

  3. Utilize the Notes Page Function of PowerPointRichard M. Osgood, Columbia University, DMR 0806682 • The best way to view the whole Notes Page is to select “Notes Page” in the “View” ribbon. • Please try it. • By default, the top half of a Notes Page is used to display the graphic of the corresponding Slide. • The graphic can be deleted from the Notes Page - thus, an entire page is available to you for written description. It is safe to delete the graphic from the Notes Page; doing so will not delete the Slide itself. • Please compare the Notes Pages of this and previous slides.

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