Now showing items 1-10 of 10

  • Four-wave mixing in photonic crystal waveguides : slow light enhancement and limitations 

    Li, Juntao; O'Faolain, Liam; Rey, Isabella Helen; Krauss, Thomas Fraser (2011-02-28) - Journal article
    We demonstrate continuous wave four-wave mixing in silicon photonic crystal waveguides of 396 mu m length with a group index of n(g) = 30. The highest observed conversion efficiency is -24 dB for 90 mW coupled input pump ...
  • Four-wave mixing in slow light photonic crystal waveguides with very high group index 

    Li, Juntao; O'Faolain, Liam; Krauss, Thomas F. (2012-07-30) - Journal article
    We report efficient four-wave mixing in dispersion engineered slow light silicon photonic crystal waveguides with a flat band group index of n(g) = 60. Using only 15 mW continuous wave coupled input power, we observe a ...
  • High speed e-beam writing for large area photonic nanostructures—a choice of parameters 

    Li, Kezheng; Li, Juntao; Reardon, Christopher; Schuster, Christian S.; Wang, Yue; Triggs, Graham J.; Damnik, Niklas; Muënchenberger, Jana; Wang, Xuehua; Martins, Emiliano R.; Krauss, Thomas F. (2016-09-16) - Journal article
    Photonic nanostructures are used for many optical systems and applications. However, some high-end applications require the use of electron-beam lithography (EBL) to generate such nanostructures. An important technological ...
  • Indirect transitions of a signal interacting with a moving refractive index front 

    Munoz, Michel Castellanos; Petrov, Alexander Yu; O'Faolain, Liam; Li, Juntao; Krauss, Thomas F.; Eich, Manfred (SPIE, 2014) - Conference item
    The dynamic manipulation of light can be achieved by the interaction of a signal pulse propagating through or reflected from a refractive index front. Both the frequency and the wave vector of the signal are changed in ...
  • Integrated optical auto-correlator based on third-harmonic generation in a silicon photonic crystal waveguide 

    Monat, Christelle; Grillet, Christian; Collins, Matthew; Clark, Alex; Schroeder, Jochen; Xiong, Chunle; Li, Juntao; O'Faolain, Liam; Krauss, Thomas F.; Eggleton, Benjamin J.; Moss, David J. (2014-02-05) - Journal article
    The ability to use coherent light for material science and applications is linked to our ability to measure short optical pulses. While free-space optical methods are well established, achieving this on a chip would offer ...
  • Optically Induced Indirect Photonic Transitions in a Slow Light Photonic Crystal Waveguide 

    Munoz, Michel Castellanos; Petrov, Alexander Yu.; O'Faolain, Liam; Li, Juntao; Krauss, Thomas F.; Eich, Manfred (2014-02-06) - Journal article
    We demonstrate indirect photonic transitions in a silicon slow light photonic crystal waveguide. The transitions are driven by an optically generated refractive index front that moves along the waveguide and interacts with ...
  • Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide 

    Xiong, C.; Monat, Christelle; Clark, Alex S.; Grillet, Christian; Marshall, Graham D.; Steel, M. J.; Li, Juntao; O'Faolain, Liam; Krauss, Thomas Fraser; Rarity, John G.; Eggleton, Benjamin J. (2011-09-01) - Journal article
    We report the generation of correlated photon pairs in the telecom C-band at room temperature from a dispersion-engineered silicon photonic crystal waveguide. The spontaneous four-wave mixing process producing the photon ...
  • Spatial resolution effect of light coupling structures 

    Li, Juntao; Li, Kezheng; Schuster, Christian; Su, Rongbin; Wang, Xuehua; Borges, Ben-Hur V.; Krauss, Thomas F.; Martins, Emiliano R. (2015-12-18) - Journal article
    The coupling of light between free space and thin film semiconductors is an essential requirement of modern optoelectronic technology. For monochromatic and single mode devices, high performance grating couplers have been ...
  • Ultracompact 160 Gbaud all-optical demultiplexing exploiting slow light in an engineered silicon photonic crystal waveguide 

    Corcoran, Bill; Pelusi, Mark D.; Monat, Christelle; Li, Juntao; O'Faolain, Liam; Krauss, Thomas F.; Eggleton, Benjamin J. (2011-05-01) - Journal article
    We demonstrate all-optical demultiplexing of a high-bandwidth, time-division multiplexed 160 Gbit/s signal to 10 Gbit/s channels, exploiting slow light enhanced four-wave mixing in a dispersion engineered, 96 mu m long ...
  • Ultracompact all-optical XOR logic gate in a slow-light silicon photonic crystal waveguide 

    Husko, C.; Vo, T. D.; Corcoran, B.; Li, Juntao; Krauss, Thomas Fraser; Eggleton, B. J. (2011-10-10) - Journal article
    We demonstrate an ultracompact, chip-based, all-optical exclusive-OR (XOR) logic gate via slow-light enhanced four-wave mixing (FWM) in a silicon photonic crystal waveguide (PhCWG). We achieve error-free operation (<10(-9)) ...