Article

Stopping and time reversing a light pulse using dynamic loss tuning of coupled-resonator delay lines

Department of Electrical Engineering, Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Optics Letters (Impact Factor: 3.18). 12/2007; 32(22):3333-5. DOI: 10.1364/OL.32.003333
Source: PubMed

ABSTRACT We introduce a light-stopping process that uses dynamic loss tuning in coupled-resonator delay lines. We demonstrate via numerical simulations that increasing the loss of selected resonators traps light in a zero group velocity mode concentrated in the low-loss portions of the delay line. The large dynamic range achievable for loss modulation should increase the light-stopping bandwidth relative to previous approaches based on refractive index tuning.

Download full-text

Full-text

Available from: Sunil Sandhu, Aug 23, 2015
1 Follower
 · 
73 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: We present a novel mechanism,which is formed by periodically changing the radii of dielectric rods in the middle row of a photonic crystal, to control and stop light. Using the Bloch theory and coupled-mode theory, the dispersion characteristic of such a photonic crystal coupled cavity optical waveguide is obtained. We also theoretically demonstrate that the group velocity of a light pulse in this system can be modulated by dynamically changing the refractive index or radii of the selected dielectric rods, and the light stopping can be achieved.
    Optoelectronics Letters 01/2012; 8(1). DOI:10.1007/s11801-012-0141-4
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We describe a dynamically tuned system capable of capturing light pulses incident from a waveguide in a pair of microcavities. We use coupled mode theory to design a method for determining how to tune the microcavity resonant frequencies. The results show that pulses can be captured almost completely, with arbitrarily small reflected power. We optimize the pulse capture bandwidth by varying the cavity coupling constants and show that the maximum bandwidth is comparable to the resonant-frequency tuning range. Our system may be implemented using refractive-index tuning in a 2-D silicon photonic crystal slab. Current technology would allow for capture of pulses with widths as low as ~100 ps, with a holding time limited only by cavity loss rates.
    Journal of Lightwave Technology 12/2008; 26(23):3784-3793. DOI:10.1109/JLT.2008.2005511 · 2.86 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The authors develop optofluidic coupled ring resonator (OCRR) system in which one of the ring resonators serves as a microfluidic channel. Highly sensitive tuning of the OCRR is demonstrated by making small changes in the refractive index of the fluid. A refractometric sensing scheme using the OCRR is proposed and demonstrated, allowing for measuring a refractive index change down to 10−9 refractive index units, two orders of magnitude better than a single ring resonator.
    Microfluidics and Nanofluidics 01/2009; 6(3):425-429. DOI:10.1007/s10404-008-0372-7 · 2.67 Impact Factor
Show more