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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 8 — Apr. 22, 2013
  • pp: 9473–9483

Resonant cavities based on Parity-Time-symmetric diffractive gratings

Mykola Kulishov, Bernard Kress, and Radan Slavík  »View Author Affiliations


Optics Express, Vol. 21, Issue 8, pp. 9473-9483 (2013)
http://dx.doi.org/10.1364/OE.21.009473


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Abstract

We explore a new class of Distributed Feedback (DFB) and Distributed Bragg Reflector (DBR) structures that employ the recently-developed concept of Parity-Time (PT) symmetry in optics. The approach is based on using so-called unidirectional Bragg gratings that are non diffractive (transparent) when illuminated from one side and diffracting (Bragg reflection) when illuminated from the other side, thus providing a uni-directional Bragg functionality. Such unusual property is achieved through diffraction through a grating having periodic variations in both, phase and amplitude. DFB and DBR structures traditionally consist of a gain medium and reflector(s) made via periodic variation of the (gain media) refractive index in the direction of propagation. As such structures are produced in a gain material. It becomes just possible to add periodic amplitude modulation in order to produce the unidirectional Bragg functionality. We propose here new and unique DFB and DBR structures by concatenating two such unidirectional Bragg gratings with their nonreflective ends oriented outwards the cavity. We analyze the transmission and reflection properties of these new structures through a transfer matrix approach. One of the unique characteristics of the structure is that it inherently supports only one lasing mode.

© 2013 OSA

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.2230) Diffraction and gratings : Fabry-Perot
(130.0130) Integrated optics : Integrated optics
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(200.0200) Optics in computing : Optics in computing
(200.4490) Optics in computing : Optical buffers

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 16, 2013
Revised Manuscript: April 4, 2013
Manuscript Accepted: April 5, 2013
Published: April 9, 2013

Citation
Mykola Kulishov, Bernard Kress, and Radan Slavík, "Resonant cavities based on Parity-Time-symmetric diffractive gratings," Opt. Express 21, 9473-9483 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-8-9473


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