Tailoring Spectral Properties of Binary PT-Symmetric Gratings by Duty-Cycle Methods

Anatole T. Lupu, Henri Benisty, Andrei Lavrinenko

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We explore the frequency selective functionalities of a nonuniform PT-symmetric Bragg grating with modulated complex index profile. We start by assessing the possibility to achieve an efficient apodization of the PT-symmetric Bragg grating spectral response by using direct adaptations of the conventional apodization techniques. A particular emphasis is put on the binary type structures with different duty cycle variations. We subsequently propose a new efficient grating modulation technique allowing for largely improved reflection/transmission characteristics of the Bragg gratings. The overall intention of our approach is to adapt conventional Bragg gratings designs to improve a PT-symmetric case, fostering thus a new generation of active photonic devices.
Original languageEnglish
Article number7434582
JournalIEEE Journal of Selected Topics in Quantum Electronics
Volume22
Issue number5
Number of pages7
ISSN1077-260X
DOIs
Publication statusPublished - 2016

Keywords

  • ENGINEERING,
  • OPTICS
  • PHYSICS,
  • NON-HERMITIAN HAMILTONIANS
  • BRAGG GRATINGS
  • GAIN/LOSS
  • Integrated optoelectronics
  • coupled mode analysis
  • optical amplifiers
  • PT-symmetry
  • waveguides
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Bins
  • Light amplifiers
  • Photonic devices
  • Waveguides
  • Active photonic devices
  • Apodization technique
  • Coupled-mode analysis
  • Frequency-selective
  • Grating modulation
  • PT symmetries
  • Spectral properties
  • Spectral response
  • Bragg gratings
  • Gratings, echelles
  • Other optical system components
  • light reflection
  • light transmission
  • optical modulation
  • transmission characteristics
  • active photonic devices
  • reflection characteristics
  • grating modulation technique
  • binary type structures
  • apodization
  • modulated complex index profile
  • nonuniform binary PT-symmetric Bragg grating
  • frequency selective functionality
  • duty-cycle methods
  • spectral properties
  • Gratings
  • Indexes
  • Modulation
  • Artificial intelligence
  • Couplings
  • Refractive index

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