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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