Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Tunable topological charge vortex microlaser.

Science (New York, N.Y.)·2020

Same author

Photocurrent detection of the orbital angular momentum of light.

Science (New York, N.Y.)·2020

Same author

The efficacy of single-photon emission computed tomography in identifying dystonic muscles in cervical dystonia.

Nuclear medicine communications·2020

Same author

miR-20a/Foxj2 Axis Mediates Growth and Metastasis of Colorectal Cancer Cells as Identified by Integrated Analysis.

Medical science monitor : international medical journal of experimental and clinical research·2020

Same author

Attenuated heart rate recovery in children and adolescents with obstructive sleep apnea syndrome.

Pediatric research·2020

Same author

N-Terminal Fused Signal Peptide Prompted Extracellular Production of a Bacillus-Derived Alkaline and Thermo Stable Xylanase in E. coli Through Cell Autolysis.

Applied biochemistry and biotechnology·2020

Search research articles

Related Experiment Video

Updated: Apr 25, 2026

Implementation of a Coherent Anti-Stokes Raman Scattering CARS System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope

Implementation of a Coherent Anti-Stokes Raman Scattering CARS System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope

Published on: July 17, 2016

PT-symmetric microring laser-absorber.

Stefano Longhi, Liang Feng

|August 29, 2014

Summary

This summary is machine-generated.

This study explores PT-symmetric microrings, achieving unidirectional lasing or coherent perfect absorption (CPA). Above the PT-symmetry breaking point, single-mode lasing and CPA are simultaneously realized with controllable mode excitation.

More Related Videos

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

Published on: June 2, 2017

Related Experiment Videos

Last Updated: Apr 25, 2026

Implementation of a Coherent Anti-Stokes Raman Scattering CARS System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope

Implementation of a Coherent Anti-Stokes Raman Scattering CARS System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope

Published on: July 17, 2016

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

Published on: June 2, 2017

Area of Science:

Photonics
Quantum physics
Optical engineering

Background:

PT-symmetric systems offer unique optical properties.
Microring resonators are key components in integrated photonics.
Coherent perfect absorption (CPA) enables complete light absorption.

Purpose of the Study:

Investigate lasing and CPA in PT-symmetric microrings.
Explore the role of mixed index and gain gratings.
Analyze the impact of coupling to a bus waveguide.

Main Methods:

Theoretical investigation of PT-symmetric microring systems.
Analysis of complex gratings at and above the PT-symmetry breaking point.
Modeling of external coupling to a bus waveguide.

Main Results:

Unidirectional lasing achieved at the PT-symmetry breaking point, but without mode discrimination or simultaneous CPA.
Single-mode lasing and simultaneous CPA obtained above the PT-symmetry breaking point.
Controllable excitation of clockwise and counterclockwise modes demonstrated.

Conclusions:

PT-symmetric microrings can achieve simultaneous single-mode lasing and CPA.
The grating's PT-symmetry breaking point is critical for controlling optical properties.
Tunable excitation of ring modes offers advanced optical control.