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

Biasing of P-N Junction

Biasing of P-N Junction

The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...

You might also read

Related Articles

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

Sort by

Same author

Partial decorrelation enabled quasi-error-free speckle computational spectrometer based on ferroelectric material with a large Pockels coefficient.

Optics express·2026

Same author

USP48 promotes tumour progression through the deubiquitination and stabilization of DBF4 in clear cell renal carcinoma.

Cancer cell international·2026

Same author

Design methodology for enhanced nonlinear wavelength conversion efficiency using periodically poled single-domain thin-film barium titanate.

Optics express·2026

Same author

Integrative analysis reveals the clinical utility of cancer-associated fibroblast-derived signature, and its implication for young-onset thyroid cancer.

Genes & diseases·2026

Same author

Approaches to Exceptional Points in the Framework of Non-Hermitian Random Matrices.

Entropy (Basel, Switzerland)·2026

Same author

Bone Marrow Mesenchymal Stromal Cells and Their Derived Extracellular Vesicles Protect Pancreatic Beta-TC-6 Cells From Hypoxia-Induced Injury via miR-539-3p-Mediated Downregulation of CD36 Expression.

Stem cells international·2026

Same journal

Spiky Magnetic Titania Particles for Integrated Exosome Capture and Metabolic Profiling Toward Cancer Diagnosis.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same journal

Versatile Targeted Celastrol Nanoassemblies for Enhanced Immunomodulatory Effects Against MRSA Infection.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same journal

Submicron Cu(In,Ga)Se<sub>2</sub> Solar Cells With Over 20% Efficiency Enabled by Novel Construction of U-Shape Ga-Gradient.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same journal

Brønsted Acid-Driven Dynamic LMCT Sites Transform Pt/Zeolite Into a Light-Responsive Oxidation Platform.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same journal

Self-Powered Triboelectric Nanogenerators in Intelligent Food Packaging: Recent Advances and Applications.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same journal

Vanadium Nitride Quantum-Dot Bidirectional Catalysis for Accelerated Polysulfide Redox in Room-Temperature Na-S Batteries.

Small (Weinheim an der Bergstrasse, Germany)·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 21, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Strong Laser Emission Modulation by Coherent Perfect Absorption Inside Complex-Coupled Distributed Feedback Laser

Yaoyao Liang¹, Jean-René Coudevylle¹, Henri Benisty²

¹Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, C2N - 10 Boulevard Thomas Gobert, Palaiseau cedex, 91120, France.

Small (Weinheim an Der Bergstrasse, Germany)

|September 30, 2024

Summary

This summary is machine-generated.

Researchers demonstrate Coherent Perfect Absorption (CPA) in a novel laser-modulator. This "light extinction by light" method achieves high spectral purity for advanced laser sources.

Keywords:

DFB lasers Parity‐Time symmetry coherent perfect absorption complex‐coupled Bragg grating laser‐modulator non‐Hermitian photonics

More Related Videos

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Related Experiment Videos

Last Updated: Jun 21, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Area of Science:

Optoelectronics
Photonics
Laser Physics

Background:

Coherent Perfect Absorption (CPA) is a phenomenon where light is completely absorbed by a material.
Electrically-injected distributed-feedback (DFB) lasers are crucial for various optical applications.
Integrating CPA with DFB lasers presents challenges in maintaining spectral purity.

Purpose of the Study:

To demonstrate the proof-of-concept for exploiting Coherent Perfect Absorption (CPA) in electrically-injected distributed-feedback laser sources.
To develop an integrated laser-modulator scheme based on CPA.
To achieve high spectral purity in single-frequency laser operation.

Main Methods:

Implementation of a complex grating with periodic in-phase modulation of real and imaginary parts of the complex grating index profile.
Utilizing an ultra-short external cavity formed by a metallic micro-mirror to generate the second beam for CPA.
Modulating both real and imaginary parts of the complex grating index profile.

Main Results:

Achieved single-frequency operation with 40 dB line purity at the Bragg frequency.
Demonstrated CPA as a modulation mechanism that preserves laser spectral purity.
Successfully integrated a laser and modulator using CPA principles.

Conclusions:

The developed integrated laser-modulator scheme effectively utilizes CPA for high-purity laser sources.
The complex-coupled grating is compatible with industrial technologies and applicable to various material platforms and wavelengths.
This approach offers a promising pathway for next-generation laser source applications.