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

Carrier Generation and Recombination

Carrier Generation and Recombination

Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...

You might also read

Related Articles

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

Sort by

Same author

Inpatient and post-discharge thromboembolic events in inflammatory bowel disease patients: a 13 year retrospective cohort study at a tertiary Centre.

Scandinavian journal of gastroenterology·2026

Same author

Scalable photonic reservoir computing for parallel machine learning tasks.

Nature communications·2025

Same author

Bifurcation scenarios for chirped mode locking in a semiconductor laser.

Physical review. E·2025

Same author

Low Yield of Surveillance Endoscopy in Severe Oesophagitis: A 1700-Patient Retrospective Cohort Study.

Digestive diseases and sciences·2025

Same author

Reservoir computing with state-dependent time delay.

Physical review. E·2025

Same author

Extreme events in frequency-swept semiconductor lasers.

Physical review. E·2024

Same journal

Gaussian-modulated continuous-variable quantum key distribution over 60 km fiber using an integrated silicon photonic receiver.

Optics letters·2026

Same journal

E2E-OCT: end-to-end joint learning model using optical coherence tomography images for vocal cord leukoplakia diagnosis.

Optics letters·2026

Same journal

Holographic generation of panoramic 3D scenes by concave ellipsoidal mirror reflection.

Optics letters·2026

Same journal

Dual-pilot phase recovery with pair-wise maximum-ratio combining for coherent PONs.

Optics letters·2026

Same journal

Mapping the whispering gallery modes of a CaF<sub>2</sub> disk resonator with half-tapered fibers to estimate the fundamental mode volume.

Optics letters·2026

Same journal

Quantitative estimation of deep-subwavelength scale via dark-field scattering axial energy concentration decay profiles.

Optics letters·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Nov 21, 2025

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

Asymmetric excitable phase triggering in an optically injected semiconductor laser.

M Dillane, B Lingnau, E A Viktorov

|January 15, 2021

Summary

This summary is machine-generated.

Researchers discovered that optical phase perturbations can deterministically trigger excitable dynamics in quantum dot lasers. This study reveals two asymmetric thresholds and an unobserved upper limit for perturbation amplitude, advancing the understanding of excitability.

More Related Videos

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

Related Experiment Videos

Last Updated: Nov 21, 2025

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

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

Area of Science:

Nonlinear Dynamics
Quantum Optics
Semiconductor Lasers

Background:

Excitability is characterized by a threshold, the minimum perturbation needed for a response.
Dual state quantum dot lasers exhibit stochastic excitable dynamics.

Purpose of the Study:

To investigate deterministic triggering of excitable dynamics in optically injected dual state quantum dot lasers.
To analyze the role of optical phase perturbations in controlling excitable behavior.
To identify and characterize excitable thresholds in this system.

Main Methods:

Optical injection into a dual state quantum dot laser.
Application of controlled optical phase perturbations.
Analysis of system dynamics and response to perturbations.

Main Results:

Deterministic triggering of stochastic excitable dynamics was achieved using optical phase perturbations.
Two asymmetric excitable thresholds were identified, corresponding to perturbation direction.
An excitable interval was observed for fast perturbations, with an amplitude limit above which excitations cease.

Conclusions:

Optical phase perturbations offer a method for deterministic control of excitable dynamics in quantum dot lasers.
The discovery of asymmetric thresholds and an upper perturbation limit expands the understanding of excitability phenomena.
This work provides new insights into the fundamental mechanisms of excitable systems.