Related Experiment Video

Updated: May 30, 2025

High-speed Particle Image Velocimetry Near Surfaces
11:59

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

33.0K

Chaos from a free-running broad-area VCSEL

Jules Mercadier, Stefan Bittner, Damien Rontani

    Optics Letters
    |January 31, 2025
    PubMed
    Summary

    Researchers detected chaos in a commercial vertical-cavity surface-emitting laser (VCSEL) without external manipulation. This study characterizes the nonlinear dynamics and complexity, linking chaos to spatial mode competition and polarization effects.

    More Related Videos

    Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze11:15

    Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

    Published on: February 20, 2014

    13.0K
    WheelCon: A Wheel Control-Based Gaming Platform for Studying Human Sensorimotor Control08:18

    WheelCon: A Wheel Control-Based Gaming Platform for Studying Human Sensorimotor Control

    Published on: August 15, 2020

    4.9K

    Related Concept Videos

    LC Circuits01:21

    LC Circuits

    An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
    2.4K
    MOSFET: Enhancement Mode01:22

    MOSFET: Enhancement Mode

    Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
    In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
    270
    Semiconductors01:22

    Semiconductors

    There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
    Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
    533
    Oscillations In An LC Circuit01:30

    Oscillations In An LC Circuit

    An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
    2.2K
    RC Circuit without Source01:16

    RC Circuit without Source

    When a DC source is abruptly disconnected from an RC (Resistor-Capacitor) circuit, the circuit becomes source-free. Assuming that the capacitor was fully charged before the source was removed, its initial voltage, denoted as V0, can be considered as the initial energy that stimulates the circuit.
    Applying Kirchhoff's current law at the top node of the circuit and substituting the current values across the components, a first-order differential equation is obtained. By rearranging the terms...
    945
    Biasing of FET01:22

    Biasing of FET

    Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
    In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
    209