Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Photoelectric Effect02:26

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
Carrier Generation and Recombination01:22

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...
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

You might also read

Related Articles

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

Sort by
Same author

Lateromedial gradient of the susceptibility of midbrain dopaminergic neurons to neonatal 6-hydroxydopamine toxicity.

Experimental neurology·1995
Same author

Neurotransmitters for the canine inferior pharyngeal constrictor muscle.

Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery·1995
Same author

p80/85 cortactin associates with the Src SH2 domain and colocalizes with v-Src in transformed cells.

The Journal of biological chemistry·1995
Same author

Cloning of a new cytokine that induces IFN-gamma production by T cells.

Nature·1995
Same author

A novel costimulatory factor for gamma interferon induction found in the livers of mice causes endotoxic shock.

Infection and immunity·1995
Same author

Adenylyl cyclase activity in human decidua and myometrium during pregnancy and labour.

Journal of reproduction and fertility·1995
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

Related Experiment Video

Updated: Jun 20, 2026

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
10:35

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

Photorefractive effect in GaP.

K Kuroda, Y Okazaki, T Shimura

    Optics Letters
    |September 23, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Researchers observed the photorefractive effect in Gallium Phosphide (GaP), finding sensitivity between 0.6-0.9 micrometers. The P antisite defect acts as the photorefractive center, with a maximum gain coefficient of 0.33 cm⁻¹ measured.

    More Related Videos

    Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
    08:01

    Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

    Published on: November 21, 2019

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
    11:08

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

    Published on: November 30, 2012

    Related Experiment Videos

    Last Updated: Jun 20, 2026

    Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
    10:35

    Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

    Published on: September 26, 2014

    Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
    08:01

    Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

    Published on: November 21, 2019

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
    11:08

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

    Published on: November 30, 2012

    Area of Science:

    • Optoelectronics
    • Semiconductor Physics
    • Materials Science

    Background:

    • The photorefractive effect is crucial for applications like optical data storage and phase conjugation.
    • Gallium Phosphide (GaP) is a wide bandgap semiconductor with potential for optoelectronic devices.
    • Understanding photorefractive properties in undoped GaP is essential for optimizing its use.

    Purpose of the Study:

    • To investigate and characterize the photorefractive effect in undoped, semi-insulating Gallium Phosphide (GaP).
    • To identify the photorefractive center responsible for the observed effect.
    • To measure key photorefractive parameters, including gain coefficient and time constant, as functions of experimental conditions.

    Main Methods:

    • Observation of the photorefractive effect in undoped semi-insulating GaP.
    • Two-beam coupling experiments were performed using a 633-nm He-Ne laser.
    • Measurements of gain coefficient and time constant were conducted as a function of grating period and pumping intensity.

    Main Results:

    • The photorefractive sensitivity of GaP was found to be in the spectral region of 0.6 to 0.9 micrometers.
    • The P antisite defect was identified as the deep donor acting as the photorefractive center.
    • A maximum two-beam coupling gain coefficient of 0.33 cm⁻¹ was achieved at a 1.1 micrometer grating period.
    • The time constant ranged from 3-20 msec, dependent on the grating period at 30 mW/cm² pumping intensity.

    Conclusions:

    • Undoped semi-insulating GaP exhibits a significant photorefractive effect.
    • The P antisite defect plays a critical role in the photorefractive properties of GaP.
    • The measured parameters provide valuable data for the development of GaP-based photorefractive devices.