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

Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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...

You might also read

Related Articles

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

Sort by
Same author

Direct Synthesis of Ultrathin Hexagonal Boron Nitride Films on Si(001).

Nano letters·2026
Same author

From Photoluminescence Optimization to Green LED Fabrication: The Role of Molar Precursor Ratio in Carbon Dots.

Materials (Basel, Switzerland)·2026
Same author

A novel computational model of human iPSC-derived ventricular myocytes with improved L-type calcium current for application to Timothy syndrome.

Scientific reports·2026
Same author

Anisotropic redistribution of coherently de-channelled electrons around dislocations in gallium nitride revealed by 4D Scanning Transmission Electron Microscopy.

Ultramicroscopy·2026
Same author

Multi-filter diamond array time-of-flight particle detector in laser-plasma experiments.

The Review of scientific instruments·2026
Same author

Core-shell silica and fluorogenic hyaluronan nanomaterials in magnesium hydroxyapatite scaffolds for bone regeneration.

Scientific reports·2025

Related Experiment Video

Updated: May 13, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Room-temperature efficient light detection by amorphous Ge quantum wells.

Salvatore Cosentino1, Maria Miritello, Isodiana Crupi

  • 1MATIS IMM-CNR and Dipartimento di Fisica e Astronomia, Università di Catania, via S, Sofia 64, Catania 95123, Italy. salvatore.cosentino@ct.infn.it.

Nanoscale Research Letters
|March 19, 2013
PubMed
Summary
This summary is machine-generated.

Ultrathin germanium (Ge) films exhibit quantum confinement effects, enhancing visible light absorption for photodetector applications. This leads to improved light sensitivity and higher internal quantum efficiency in devices.

More Related Videos

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Related Experiment Videos

Last Updated: May 13, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Quantum confinement effects in ultrathin films significantly alter optical properties.
  • Germanium (Ge) is a key material for optoelectronic devices, but its visible light absorption needs enhancement.

Purpose of the Study:

  • To investigate quantum confinement effects in ultrathin amorphous Ge films.
  • To utilize these effects for enhanced light absorption in photodetector devices.

Main Methods:

  • Ultrathin amorphous Ge films (2-30 nm) embedded in SiO2 were fabricated using magnetron sputtering.
  • Optical absorption and photodetector performance were characterized.

Main Results:

  • Quantum confinement caused a blueshift in the Ge bandgap (0.8 to 1.8 eV).
  • Optical oscillator strength increased up to three times due to confined carriers.
  • Photodetectors achieved an internal quantum efficiency of 70%.

Conclusions:

  • Ultrathin Ge films demonstrate significant quantum confinement effects.
  • These effects can be leveraged to create highly sensitive photodetectors.