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

Molecular Spectroscopy: Absorption and Emission01:14

Molecular Spectroscopy: Absorption and Emission

2.4K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels.  Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
2.4K
IR Absorption Frequency: Delocalization01:04

IR Absorption Frequency: Delocalization

863
Electron delocalization refers to the distribution of electrons across multiple atoms within a molecule rather than being confined to a single atom or bond. This phenomenon is common in systems with conjugated bonds—structures where alternating single and double bonds allow π-electrons to move freely across the network. The movement of electrons stabilizes the molecule and can affect various chemical properties, including vibrational frequencies observed in IR spectroscopy.
In IR...
863
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

44.8K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
44.8K
IR Absorption Frequency: Hybridization01:21

IR Absorption Frequency: Hybridization

738
Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
738
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

818
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
818
Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

1.2K
Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
1.2K

You might also read

Related Articles

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

Sort by
Same author

Fatherhood experiences: A qualitative approach of cisgender and transgender fathers in assisted reproductive technologies (ART) situation with sperm donation.

Heliyon·2024
Same author

Dual second harmonic generation and up-conversion photoluminescence emission in highly-optimized LiNbO<sub>3</sub> nanocrystals doped and co-doped with Er<sup>3+</sup> and Yb<sup>3</sup>.

Nanoscale·2024
Same author

Two statistical regimes in the transition to filamentation.

Optics express·2023
Same author

Fine-Tuning of Entangled Two-Photon Absorption by Controlling the One-Photon Absorption Properties of the Chromophore.

The journal of physical chemistry letters·2023
Same author

Heralded Distribution of Single-Photon Path Entanglement.

Physical review letters·2020
Same author

Dynamics of the femtosecond laser-triggered spark gap.

Optics express·2020
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Related Experiment Video

Updated: Aug 22, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

8.6K

Spatial Properties of Entangled Two-Photon Absorption.

D Tabakaev1, A Djorović1, L La Volpe1

  • 1Département de Physique Appliquée, Université de Genève, 1211 Genève, Switzerland.

Physical Review Letters
|November 14, 2022
PubMed
Summary
This summary is machine-generated.

We studied entangled two-photon absorption in rhodamine 6G using entangled photon pairs. Entangled two-photon absorption shows beam waist dependence similar to classical two-photon absorption, explaining varied literature values.

More Related Videos

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

9.3K
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.6K

Related Experiment Videos

Last Updated: Aug 22, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

8.6K
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

9.3K
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.6K

Area of Science:

  • Quantum optics
  • Nonlinear spectroscopy
  • Photochemistry

Background:

  • Entangled two-photon absorption (ETPA) is a quantum phenomenon with potential applications in spectroscopy and imaging.
  • Understanding ETPA's dependence on spatial properties is crucial for its practical application.
  • Literature values for ETPA cross sections of dyes show significant variation, necessitating further investigation.

Purpose of the Study:

  • To experimentally investigate entangled two-photon absorption in rhodamine 6G.
  • To analyze the influence of spatial properties, specifically beam waist, on ETPA.
  • To compare ETPA's spatial dependence with classical absorption processes.

Main Methods:

  • Utilizing a high flux of broadband entangled photon pairs.
  • Attenuating entangled pair flux linearly and by reducing laser pump power.
  • Performing fluorescence-based Z-scan measurements to probe beam waist dependence.

Main Results:

  • Demonstrated a linear dependence of ETPA rate on laser pump power attenuation.
  • Showed a quadratic dependence of ETPA rate on linear pair flux loss.
  • Observed that ETPA exhibits a beam waist dependence analogous to classical two-photon absorption.

Conclusions:

  • The spatial properties, particularly beam waist, significantly influence ETPA.
  • The similarity in beam waist dependence between ETPA and classical two-photon absorption provides a unified understanding.
  • This finding helps reconcile discrepancies in reported ETPA cross-section values in scientific literature.