Related Experiment Video
Updated: Nov 5, 2025
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
8.7K
Optical frequency conversion of light with maintaining polarization and orbital angular momentum
Optics Letters
|May 14, 2021
Summary
This study demonstrates optical frequency conversion that preserves light
Area of Science:
- Optics and Photonics
- Quantum Information Science
Background:
- Optical frequency conversion is crucial for manipulating light.
- Maintaining light's polarization and orbital angular momentum (OAM) during frequency conversion is vital for advanced applications.
- Interfaces between optical systems operating at different frequencies are needed for classical and quantum technologies.
Purpose of the Study:
- To experimentally demonstrate optical frequency conversion that preserves both polarization and orbital angular momentum (OAM).
- To enable the creation of interfaces between optical systems operating in different frequency regions while maintaining key light properties.
Main Methods:
- Utilizing a nonlinear Sagnac interferometer.
- Experimentally upconverting various polarization-OAM composite states of light.
Main Results:
- Successfully achieved frequency conversion while maintaining the polarization state of light.
- Successfully achieved frequency conversion while preserving the orbital angular momentum (OAM) of light.
- Demonstrated the upconversion of composite polarization-OAM states.
Conclusions:
- The developed scheme provides a novel method for optical frequency conversion.
- This technique allows for the preservation of polarization and OAM during frequency manipulation.
- Offers new possibilities for building waveband interfaces with multiple degrees of freedom for light.
Related Concept Videos
01:11Atomic Nuclei: Larmor Precession Frequency
2.1K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
2.1K
01:01Group Polarization
37.0K
Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
37.0K
01:21IR Absorption Frequency: Hybridization
997
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...
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...
997
01:30Propagation Speed of Electromagnetic Waves
4.2K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
4.2K
01:09Conservation of Angular Momentum
11.9K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Considering a system that consists of n tiny particles, the angular momentum of any tiny particle may change, but the system's total angular momentum would remain constant. The principle of conservation of angular momentum only considers the net external torque acting on the system. While there are internal forces exerted by different particles within the system that also produce...
11.9K
01:18Conservation of Angular Momentum: Application
11.7K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely spinning bicycle tire that slows over time due to torque arising from friction, or the slowing of Earth's rotation over millions of years due to frictional forces exerted on tidal deformations. However in the absence of a net external torque, the angular momentum remains conserved. The conservation of angular momentum principle requires a...
11.7K