Related Experiment Video
Updated: Aug 22, 2025
09:00
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
10.0K
Light funneling by spin-orbit-coupled chiral particles on an arbitrary order exceptional surface.
Optics Express
|November 11, 2022
Summary
Researchers created an arbitrary order exceptional surface (ES) in chiral particles using photonic spin-orbit interaction. This breakthrough enables novel light funneling applications, including optical switches and energy harvesting.
Area of Science:
- Photonics
- Quantum Optics
- Materials Science
Background:
- Non-Hermitian exceptional points (EPs) offer unique properties for light manipulation.
- Chiral particles exhibit intriguing optical responses due to their asymmetry.
- Photonic spin-orbit interaction provides a mechanism for coupling light and matter with tailored properties.
Purpose of the Study:
- To realize an arbitrary order exceptional surface (ES) in a system of coupled chiral particles.
- To explore the potential of ES in optical devices and light management.
- To demonstrate a novel light funneling mechanism using chiral particle interactions.
Main Methods:
- Utilizing chiral particles coupled via photonic spin-orbit interaction in a dielectric waveguide.
- Employing linearly polarized light for selective excitation of chiral dipole modes.
- Engineering material loss and coupling distance to form the exceptional surface.
Main Results:
- Successfully realized an arbitrary order exceptional surface (ES) in the chiral particle system.
- Demonstrated unidirectional coupling of chiral dipole modes, leading to the formation of the ES.
- Implemented a light funnel device that converts free-space waves to guided waves.
Conclusions:
- The developed system provides a novel platform for manipulating light at non-Hermitian exceptional points.
- The light funnel demonstrates efficient energy transfer into a ring resonator, applicable for optical switches and energy harvesting.
- This work opens new avenues for designing advanced optical devices with tailored functionalities.
Related Concept Videos
02:30Chirality in Nature
13.6K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
13.6K
02:25Chirality
24.9K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
24.9K
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
5.9K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.9K
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
1.1K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.1K
01:18First Law: Particles in Two-dimensional Equilibrium
5.2K
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...
Newton's first law tells us about...
5.2K
02:18Fischer Projections
13.6K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines.
13.6K