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Related Concept Videos

Chirality in Nature02:30

Chirality in Nature

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. The...
Chirality02:25

Chirality

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...
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

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.
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Atomic Nuclei: Nuclear Spin State Overview01:03

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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
Fermi Level Dynamics01:12

Fermi Level Dynamics

The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
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The work...
Atomic Nuclei: Larmor Precession Frequency01:11

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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, and the angular frequency...

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Near-Unity Chiral Lasing Enabled by Quasi-Bound States in the Continuum.

Jose Mendoza-Carreño1, Luis A Pérez1, Carlota Ruiz De Galarreta1

  • 1Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Cerdanyola del Vallès, Spain.

Advanced Materials (Deerfield Beach, Fla.)
|June 19, 2026
PubMed
Summary

Soft nanoimprinting lithography enables scalable, cost-effective chiral nanostructures for efficient circularly polarized light sources. This advances nanophotonics for quantum and optical technologies.

Keywords:
bound statechirality (electromagnetism)circular polarizationlasing wavelengthmaterials sciencenanoimprint lithographynanophotonicsoptoelectronicsphotoluminescence

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Area of Science:

  • Nanophotonics
  • Chiral light generation
  • Organic electronics

Background:

  • Circularly polarized light is crucial for advanced technologies like optical communication and quantum computing.
  • Weak chiroptical responses in materials and costly nanofabrication hinder scalability.
  • Chiral nanophotonics enhances light-matter interactions using resonant nanostructures, particularly chiral bound states in the continuum (BICs).

Purpose of the Study:

  • To develop a scalable and cost-effective method for producing chiral nanostructures.
  • To achieve highly circularly polarized lasing emission using soft nanoimprinting lithography.
  • To investigate the coupling mechanisms between emitters and chiral BIC resonances.

Main Methods:

  • Soft nanoimprinting lithography for fabricating chiral nanostructures.
  • Embedding organic dye within the patterned resist for lasing.
  • Angular dispersion measurements, Fourier microscopy, and FDTD simulations for optical characterization.

Main Results:

  • Achieved nearly fully circularly polarized lasing emission (97%) from organic dye.
  • Demonstrated coupling of dye photoluminescence to supported chiral BIC resonances.
  • Confirmed BIC formation through coupling of orthogonally polarized TE and TM modes.

Conclusions:

  • Soft nanoimprinting lithography offers a scalable route to efficient chiral light sources.
  • This method overcomes limitations of traditional nanofabrication for nanophotonic devices.
  • Advances practical nanophotonic platforms for quantum and optical applications.