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Related Concept Videos

Quantum Numbers02:43

Quantum Numbers

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It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
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The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
59.7K
Range00:59

Range

14.3K
The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
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Metallic Solids02:37

Metallic Solids

20.9K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.9K
Structures of Solids02:22

Structures of Solids

18.2K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
18.2K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

20.2K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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Updated: Feb 11, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Room temperature solid-state quantum emitters in the telecom range.

Yu Zhou1, Ziyu Wang1, Abdullah Rasmita1

  • 1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.

Science Advances
|April 20, 2018
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Summary
This summary is machine-generated.

Researchers developed a room-temperature, telecom-wavelength single-photon emitter for quantum technologies. This robust solid-state source offers high brightness and photon purity, advancing quantum communication and simulation.

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Area of Science:

  • Quantum optics and photonics
  • Solid-state physics
  • Materials science

Background:

  • Single-photon emitters (SPEs) are crucial for quantum technologies like quantum networks and quantum key distribution.
  • Telecom wavelength operation is essential for reduced fiber loss in quantum communication.
  • A robust, room-temperature SPE operating at telecom wavelengths remains a significant challenge.

Purpose of the Study:

  • To report a triggered, optically stable, room-temperature solid-state SPE operating at telecom wavelengths.
  • To characterize the performance of these SPEs in terms of photon purity and brightness.
  • To explore the potential applications of these SPEs in quantum technologies.

Main Methods:

  • Fabrication and optical characterization of localized defects in gallium nitride (GaN) crystals.
  • Utilizing triggered, on-demand single-photon emission measurements.
  • Assessing photon purity via multiphoton event detection and brightness via emission rate.

Main Results:

  • Demonstration of a triggered, optically stable SPE operating at room temperature and telecom wavelengths.
  • Achieved high photon purity with approximately 5% multiphoton events.
  • Recorded a record-high brightness of approximately 1.5 MHz.

Conclusions:

  • Localized defects in GaN serve as high-performance SPEs.
  • The developed SPEs are promising for practical quantum communication technologies.
  • This breakthrough advances the development of on-chip quantum simulators and other quantum devices.