Related Experiment Video
Updated: Apr 24, 2026

08:01
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
6.6K
Magnetic-mechanical-electrical-optical coupling effects in GaN-based LED/rare-earth terfenol-D structures
Mingzeng Peng1, Yan Zhang, Yudong Liu
1Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China.
Advanced Materials (Deerfield Beach, Fla.)
|September 4, 2014
Summary
This study explores a novel structure combining Gallium Nitride (GaN) optoelectronics with Terfenol-D, revealing rich multi-field coupling effects for advanced device applications.
Area of Science:
- Materials Science
- Optoelectronics
- Magnetism
Background:
- Gallium Nitride (GaN)-based devices offer unique optoelectronic properties.
- Terfenol-D exhibits significant magnetomechanical (giant magnetostrictive) effects.
- Integrating these materials presents opportunities for novel functionalities.
Purpose of the Study:
- To design and investigate a multi-field coupling structure integrating GaN optoelectronics and Terfenol-D.
- To explore the interplay between magnetic, mechanical, electrical, and optical properties.
- To identify potential new research avenues.
Main Methods:
- Fabrication of a hybrid GaN-Terfenol-D structure.
- Characterization of optoelectronic properties of GaN components.
- Evaluation of magnetomechanical responses of Terfenol-D.
- Analysis of coupling effects between the integrated components.
Main Results:
- Demonstration of a functional multi-field coupling structure.
- Observation of significant interactions between optical, electrical, magnetic, and mechanical domains.
- Quantification of GaN piezoelectronic characteristics and Terfenol-D magnetomechanical properties.
- Evidence of synergistic effects arising from the combination.
Conclusions:
- The designed structure enables the study of complex multi-field coupling.
- This integration unlocks multifunctionalities not achievable with individual components.
- Potential for new applications in sensors, actuators, and tunable optoelectronic devices is highlighted.
More Related Videos
Related Concept Videos
Ferromagnetism
2.8K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.8K
Colors and Magnetism
12.0K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.0K
¹H NMR: Long-Range Coupling
2.4K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
2.4K
Magnetic Damping
1.3K
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
1.3K
Biasing of Metal-Semiconductor Junctions
903
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
903
π Electron Effects on Chemical Shift: Overview
1.5K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.5K

