Detection of electrical spin injection by light-emitting diodes in top- and side-emission configurations
- 25 March 2003
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 82 (13), 2160-2162
- https://doi.org/10.1063/1.1564873
Abstract
Detection of the degree of circular polarization of the electroluminescence of a light-emitting diode (LED) fitted with a spin injecting contact (a spin-LED) allows the direct determination of the spin polarization of the injected carriers. Here, we compare the detection efficiency of (Al,Ga)As spin-LEDs fitted with a (Zn,Be,Mn)Se spin injector in top- and side-emission configurations. In contrast to top emission, we cannot detect the electrical spin injection in side emission by analyzing the degree of circular polarization of the electroluminescence. To reduce resonant optical pumping of quantum-well excitons in side emission, we have analyzed structures with mesa sizes as small as 1 μm.Keywords
This publication has 14 references indexed in Scilit:
- Electrical spin injection in a ferromagnet/tunnel barrier/semiconductor heterostructureApplied Physics Letters, 2002
- Efficient electrical spin injection from a magnetic metal/tunnel barrier contact into a semiconductorApplied Physics Letters, 2002
- Room-Temperature Spin Injection from Fe into GaAsPhysical Review Letters, 2001
- Fundamental obstacle for electrical spin injection from a ferromagnetic metal into a diffusive semiconductorPhysical Review B, 2000
- Electrical spin injection in a ferromagnetic semiconductor heterostructureNature, 1999
- Injection and detection of a spin-polarized current in a light-emitting diodeNature, 1999
- Observation of Spin Injection at a Ferromagnet-Semiconductor InterfacePhysical Review Letters, 1999
- Spin injection and the local Hall effect in InAs quantum wellsJournal of Magnetism and Magnetic Materials, 1999
- Spin-Polarized TransportPhysics Today, 1995
- Electronic analog of the electro-optic modulatorApplied Physics Letters, 1990