Work

Detection of electrical spin injection by light-emitting diodes in top- and side-emission configurations

Year: 2003

Type: article

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.

Source: Applied Physics Letters

DOI: 10.1063/1.1564873

Authors: R. Fiederling, P. Grabs, W. Ossau, G. Schmidt, L. W. Molenkamp

Institution: University of Würzburg

Language: English

Topic: Semiconductor Quantum Structures and Devices

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2168596402

FWCI: 5.269

Cites: 15

Cited by: 75

Related to: 10