Growth and Characterization of GaInNAs by Molecular Beam Epitaxy Using a Nitrogen Irradiation Method
Artikel i vetenskaplig tidskrift, 2009

We propose an innovative technique, making use of the In segregation effect, referred as the N irradiation method, to enhance In-N bonding and extend the emission wavelength of GaInNAs quantum wells (QWs). After the formation of a complete In floating layer, the growth is interrupted and N irradiation is initiated. The majority of N atoms are forced to bond with In atoms and their incorporation is regulated independently by the N exposure time and the As pressure. The effect of the N exposure time and As pressure on the N incorporation and the optical quality of GaInNAs QWs were investigated. Anomalous photoluminescence (PL) wavelength red shifts after rapid thermal annealing (RTA) were observed in the N-irradiated samples, whereas a normal GaInNAs sample revealed a blue shift. This method provides an alternative way to extend the emission wavelength of GaInNAs QWs with decent optical quality. We demonstrate light emission at 1546 nm from an 11-nm-thick QW, using this method and the PL intensity is similar to that of a 7-nm-thick GaInNAs QW grown at a reduced rate.

Författare

Huan Zhao Ternehäll

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Shu Min Wang

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Qing Xiang Zhao

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Mahdad Sadeghi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Nanotekniklaboratoriet

Anders Larsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Journal of Crystal Growth

0022-0248 (ISSN)

Vol. 311 1723-1727

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1016/j.jcrysgro.2008.11.070