Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Catastrophic optical bulk damage in InP 7xx emitting quantum dot diode lasers

Elliott, Stella, Hempel, M., Zeimer, U., Smowton, Peter Michael and Tomm, J. W. 2012. Catastrophic optical bulk damage in InP 7xx emitting quantum dot diode lasers. Semiconductor Science and Technology 27 (10) , 102001. 10.1088/0268-1242/27/10/102001

Full text not available from this repository.

Abstract

Catastrophic optical bulk damage occurs in broad-area MOCVD-grown InP/(Al)GaInP 7xx emitting quantum dot diode lasers operated at high power with single, high-current pulses of 5–20 A, in contrast with quantum well devices, which undergo catastrophic optical mirror damage at similar power densities at the facet. After damage the quantum dot devices show a reduction in the nearfield emission intensity across the width of the facet. Panchromatic cathodoluminescence of the active region shows a decrease in intensity and reveals dark, non-radiative spots which enlarge as pulse length increases. The areal density of the spots, also present in unprocessed material from similar structures, is of the order of 106 cm−2, five orders of magnitude lower than the dot populations at 1011 cm−2. Increasing pump current pulse length to 500 ns and beyond did not increase the dark spot size, which depended on the duration of the lasing action, but decreased the cathodoluminescence intensity of both the spots and background regions inside the emitter stripe, while reference regions outside the stripe remained unchanged. These features can be used to characterize improvements in structures and growth in order to improve the performance of InP based quantum dot structures at high powers.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Institute of Physics
ISSN: 0268-1242
Last Modified: 05 Nov 2019 04:05
URI: http://orca.cf.ac.uk/id/eprint/39379

Citation Data

Cited 3 times in Google Scholar. View in Google Scholar

Cited 3 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item