Ju, Gunwu Lee, Subin Na, Byung Hoon Kim, Hyung-Jun Song, Young Min 2024-01-19T23:30:18Z 2024-01-19T23:30:18Z 2021-09-03 2018-03 1842-6573 https://pubs.kist.re.kr/handle/201004/121657 We demonstrate uniform and reproducible high-index-contrast distributed Braga reflectors (HIC-DBRs) by introdudno an oxidized digital-alloy (DA) layer for low index materials. Fine-tunable DA-Al0.98Ga0.02As layers, which consists of multiple stacks of 1 monolayer (ML)-thick GaAs and 49 ML-thick AlAs layers, are used for generating stable AlxOy layers instead of a conventional, bulk AlAs layers. Highly uniform arrays of oxidized alumina are obtained through a wet-oxidation of DAAlGaAs layers, which enable practical use of HIC-DBRs for vertical cavity surface emitting lasers (VCSELs) and other resonant-cavity based optoelectronic devices. Detailed experiments together with optical calculations are also shown. English Institutul National de Cercetare-Dezvoltare pentru Optoelectronica Highly reproducible high-index-contrast distributed Bragg reflectors with an oxidized digital-alloy AlGaAs Article 1 Optoelectronics and Advanced Materials, Rapid Communications, v.12, no.3-4, pp.137 - 139 Optoelectronics and Advanced Materials, Rapid Communications 12 3-4 137 139 N scie scopus 000436079800002 2-s2.0-85048666549 Materials Science, Multidisciplinary Optics Materials Science Optics Article GAAS ALAS/GAAS VCSELS Digital-alloy High-index-contrast Distributed Bragg reflector AlGaAs Oxidation VCSEL