Gain measurements on VCSEL material using segmented contact technique

Autor: C Hentschel, C P Allford, S-J Gillgrass, J Travers-Nabialek, R Forrest, J Baker, J Meiklejohn, D Powell, W Meredith, M Haji, J I Davies, S Shutts, P M Smowton

Publikováno v: Journal of Physics D: Applied Physics. 56:074003

We report direct measurements of the optical gain on vertical-cavity surface-emitting laser (VCSEL) material using a stripe-length method featuring segmented contacts. We utilise the similarity of the in-plane transverse electric (TE) polarised matri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e6ef98b0b54aecd9b8f51d6e1c370fd
https://doi.org/10.1088/1361-6463/acaf0b

Doping effects on the composition, electric and optical properties of MBE-grown 1.1 eV GaNAsSb layers

Autor: Iván Lombardero, D. Pucicki, Mario Ochoa, Carlos Algora, K. Bielak, Wan Khai Loke, J. I. Davies, Soon Fatt Yoon, Iván García, Mercedes Gabas, Laura Barrutia, A. D. Johnson, Kian Hua Tan, D. Fuertes-Marrón, S. Wickasono, Efraín Ochoa-Martínez

Publikováno v: Semiconductor Science and Technology, 2020-10-06, Vol. 35
Archivo Digital UPM
Universidad Politécnica de Madrid

Dilute nitrides based on GaAs constitute a family of compounds whose main characteristic is the band-gap tunability, depending on the nitrogen content. In this work we have focussed our attention on the indium free dilute nitrides, i.e. GaNAsSb with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83e2f784103f5ddd4fa7f7a66f6b50a2
http://oa.upm.es/66439/

Dust emissivity and absorption cross section in DustPedia late-type galaxies

Autor: Laura Magrini, I. De Looze, J. I. Davies, Maarten Baes, Simone Bianchi, Anthony P. Jones, Sébastien Viaene, S. C. Madden, Viviana Casasola, P. De Vis, Emmanuel M. Xilouris, Edvige Corbelli, Maud Galametz, A. Nersesian, Christopher J. R. Clark, Frédéric Galliano, Wouter Dobbels, Aleksandr V. Mosenkov, Nathalie Ysard

Publikováno v: ASTRONOMY & ASTROPHYSICS
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2019, 631, pp.A102. ⟨10.1051/0004-6361/201936314⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2019, 631, pp.A102. ⟨10.1051/0004-6361/201936314⟩

Aims: We compare the far-infrared to sub-millimetre dust emission properties measured in high Galactic latitude cirrus with those determined in a sample of 204 late-type DustPedia galaxies. The aim is to verify if it is appropriate to use Milky Way d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::632965bcb2b3404ead50edcbe1847be5
https://hdl.handle.net/1854/LU-8641166

Preliminary analysis of annealing impact on 1 eV GaNAsSb solar cells

Autor: R. Romero, Satrio Wicaksono, Soon Fatt Yoon, Wan Khai Loke, Pablo Caño, Iván Lombardero, Iván García, Mercedes Gabás, Mario Ochoa, Carlos Algora, Manuel Hinojosa, Andrew Johnson, Ignacio Rey-Stolle, J. I. Davies, Kian Hua Tan

Publikováno v: Proceedings of Spanish Conference on Electron Devices (CDE) 2017 | Spanish Conference on Electron Devices (CDE) 2017 | 08/02/2017-10/02/2017 | Barcelona, España
Archivo Digital UPM
Universidad Politécnica de Madrid

Impact of annealing temperature, time and process gas on 1 eV GaNAsSb solar cells is assessed. In situ and ex situ annealings are carried out in order to analyze their effect on the solar cell performance. Ex situ annealings on as grown samples using

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9bbae1ee30c87ac04055d75edf81e16d
http://oa.upm.es/50666/

Advances towards 4J lattice-matched including dilute nitride subcell for terrestrial and space applications

Autor: Sònia Estradé, Kian Hua Tan, Nicholas J. Ekins-Daukes, Mercedes Gabás, Carlos Algora, Helena Castán, Iván Lombardero, Iván García, Wan Khai Loke, Ignacio Rey-Stolle, L. Ayllon, Luis Cifuentes, Salvador Dueñas, Héctor García, Mario Ochoa, Soon Fatt Yoon, E. Ochoa, J. I. Davies, A. D. Johnson, Francesca Peiró, Satrio Wicaksono, Tomos Thomas

Publikováno v: 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC) | 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC) | 05/06/2016-10/06/2016 | Portland, OR, USA
Archivo Digital UPM
Universidad Politécnica de Madrid

Recent advances on the development of a 4J lattice-matched dilute nitride solar cell for terrestrial and space applications are described. Modeling of the solar cell is carried out using a drift-diffusion model and material parameters extracted from

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57598a52c7cc89b2fe2e2e3aab3a47eb
http://oa.upm.es/46733/