Determination of the energy band gap of Bi2Se3

Autor: G. Martinez, B. A. Piot, M. Hakl, M. Potemski, Y. S. Hor, A. Materna, S. G. Strzelecka, A. Hruban, O. Caha, J. Novák, A. Dubroka, Č. Drašar, M. Orlita

Publikováno v: Scientific Reports, Vol 7, Iss 1, Pp 1-5 (2017)

Abstract Despite intensive investigations of Bi2Se3 in past few years, the size and nature of the bulk energy band gap of this well-known 3D topological insulator still remain unclear. Here we report on a combined magneto-transport, photoluminescence

Externí odkaz: https://doaj.org/article/7e81b95e3610416fbb61cb77ffc95248

Room Temperature Heterodyne Detection up to 70GHz with Antenna-Coupled Quantum-Well Photodetectors Operating at 10μm

Autor: Jun-Peng Cao, Quyang Lin, J-F. Lampin, Emilien Peytavit, M. Hakl, S. Barbieri, Wenjian Wan, Hui Li, Raffaele Colombelli, S. Pirotta

Publikováno v: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nov 2020, Buffalo, NY, USA, United States. pp.1-2, ⟨10.1109/IRMMW-THz46771.2020.9370361⟩

III-V semiconductor mid-infrared photodetectors based on intersubband transitions hold a great potential for ultra-high-speed operation up to several hundreds of GHz. In this work we exploit a ~350nm-thick GaAs/Al 0.2 Ga 0.8 As multi-quantum-well het

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::150dc0917fcf31aba664eb6450d172ab
https://hal.science/hal-03191460

High speed, antenna-enhanced 10.3μm quantum cascade detector

Autor: G. Quinchard, C. Mismer, M. Hakl, J. Pereira, Q. Lin, S. Lepillet, V. Trinité, A. Evirgen, E. Peytavit, J. L. Reverchon, J. F. Lampin, S. Barbieri, A. Delga

Publikováno v: Applied Physics Letters
Applied Physics Letters, 2022, 120 (9), pp.091108. ⟨10.1063/5.0078861⟩

International audience; The strong potential of intersubband detectors in the field of mid-infrared photodetection places this technology as a relevant alternative to HgCdTe detectors in the race for ultrafast operation. While their extremely short p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::881b89d9153e6822abbbb452f44f7f29
https://doi.org/10.1063/5.0078861

Opening science to society: how to progress societal engagement into (open) science policies

Autor: U. Wehn, R. Ajates, C. Mandeville, L. Somerwill, G. Kragh, M. Haklay

Publikováno v: Royal Society Open Science, Vol 11, Iss 5 (2024)

A broad understanding of the aims and objectives of the international open science movement was recently adopted with the 2021 UNESCO Recommendation on Open Science, expanding the focus of open science to include scientific knowledge, infrastructures

Externí odkaz: https://doaj.org/article/0548ef10427647c5bd6c887819a30a43

High speed antenna enhanced mid-infrared quantum cascade detector

Autor: Stefano Barbieri, A. Delga, V. Trinite, M. Hakl, A. Evirgen, Emilien Peytavit, C. Mismer, J-F. Lampin, M. Garcia, A. Larrue, G. Quinchard

Publikováno v: 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).

We demonstrate a λ=10.3 μm Quantum Cascade Detector embedded in a subwavelength optical patch antenna cavity. In this structure, the responsivity is enhanced by the microcavity effect and the dark current is reduced thanks to the antenna effect. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e1f039503ca51eadace783d07d7d88c
https://doi.org/10.1109/irmmw-thz.2019.8874290