Title :

Spintronic terahertz emitters with integrated metallic terahertz cavities

Author(s) :

Mičica, Martin [Auteur]
Nano-THz
Wright, Adrien [Auteur]
Nano-THz
Koleják, Pierre [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
IT4Innovations - National Supercomputing Center [Ostrava]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]
Lezier, Geoffrey [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Postava, Kamil [Auteur]
IT4Innovations - National Supercomputing Center [Ostrava]
Hawecker, Jacques [Auteur]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
de Vetter, Anna [Auteur]
Nano-THz
Tignon, Jérôme [Auteur]
Nano-THz
Mangeney, Juliette [Auteur]
Nano-THz
Jaffrès, Henri [Auteur]
Laboratoire Albert Fert (ex-UMPhy Unité mixte de physique CNRS/Thales)
Lebrun, Romain [Auteur]
Laboratoire Albert Fert (ex-UMPhy Unité mixte de physique CNRS/Thales)
Thales Research and Technology [Palaiseau]
Tiercelin, Nicolas [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Vanwolleghem, Mathias [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]
Dhillon, Sukhdeep [Auteur]
Nano-THz

Journal title :

Nanophotonics

Pages :

9 pages

Publisher :

De Gruyter

Publication date :

2024-03-01

ISSN :

2192-8614

English keyword(s) :

THz spintronic emitters
THz time domain spectroscopy
metallic resonator

HAL domain(s) :

Physique [physics]
Sciences de l'ingénieur [physics]

English abstract : [en]

Spintronic terahertz emitters (STEs), based on optical excitation of nanometer thick ferromagnetic/heavy metal (FM/HM) heterojunctions, have become important sources for the generation of terahertz (THz) pulses. However, ...
Show more >Spintronic terahertz emitters (STEs), based on optical excitation of nanometer thick ferromagnetic/heavy metal (FM/HM) heterojunctions, have become important sources for the generation of terahertz (THz) pulses. However, the efficiency of the optical-to-THz conversion remains limited. Although optical techniques have been developed to enhance the optical absorption, no investigations have studied the application of THz cavities. Here, to enhance the THz efficiency of STEs in a selected THz spectral range, FM/HM structures are realized on ultra-thin sapphire layers with metallic mirrors to create λ /4 THz resonant cavities. THz emission time domain spectroscopy of these STE/sapphire/mirror heterostructures, with sapphire thicknesses ranging from 110 µm to 25 µm, shows enhancement of the emitted THz field that fits the λ /4 cavity resonance with up to a doubling of the field in the spectrum, and in agreement with temporal simulations of the emitted THz pulse. By taking advantage of birefringent materials, we further show the potential of control of the polarization state of the emitted THz pulse. This work shows the potential of enhancing and engineering THz emission from STEs using THz cavities that can be controlled over a broad spectral range, which can be easily combined with optical cavities.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Emetteurs TeRAhertz sPIntronic amélioréS par poinTe pour révéler la dynamique ultrarapide à l'échelle nanométrique
Towards spin-based THz technology

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL