Low-noise, rapid and ultrabroadband terahertz time-domain ellipsometry enabled by spintronic terahertz emitters

Informazioni relative al progetto

T-SPINDEX

ID dell’accordo di sovvenzione: 101123255

DOI

10.3030/101123255

Progetto chiuso

Data della firma CE 23 Febbraio 2024

Data di avvio 1 Luglio 2024

Data di completamento 31 Dicembre 2025

Finanziato da

• European Research Council (ERC)

Costo totale

Nessun dato

Contributo UE

€ 150 000,00

Coordinato da

FREIE UNIVERSITAET BERLIN
Germany

Periodic Reporting for period 1 - T-SPINDEX (Low-noise, rapid and ultrabroadband terahertz time-domain ellipsometry enabled by spintronic terahertz emitters)

Periodo di rendicontazione: 2024-07-01 al 2025-12-31

Sintesi del contesto e degli obiettivi generali del progetto

Electromagnetic radiation in the terahertz (THz) range is a crucial tool for spectroscopy and material characterization, offering a contact-free, non-ionizing and non-destructive means of analyzing materials to determine their reflectivity and refractive index. It finds use in both condensed matter research and practical applications. However, current approaches to THz reflectivity measurements fall short of meeting desired criteria like being ultra-broadband, user-friendly, precise and low-noise. The ERC-funded T-SPINDEX project aims to address this gap by developing a prototype THz time-domain reflectivity spectrometer capable of swiftly determining materials’ THz refractive index. The project will leverage an innovative laser-driven coherent THz source, specifically a spintronic THz emitter.

Lavoro eseguito dall’inizio del progetto fino alla fine del periodo coperto dalla relazione e principali risultati finora ottenuti

We developed a spintronic emitter with polarization modulation of ~100 kHz, thereby allowing for low-noise THz field measurements.
We tested new materials in terms of spintronic THz emission.
We conducted ellipsometry measurements with a spintronic emitter as THz light source.

Progressi oltre lo stato dell’arte e potenziale impatto previsto (incluso l’impatto socioeconomico e le implicazioni sociali più ampie del progetto fino ad ora)

We demonstrated a new functionality of spintronic terahertz emitters. They are emitters with a high degree of linear polarization (~1% field) and are, thus, well suited as light sources for ellipsometry.