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

T-SPINDEX aims to develop a prototype THz time-domain reflectivity spectrometer using a spintronic emitter for rapid, precise, and user-friendly measurement of material refractive indices.

Subsidie
€ 150.000
2024

Projectdetails

Introduction

Electromagnetic radiation in the terahertz (THz) frequency range (0.3-30 THz) is a powerful tool for material spectroscopy and characterization in a contact-free, non-ionizing, and non-destructive way.

Applications

An essential application is the contact-free measurement of the complex-valued reflectivity and, ideally, refractive index of materials. Such knowledge is crucial in condensed-matter research for characterization of:

  1. The conduction-electron concentration and scattering in semiconductors
  2. Optical phonons in insulators
  3. Magnons in antiferromagnets

This knowledge is also important in various applied settings.

Requirements

Ideally, THz reflectivity measurements should meet the following requirements:

  1. Ultrawideband (covering two decades from 0.3 to 30 THz)
  2. User-friendly
  3. High precision and low noise

However, current approaches do not fulfill these requirements.

Project Goal

The goal of T-SPINDEX is to build a prototype THz time-domain reflectivity spectrometer to determine the THz refractive index of materials rapidly.

Innovative Solution

Features (1)-(3) are achieved altogether by using an innovative laser-driven coherent THz source, a spintronic THz emitter.

Financiële details & Tijdlijn

Financiële details

Subsidiebedrag€ 150.000
Totale projectbegroting€ 150.000

Tijdlijn

Startdatum1-7-2024
Einddatum31-12-2025
Subsidiejaar2024

Partners & Locaties

Projectpartners

  • FREIE UNIVERSITAET BERLINpenvoerder

Land(en)

Germany

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