| Autor: |
Stefan Nolte, M. Voitsch, Gunther Notni, Stefan Riehemann, Rico Hohmuth, B. Pradarutti, Andreas Tünnermann, Gabor Matthäus, Wolfgang Richter |
| Přispěvatelé: |
Publica |
| Jazyk: |
angličtina |
| Rok vydání: |
2008 |
| Předmět: |
|
| Popis: |
A large-area terahertz emitter based on an interdigital finger electrode photoconductive switch on low-temperature grown GaAs attached to a hexagonal microlens array is demonstrated. The hexagonal arranged microlenses direct the incident IR excitation pulses into specified electrode gaps, resulting in constructive interference in the terahertz far field. Using a Ti:sapphire oscillator running at 80 MHz with 150 fs pulses, 6.5 mu m THz average power at 540 mW optical excitation is obtained. The maximum IR-to-terahertz conversion efficiency achieved is >= 1.35x10(-5). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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