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  Terahertz electro-absorption effect enabling femtosecond all-optical switching in semiconductor quantum dots

Hoffmann, M. C., Monozon, B. S., Livshits, D., Rafailov, E. U., & Turchinovich,b, D. (2010). Terahertz electro-absorption effect enabling femtosecond all-optical switching in semiconductor quantum dots. Applied Physics Letters, 97(23): 231108. doi:10.1063/1.3515909.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0028-1C3C-B Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0028-1C3D-9
Genre: Journal Article

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© American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
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http://dx.doi.org/10.1063/1.3515909 (Publisher version)
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 Creators:
Hoffmann, Matthias C.1, 2, Author           
Monozon, B. S.3, Author
Livshits, D.4, Author
Rafailov, E. U.5, Author
Turchinovich,b, D.6, Author
Affiliations:
1Condensed Matter Dynamics Division, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173637              
2CFEL, 22607 Hamburg, Germany, ou_persistent22              
3Department of Physics, State Marine Technical University, Lotsmanskaya 3, 190008 St. Petersburg, Russia, ou_persistent22              
4Innolume GmbH, Konrad-Adenauer-Allee 11, 44263 Dortmund, Germany, ou_persistent22              
5School of Engineering, Physics, and Mathematics, University of Dundee, Dundee DD1 4HN, United Kingdom, ou_persistent22              
6DTU Fotonik - Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark, ou_persistent22              

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Free keywords: Quantum dots; Electric fields; Optical absorption; III-V semiconductors; Reflectivity
 Abstract: We demonstrate an instantaneous all-optical manipulation of optical absorption in InGaAs/GaAs quantum dots(QDs) via an electro-absorption effect induced by the electric field of an incident free-space terahertz signal. A terahertz signal with the full bandwidth of 3 THz was directly encoded onto an optical signal probing the absorption in QDs, resulting in the encoded temporal features as fast as 460 fs. The instantaneous nature of this effect enables femtosecond all-optical switching at very high repetition rates, suggesting applications in terahertz-range wireless communication systems with data rates of at least 0.5 Tbit/s.

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Language(s): eng - English
 Dates: 2010-09-242010-10-252010-12-082010-12-06
 Publication Status: Issued
 Pages: 3
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1063/1.3515909
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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 97 (23) Sequence Number: 231108 Start / End Page: - Identifier: Other: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223