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Laser-based high-field Terahertz source for time-resolved study of matter and hard x-ray pulses

English title Laser-based high-field Terahertz source for time-resolved study of matter and hard x-ray pulses
Applicant Hauri Christoph
Number 146769
Funding scheme Project funding (Div. I-III)
Research institution Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Other disciplines of Physics
Start/End 01.10.2013 - 30.09.2016
Approved amount 213'550.00
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All Disciplines (2)

Discipline
Other disciplines of Physics
Condensed Matter Physics

Keywords (8)

Terahertz laser; single-cycle THz pulse; hard x-ray pulse characterization; carrier envelope phase control; ultrafast magnetization; catalytic reaction; optical rectification; organic crystal

Lay Summary (German)

Lead
Die Erzeugung von starken Laserpulsen im Terahertz Frequenzbereich, und insbesondre zwischen 1-20 THz, ist eine grosse Herausforderung in der Laserphysik. Die besonderen Eigenschaften solcher THz Pulse macht sie interessant fuer Anwendungen in Physik, Chemie, Biologie und Medizin. Im Unterschied zu Roentgen- oder UV Strahlen ist die Terahertzstrahlung nicht ionisierend, und kann daher als "kalter" Laser aufgefasst werden. Dies eroeffnet neuartige Untersuchungsmoeglichkeiten.
Lay summary
Unser Ziel ist es, eine extrem starke und dennoch kompakte Terahertzquelle zu entwickeln, die sich dafuer eignet, neuartige Phaenomene an verschiedenen Materialien zu beobachten, die bis anhin nicht beobachtbar waren. Insbesondre wird uns dieser Terahertzlaser neue Techniken erlauben, wie wir bestimmte Materialeigenschaften innerhalb von sehr kurzer Zeit reversibel veraendern koennen, ohne dass das Material seine Eigenschaften verliert. Als Beispiel werden wir einen kurzen Terahertzblitz verwenden, um eine magnetische Domaene umzuschalten. Solche Prozesse werden gebraucht, um Informationen auf Speichermedien zu schreiben. Der Schreibprozess ist heutzutage relativ langsam und kann mit der zu untersuchenden Methode um Groessenordnungen beschleunigt werden. Unsere Terahertzquelle basiert auf einer Frequenzkonversion in organischen Salzkristallen.
Direct link to Lay Summary Last update: 30.08.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Comparison of Thermal Detector Arrays for Off-Axis THz Holography and Real-Time THz Imaging
Hack Erwin, Valzania Lorenzo, Gaeumann Gregory, Shalaby Mostafa, Hauri Christoph P., Zolliker Peter (2016), Comparison of Thermal Detector Arrays for Off-Axis THz Holography and Real-Time THz Imaging, in SENSORS, 16(2), 1.
Intense THz source based on BNA organic crystal pumped at Ti:sapphire wavelength
Shalaby Mostafa, Vicario Carlo, Thirupugalmani Karunanithi, Brahadeeswaran Srinivasan, Hauri Christoph P. (2016), Intense THz source based on BNA organic crystal pumped at Ti:sapphire wavelength, in OPTICS LETTERS, 41(8), 1777-1780.
Low frequency terahertz-induced demagnetization in ferromagnetic nickel
Shalaby Mostafa, Vicario Carlo, Hauri Christoph P. (2016), Low frequency terahertz-induced demagnetization in ferromagnetic nickel, in APPLIED PHYSICS LETTERS, 108(18), 1.
Simultaneous electronic and the magnetic excitation of a ferromagnet by intense THz pulses
Shalaby Mostafa, Vicario Carlo, Hauri Christoph P. (2016), Simultaneous electronic and the magnetic excitation of a ferromagnet by intense THz pulses, in NEW JOURNAL OF PHYSICS, 18, 1.
Air nonlinear dynamics initiated by ultra-intense lambda-cubic terahertz pulses
Shalaby Mostafa, Hauri Christoph P. (2015), Air nonlinear dynamics initiated by ultra-intense lambda-cubic terahertz pulses, in APPLIED PHYSICS LETTERS, 106(18), 1.
Air Nonlinearity triggered by an ultra-intense sub-5 THz light bullet
Shalaby Mostafa, Hauri Christoph P. (2015), Air Nonlinearity triggered by an ultra-intense sub-5 THz light bullet, in 2015 40TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ), 1.
Demonstration of a low-frequency three-dimensional terahertz bullet with extreme brightness
Shalaby Mostafa, Hauri Christoph P. (2015), Demonstration of a low-frequency three-dimensional terahertz bullet with extreme brightness, in Nature Communications, 6, 1.
Extreme Terahertz brightness by focusing to a lambda-cubic volume
Shalaby Mostafa, Hauri Christoph P. (2015), Extreme Terahertz brightness by focusing to a lambda-cubic volume, in 2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), 1.
Extreme Terahertz brightness by focusing to a lambda-cubic volume
Shalaby Mostafa, Hauri Christoph P. (2015), Extreme Terahertz brightness by focusing to a lambda-cubic volume, in 2015 40TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ), 1.
High-performing nonlinear visualization of terahertz radiation on a silicon charge-coupled device
Shalaby Mostafa, Vicario Carlo, Hauri Christoph P. (2015), High-performing nonlinear visualization of terahertz radiation on a silicon charge-coupled device, in NATURE COMMUNICATIONS, 6, 1.
Spectrally intense terahertz source based on triangular Selenium
Shalaby Mostafa, Hauri Christoph P. (2015), Spectrally intense terahertz source based on triangular Selenium, in SCIENTIFIC REPORTS, 5, 1.
Temporal and spectral shaping of broadband terahertz pulses in a photoexcited semiconductor
Shalaby Mostafa, Peccianti Marco, Cooke David G., Hauri Christoph P., Morandotti Roberto (2015), Temporal and spectral shaping of broadband terahertz pulses in a photoexcited semiconductor, in APPLIED PHYSICS LETTERS, 106(5), 1.
Terahertz light bullet-induced nonlinearity in a gold thin film
Shalaby Mostafa, Vicario Carlo, Hauri Christoph P. (2015), Terahertz light bullet-induced nonlinearity in a gold thin film, in 2015 40TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ), 1.
Terahertz magnetic modulator based on magnetically clustered nanoparticles
Shalaby Mostafa, Peccianti Marco, Ozturk Yavuz, Al-Naib Ibraheem, Hauri Christoph P., Morandotti Roberto (2014), Terahertz magnetic modulator based on magnetically clustered nanoparticles, in APPLIED PHYSICS LETTERS, 105(15), 1.

Communication with the public

Communication Title Media Place Year
Media relations: print media, online media CCD as THz imager International 2015
Media relations: print media, online media CCD-Sensor erfasst Terahertzstrahlung International 2015
Media relations: print media, online media Gentle terahertz light International 2015
Media relations: print media, online media High-performing nonlinear visualization of terahertz radiation International 2015
Media relations: print media, online media Ins rechte Licht gerückt International 2015
Media relations: print media, online media Megapixel CCD Can See Terahertz International 2015
Media relations: print media, online media PSI boosts terahertz source, allowing cheaper visualization International 2015
Media relations: print media, online media Put in Perspective International 2015
Media relations: print media, online media Seeing terahertz with megapixel CCD devices International 2015
Media relations: print media, online media Terahertz laser light focused to the extreme International 2015
Media relations: print media, online media Terahertz-Detektion mit CCD-Sensoren International 2015
Media relations: print media, online media Terahertzlicht – bessere Visualisierung mit handelsüblichen Sensoren International 2015
Media relations: print media, online media The Most Powerful Terahertz Pulse Ever Generated International 2015
Media relations: print media, online media Un sensore CCD capace di rilevare le onde THz International 2015

Awards

Title Year
Marie Curie Fellowship (PSI-Cofund) 2014

Associated projects

Number Title Start Funding scheme
164051 Ultrafast light modulator driven by strong and tunable THz field 01.02.2016 Bilateral programmes
162129 High-Power Ultra-Broadband and Narrowband THz Photonics Based on Molecular Crystals 01.01.2016 Bilateral programmes
133840 High power femtosecond amplifier system for THz science,coherent soft x-ray generation, imaging applications and seeding of a Free Electron Laser 01.03.2011 R'EQUIP

Abstract

A pulsed high-field Terahertz (THz) source with one single cycle or less is a novel tool for exploring nonlinear phenomena in solids, gases and on surfaces. The development of a high-peak power THz laser is motivated by the great potential for initiating ultrafast dynamics in various fields of research like ultrafast magnetisation, THz surface chemistry, high-order harmonic generation and Free Electron Laser physics. For many investigations THz could play a fundamental role and may answer open questions. For example, how fast can the magnetization vector be coherently controlled by an external pulsed magnetic field? Is it possible to trigger adsorption of a CO molecule on a surface by excitation of the stretch-bend mode? Could the efficiency of high-order harmonic generation be significantly improved by THz-assisted quasi-phase matching? Can we characterize few-femtosecond hard x-ray pulses from a Free Electron Laser with the THz streaking techniques and measure their arrival time at the experiment? For all such investigations a table-top high-field THz source in the so-called THz gap (0.1 to 15 THz) would be uttermost beneficial. The production of pulses at highest peak-fields (several MV/cm) in the THz gap has been challenging in the past. The goal of this proposal is to overcome the current limitation of state-of-the-art table-top THz sources, to push the technology further towards larger bandwith (1-15 THz) and higher fields and to perform cutting edge nonlinear THz experiments in solids and gas phase. The THz source developed within the frame of this project is going to be used to investigate the magnetic dynamics in ferromagnetic materials and others. Deeper insights into those phenomena could help to make next generation storage media much faster since we are aiming to coherent control the magnetization dynamics directly by the THz magnetic field rather than by conventional heating induced by an intense femtosecond laser pulse. Another application cover novel photon beam diagnostics for hard x-ray femtosecond lasers, like Free Electron Lasers (FELs) or table-top soft x-ray lasers, where the strong THz field is used as streaking field for photo-electrons to reconstruct the temporal pulse shape and arrival time. In fact, the pulse reconstruction of femtosecond hard x-ray pulses at the future Swiss Free Electron Laser and determination of its arrival time at the experiment is still a challenging problem which could be solved with a laser-based THz streak camera.
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