Efficient metallic spintronic emitters of ultrabroadband terahertz radiation

Ultrashort pulses covering the 1–30 THz range are generated from a W/CoFeB/Pt trilayer and originate from photoinduced spin currents, the inverse spin Hall effect and a broadband Fabry–Perot resonance. The resultant peak fields are several 100 kV cm–1.

[1]  P. Taday,et al.  Terahertz pulsed spectroscopy and imaging in the pharmaceutical setting ‐ a review , 2007, The Journal of pharmacy and pharmacology.

[2]  R Gebs,et al.  Terahertz emission from lateral photo-Dember currents , 2010, 2010 Conference Proceedings ICECom, 20th International Conference on Applied Electromagnetics and Communications.

[3]  Kaijun Mu,et al.  High-power THz to IR emission by femtosecond laser irradiation of random 2D metallic nanostructures , 2015, Scientific Reports.

[4]  J. Pearson,et al.  Quantifying spin Hall angles from spin pumping: experiments and theory. , 2009, Physical review letters.

[5]  Roberto Morandotti,et al.  Generation of Intense Terahertz Radiation via Optical Methods , 2011, IEEE Journal of Selected Topics in Quantum Electronics.

[6]  E. K. Stone,et al.  THz generation from plasmonic nanoparticle arrays. , 2011, Nano letters.

[7]  E. Hendry,et al.  Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy , 2011 .

[8]  G. Walsh.  TERAHERTZ RADIATION , 2001 .

[9]  Xuemei Zheng,et al.  Organic Broadband Terahertz Sources and Sensors , 2007 .

[10]  Stephan Winnerl,et al.  Scalable Microstructured Photoconductive Terahertz Emitters , 2012 .

[11]  Jean-Louis Coutaz,et al.  Study of terahertz radiation generated by optical rectification on thin gold films. , 2005, Optics letters.

[12]  S. Katsumoto,et al.  Terahertz radiation emission from GaMnAs , 2006 .

[13]  J. Sinova,et al.  Spin Hall effects , 2015 .

[14]  Xiang Zhang,et al.  Terahertz optical rectification from 〈110〉 zinc‐blende crystals , 1994 .

[15]  A. Hoffmann.  Spin Hall Effects in Metals , 2013, IEEE Transactions on Magnetics.

[16]  P. Günter,et al.  A hydrogen-bonded organic nonlinear optical crystal for high-efficiency terahertz generation and detection. , 2008, Optics express.

[17]  Xiang Zhang,et al.  Terahertz emission from laser-induced microplasma in ambient air , 2015 .

[18]  K. Unterrainer,et al.  Dynamically phase-matched terahertz generation. , 2012, Optics letters.

[19]  F. Tauser,et al.  Generation and field-resolved detection of femtosecond electromagnetic pulses tunable up to 41 THz , 2000 .

[20]  Xinan Liang,et al.  Optical constant of CoFeB thin film measured with the interference enhancement method , 2015 .

[21]  R. J. Bell,et al.  Optical properties of Al, Fe, Ti, Ta, W, and Mo at submillimeter wavelengths. , 1988, Applied optics.

[22]  Masayoshi Tonouchi,et al.  Cutting-edge terahertz technology , 2007 .

[23]  G. Grüner.  Millimeter and Submillimeter Wave Spectroscopy of Solids , 1998 .

[24]  J. Mangeney,et al.  20 THz broadband generation using semi-insulating GaAs interdigitated photoconductive antennas. , 2014, Optics express.

[25]  F. Freimuth,et al.  Terahertz spin current pulses controlled by magnetic heterostructures. , 2012, Nature nanotechnology.

[26]  Prashanth C. Upadhya,et al.  Ultrabroadband terahertz radiation from low-temperature-grown GaAs photoconductive emitters , 2003 .

[27]  Zhang Xi,et al.  Materials for terahertz science and technology , 2003 .

[28]  Xi-Cheng Zhang,et al.  Investigation of ultra-broadband terahertz time-domain spectroscopy with terahertz wave gas photonics , 2014 .

[29]  H. Willis,et al.  The far infra-red spectrum of crystalline polytetrafluoroethylene , 1974 .

[30]  Wai Lam Chan,et al.  Imaging with terahertz radiation , 2007 .

[31]  Tony F. Heinz,et al.  Terahertz Radiation from Semiconductors , 2004 .

[32]  Xuemei Zheng,et al.  Broadband and gap-free response of a terahertz system based on a poled polymer emitter-sensor pair , 2005 .

[33]  D. Hirashima,et al.  Giant orbital Hall effect in transition metals: origin of large spin and anomalous Hall effects. , 2008, Physical review letters.

[34]  F. Freimuth,et al.  Anisotropic spin Hall effect from first principles. , 2010, Physical review letters.

[35]  K. Tsen.  Ultrafast dynamical processes in semiconductors , 2004 .

[36]  M. Battiato,et al.  Superdiffusive spin transport as a mechanism of ultrafast demagnetization. , 2010, Physical review letters.

[37]  Lyubov V. Titova,et al.  An ultrafast terahertz scanning tunnelling microscope , 2013, Nature Photonics.

[38]  Martin Koch,et al.  Ultra-broadband THz time-domain spectroscopy of common polymers with THz air-photonics , 2014, 2014 Conference on Lasers and Electro-Optics (CLEO) - Laser Science to Photonic Applications.

[39]  P. Planken,et al.  Percolation-enhanced generation of terahertz pulses by optical rectification on ultrathin gold films. , 2011, Optics letters.

[40]  R. Freeman,et al.  Nonlinear Optics: Basic Concepts , 1991 .

[41]  C. Vicario,et al.  Off-resonant magnetization dynamics phase-locked to an intense phase-stable terahertz transient , 2013, Nature Photonics.

[42]  Tobias Kampfrath,et al.  Sampling of broadband terahertz pulses with thick electro-optic crystals , 2007 .

[43]  D. Grischkowsky,et al.  Terahertz conductivity of thin metal films , 2008 .

[44]  A. Thomas,et al.  Accessing the fundamentals of magnetotransport in metals with terahertz probes , 2015, Nature Physics.

[45]  V. Zhukov,et al.  Lifetimes and inelastic mean free path of low-energy excited electrons in Fe, Ni, Pt, and Au: Ab initio GW+T calculations , 2006 .

[46]  Georg Woltersdorf,et al.  Spin Hall voltages from a.c. and d.c. spin currents , 2013, Nature Communications.

[47]  Eiji Saitoh,et al.  Conversion of spin current into charge current at room temperature: Inverse spin-Hall effect , 2006 .

[48]  S. Hunsche,et al.  Detectors and sources for ultrabroadband electro-optic sampling: Experiment and theory , 1999 .

[49]  K. Nelson,et al.  Resonant and nonresonant control over matter and light by intense terahertz transients , 2013, Nature Photonics.

[50]  M Unlu,et al.  Significant performance enhancement in photoconductive terahertz optoelectronics by incorporating plasmonic contact electrodes. , 2013, Nature communications.

[51]  N. T. Hunt,et al.  Terahertz-pulse emission by laser excitation of surface plasmons in a metal grating , 2007, 2007 Joint 32nd International Conference on Infrared and Millimeter Waves and the 15th International Conference on Terahertz Electronics.

[52]  P. Planken,et al.  Emission of terahertz pulses from nanostructured metal surfaces , 2014 .

[53]  Megan R. Leahy-Hoppa,et al.  Modeling a broadband terahertz system based on an electro-optic polymer emitter-sensor pair , 2006 .

[54]  Vasilis Apostolopoulos,et al.  THz emitters based on the photo-Dember effect , 2014 .

[55]  P. Yeh,et al.  Optical Waves in Layered Media , 1988 .

[56]  Xin Zhang,et al.  Terahertz-field-induced insulator-to-metal transition in vanadium dioxide metamaterial , 2012, Nature.

[57]  T. Elsaesser,et al.  Generation of single-cycle THz transients with high electric-field amplitudes. , 2005, Optics letters.

[58]  T. Elsaesser,et al.  Broadband phase-matched difference frequency mixing of femtosecond pulses in GaSe: Experiment and theory , 1999 .

[59]  G. Gallot,et al.  Electro-optic detection of terahertz radiation , 1999 .

[60]  V. Roddatis,et al.  Ultrafast transport of laser-excited spin-polarized carriers in Au/Fe/MgO(001). , 2011, Physical review letters.

[61]  K. Reimann.  Table-top sources of ultrashort THz pulses , 2007 .

[62]  A. Taylor,et al.  High-Power Broadband Terahertz Generation via Two-Color Photoionization in Gases , 2012, IEEE Journal of Quantum Electronics.

[63]  Hartmut G. Roskos,et al.  Broadband THz emission from gas plasmas induced by femtosecond optical pulses: From fundamentals to applications , 2007 .

[64]  P. Ajayan,et al.  Imaging molecular adsorption and desorption dynamics on graphene using terahertz emission spectroscopy , 2014, Scientific Reports.

[65]  R. Morandotti,et al.  Generation of 1.5 microJ single-cycle terahertz pulses by optical rectification from a large aperture ZnTe crystal. , 2007, Optics express.

[66]  Hiromasa Ito,et al.  Ultrabroadband terahertz generation using 4-N,N-dimethylamino- 4′ -N′ -methyl-stilbazolium tosylate single crystals , 2010 .

[67]  Mathias Kläui,et al.  Current-induced domain wall motion in nanoscale ferromagnetic elements , 2011 .