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Forbidden Light

Stability by fluctuation: topological materials outperform through quantum periodic motion

Applying vibrational motion in a periodic manner may be the key to preventing dissipations of the desired electron states that would make advanced quantum computing and spintronics possible.




Terahertz Driven Superconductivity

X. Yang, C. Vaswani, C. Sundahl, M. Mootz, L. Luo, J. H. Kang, I. E. Perakis, C. B. Eom, J. Wang, "Lightwave-Driven Gapless Superconductivity and Forbidden Quantum Beats by Terahertz Symmetry Breaking," Nature Photonics, DOI: 10.1038/s41566-019-0470-y (2019).

Probing and Controlling Topological Surface States




New tuning knob using ultra-broadband pump photon energy from THz to visible
for both controlling Terahertz conductivity and isolating surface from the bulk contribution.


Uncover new state of matter hidden by superconductivity



We reveal a long-lived gaplessquantum phase of quasiparticles with coherent transport and quantum memory.

Carrier Transport during Solar Energy Generation Using THz Eyes



The initial exciton dynamics, dark states, and coherence of hybrid organic-inorganic perovskites are revealed by broadband THz pulses.


Ultrafast terahertz probes of interacting dark excitons in chirality-specificsemiconducting single-walled carbon nanotubes

Liang Luo, Aaron Patz, Ioannis Chatzakis, and Jigang Wang, Phys.Rev.Lett. 114, 107402 (2015)



Metamaterials Shine Bright as New Terahertz Source

Liang Luo, Aaron Patz, Ioannis Chatzakis, and Jigang Wang, Phys.Rev.Lett. 114, 107402 (2015)

Highlight MM THz



Efficient Broadband THz Generation from Split-Ring-Resonator Metamaterials

Liang Luo, Ioannis Chatzakis, Jigang Wang Thomas Koschny, and Costas M. Soukoulis Fabian B.P. Niesler and MartinWegener

Highlights clip



Ultrafast observation of critical nematic fluctuations and giant magnetoelastic coupling in iron pnictides

Aaron Patz, Tianqi Li, Sheng Ran, Rafael M. Fernandes, Joerg Schmalian, Sergey L. Bud'ko, Paul C. Canfield, Ilias E. Perakis & Jigang Wang Nature Communications, 5:3229, (2014) doi: 10.1038/ncomms4229



Broadband terahertz generation from metamaterials

Liang Luo, Ioannis Chatzakis, Jigang Wang, Fabian B. P. Niesler, Martin Wegener, Thomas Koschny, and Costas M. Soukoulis Nature Communications, 5:3055, (2014) doi: 10.1038/ncomms4055



Our research is selected in "Optics in 2013"

Jigang Wang, Tianqi Li, Aaron Patz, Ilias E. Perakis, Leonidas Mouchliadis, Jiaqiang Yan and Thomas A. Lograsso




One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves

Ioannis Chatzakis, Philippe Tassin, Liang Luo, Nian-Hai Shen, Lei Zhang, Jigang Wang, Thomas Koschny, and C. M. Soukoulis Appl. Phys. Lett. 103, 043101 (2013) (Cover image)



Quantum tricks drive magnetic switching into the fast lane

All-optical switching promises terahertz-speed hard drive and RAM memory.

Researchers at the U.S. Department of Energy's Ames Laboratory, Iowa State University, and the University of Crete in Greece have found a new way to switch magnetism that is at least 1000 times faster than currently used in magnetic memory technologies. Magnetic switching is used to encode information in hard drives, magnetic random access memory and other computing devices. The discovery, reported in the April 4 issue of Nature, potentially opens the door to terahertz (1012 hertz) and faster memory speeds.



Femtosecond Switching of Magnetism via Strongly Correlated Spin-Charge Quantum Excitations

Tianqi Li, Aaron Patz, Leonidas Mouchliadis, Jiaqiang Yan, Thomas A. Lograsso, Ilias E. Perakis, and Jigang Wang Nature 496 69-73 (04 April 2013)



Iowa State, Ames Laboratory researchers find new properties of the carbon material graphene

Findings could have applications in high-speed communications fields



Femtosecond Population Inversion and Stimulated Emission of Dense Dirac Fermions in Graphene

T. Li, L. Luo, M. Hupalo, J. Zhang, M. C. Tringides, J. Schmalian and J. Wang Phys. Rev. Lett. 108, 167401 (2012)



Laser pulses could get spinning nanomagnets to increase speed of storage and computation devices

Findings could have applications in high-speed communications fields