Microscopic origin of the Drude-Smith model
Tyler L. Cocker,Tyler L. Cocker,D Baillie,M. Buruma,Lyubov V. Titova,Richard Sydora,Frank Marsiglio,Frank A. Hegmann +7 more
TLDR
In this paper, it was shown that the terahertz conductivity of a structurally confined Drude gas of electrons is actually suppressed at low frequencies due to carrier confinement on the diffusion length scale and not due to backscattering.Abstract:
Terahertz spectroscopy of nanomaterials is one of the most active areas of terahertz physics thanks to its ability to reveal charge-carrier confinement on length scales of tens to hundreds of nanometers. Structural confinement modifies the experimental complex conductivity, such that it is Drude-like at high frequencies but suppressed at low frequencies. This response is often described as a consequence of carrier backscattering off nanoparticle boundaries and modeled using the sometimes controversial Drude-Smith formula. In this paper, it is demonstrated that the terahertz conductivity of a structurally confined Drude gas of electrons is actually suppressed at low frequencies due to carrier confinement on the diffusion length scale and not due to backscattering. A new conductivity formula is derived based on diffusion that is found to be very similar to the Drude-Smith conductivity formula, thereby explaining many of the previous successes of the Drude-Smith model.read more
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Nature of Photon
Ilgaitis Prūsis,Peteris Prūsis +1 more
TL;DR: In this article, the basic features of the photon, such as wave-particle duality, the relation between a continuous electromagnetic wave and a quanta, the interaction of electric and magnetic fields, space of photon, speed of light are explained.
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Nanoscale terahertz scanning probe microscopy
TL;DR: In this article, a survey of terahertz scanning probe microscopy techniques that achieve spatial resolution on the scale of micrometres to angstroms is presented, with particular emphasis on their overarching approaches and underlying probing mechanisms.
Journal ArticleDOI
Dynamical Control over Terahertz Electromagnetic Interference Shielding with 2D Ti3C2Ty MXene by Ultrafast Optical Pulses.
Guangjiang Li,Naaman Amer,Hassan A. Hafez,Shuohan Huang,Dmitry Turchinovich,Vadym Mochalin,Frank A. Hegmann,Lyubov V. Titova +7 more
TL;DR: It is demonstrated that ultrafast optical pulses with wavelengths straddling the visible range induce transient broadband THz transparency in the MXene that persists for nanoseconds and is independent of temperature from 95 K to 290 K.
Journal ArticleDOI
Equilibrium and non-equilibrium free carrier dynamics in 2D Ti 3 C 2 T x MXenes: THz spectroscopy study
Guangjiang Li,Kateryna Kushnir,Yongchang Dong,Sergii Chertopalov,Apparao M. Rao,Vadym Mochalin,Ramakrishna Podila,Lyubov V. Titova +7 more
TL;DR: In this article, the authors report on equilibrium and non-equilibrium free carrier dynamics of 2D transition metal carbides, nitrides and carbonitrides gleaned from THz spectroscopic studies for the first time.
Journal ArticleDOI
Terahertz Spectroscopy of Emerging Materials
Jacob A. Spies,Jens Neu,Uriel T. Tayvah,Matt D. Capobianco,Brian Pattengale,Sarah Ostresh,Charles A. Schmuttenmaer +6 more
TL;DR: In this paper, terahertz (THz) spectroscopy has become an established technique for studying the dielectric and transient photoconductive properties of materials and has been used extensively in the past few decades.
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Nature of Photon
Ilgaitis Prūsis,Peteris Prūsis +1 more
TL;DR: In this article, the basic features of the photon, such as wave-particle duality, the relation between a continuous electromagnetic wave and a quanta, the interaction of electric and magnetic fields, space of photon, speed of light are explained.