Room-temperature self-powered energy photodetector based on optically induced Seebeck effect in Cd<sub>3</sub>As<sub>2</sub>

Yavarishad, Niloufar; Hosseini, Tahereh; Kheirandish, Elaheh; Weber, Carsten; Kouklin, N.

doi:10.7567/apex.10.052201

Cited by 25 publications

(21 citation statements)

References 12 publications

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“…[219][220][221][222][223][224] In this context, first steps have been made to create ultra-fast broadband photo-detectors as well as mid-infrared optical switches based on Cd 3 As 2 . [225][226][227] Cd 3 As 2 hosts all necessary promising properties that already make graphene an attractive photosensitive material, while it offers the further huge advantage that it interacts with light way better due to its 3D nature. Photodetectors based on a Au-Cd 3 As 2 -Au architecture exhibit an ultrafast photocurrent response of 6.9 ps, which is one order of magnitude faster than commercially available state-of-the-art systems.…”

Section: Optical Propertiesmentioning

confidence: 99%

Chemical Principles of Topological Semimetals

2018

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PrefaceThe recent rapid development in the field of topological materials raises expectations that these materials might allow solving a large variety of current challenges in condensed matter science, ranging from applications in quantum computing, to infra-red sensors or heterogenous catalysis. 1-8 In addition, exciting predictions of completely new physical phenomena that could arise in topological materials drive the interest in these compounds. 9,10 For example, charge carriers might behave completely different from what we expect from the current laws of physics if they travel through topologically non-trivial systems. 11,12 This happens because charge carriers in topological materials can be different from the normal type of fermions we know, which in turn affects the transport properties of the material. It has also been proposed that we could even find "new fermions", i.e. fermions that are different from the types we currently know in condensed matter systems as well as in particle physics. 10 Such proposals connect the fields of high energy or particle physics, whose goal it is to understand the universe and all the particles it is composed of, with condensed matter physics, 1 arXiv:1804.10649v1 [cond-mat.mtrl-sci] 27 Apr 2018where the same type, or even additional types, of particles can be found as so-called quasiparticles, meaning that the charge carriers behave in a similar way as it would be expected from a certain particle existing in free space.The field of topology in condensed matter physics evolved from the idea that there can be insulators whose band structure is fundamentally different (i.e. has a different topology) from that of the common insulators we know. If two insulators with different topologies are brought into contact, electrons that have no mass and cannot be back scattered are supposed to appear at the interface. These edge states also appear if a topological insulator (TI) is in contact with air, a trivial insulator. 2D TIs have conducting edge states whereas 3D TIs, which were discovered later, have conducting surface states. TIs have already been reviewed multiple times, [13][14][15][16] which is why we focus here on the newer kind of topological materials, namely topological semimetals (TSMs). Nevertheless, we will refer to TIs and their properties where relevant in the context of topological materials and to contrast them with TSMs.The term "topological semimetal" is widely used and basically includes all semimetals that exhibit some non-trivial band topology. We will describe in more detail later in this review what non-trivial topology actually means. Since TSMs are semimetals they are characterized by a gap-less band structure, i.e. they differ from normal metals by being charge balanced, meaning the amount of electrons and holes contributing to their conductivity is exactly the same. Or, phrased differently, the hole and electron pockets composing the Fermi surface are of the same size.

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Section: Optical Propertiesmentioning

confidence: 99%

Chemical Principles of Topological Semimetals

2018

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“…In addition, the intriguing properties of high carrier mobility and linear dispersion of band energy make Cd 3 As 2 a potential candidate for optoelectronic applications in high-speed, broadband photodetectors, mid-infrared optical switches and modulators. 4,[23][24][25][26][27][28] Optical excitation with circularly-polarized light can induce a spin-polarized charge current due to the angular momentum selection rule, known as the circular photogalvanic effect (CPGE), while excitation with linearly-polarized light can generate a spin-unpolarized charge current, known as the linear photogalvanic effect (LPGE). 29,30 CPGE, as an optically-excited spin orientation transport effect, has been widely used to investigate the spin polarization nature in a variety of semiconductors, and to reveal their fundamental spin-orbit coupling physics and potential opto-spintronic device applications.…”

Section: Introductionmentioning

confidence: 99%

Strain-induced circular photogalvanic current in Dirac semimetal Cd₃As₂ films epitaxied on a GaAs(111)B substrate

Liang

Zhai

et al. 2022

Nanoscale

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“…It reveals properties of the hot electrons important in high-field devices. More directly, it can guide optoelectronic applications: recently several devices have been reported that rely on the ultrafast properties of Cd 3 As 2 , the archetypal three-dimensional Dirac semimetal, to make fast photodetectors 23,24 and optical switches. 25 The monopnictide Weyl materials TaAs, TaP, and NbAs also show technological promise due to their sizable, anisotropic nonlinear-optical response.…”

Section: Introductionmentioning

confidence: 99%

Similar ultrafast dynamics of several dissimilar Dirac and Weyl semimetals

Weber

Berggren

Masten

et al. 2017

Journal of Applied Physics

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Recent years have seen the rapid discovery of solids whose low-energy electrons have a massless, linear dispersion, such as Weyl, line-node, and Dirac semimetals. The remarkable optical properties predicted in these materials show their versatile potential for optoelectronic uses. However, little is known of their response in the picoseconds after absorbing a photon. Here we measure the ultrafast dynamics of four materials that share non-trivial band structure topology but that differ chemically, structurally, and in their low-energy band structures: ZrSiS, which hosts a Dirac line node and Dirac points; TaAs and NbP, which are Weyl semimetals; and Sr 1−y Mn 1−z Sb 2 , in which Dirac fermions coexist with broken time-reversal symmetry. After photoexcitation by a short pulse, all four relax in two stages, first sub-picosecond, and then few-picosecond. Their rapid relaxation suggests that these and related materials may be suited for optical switches and fast infrared detectors. The complex change of refractive index shows that photoexcited carrier populations persist for a few picoseconds.

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Room-temperature self-powered energy photodetector based on optically induced Seebeck effect in Cd₃As₂

Cited by 25 publications

References 12 publications

Chemical Principles of Topological Semimetals

Chemical Principles of Topological Semimetals

Strain-induced circular photogalvanic current in Dirac semimetal Cd₃As₂ films epitaxied on a GaAs(111)B substrate

Similar ultrafast dynamics of several dissimilar Dirac and Weyl semimetals

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Room-temperature self-powered energy photodetector based on optically induced Seebeck effect in Cd3As2

Cited by 25 publications

References 12 publications

Chemical Principles of Topological Semimetals

Chemical Principles of Topological Semimetals

Strain-induced circular photogalvanic current in Dirac semimetal Cd3As2 films epitaxied on a GaAs(111)B substrate

Similar ultrafast dynamics of several dissimilar Dirac and Weyl semimetals

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Room-temperature self-powered energy photodetector based on optically induced Seebeck effect in Cd₃As₂

Strain-induced circular photogalvanic current in Dirac semimetal Cd₃As₂ films epitaxied on a GaAs(111)B substrate