Widely Tunable Optical and Thermal Properties of Dirac Semimetal Cd${}_3$As${}_2$

Abstract

In this paper we report a detailed analysis of the temperature-dependent optical properties of epitaxially grown cadmium arsenide (Cd${}_3$As${}_2$), a newly discovered three-dimensional Dirac semimetal. Dynamic Fermi level tuning -- instigated from Pauli-blocking in the linear Dirac cone -- and varying Drude response, generate large variations in the mid and far-infrared optical properties. We demonstrate thermo-optic shifts larger than those of traditional III-V semiconductors, which we attribute to the obtained large thermal expansion coefficient as revealed by first-principles calculations. Electron scattering rate, plasma frequency edge, Fermi level shift, optical conductivity, and electron effective mass analysis of Cd${}_3$As${}_2$ thin-films are quantified and discussed in detail. Our ab initio density functional study and experimental analysis of epitaxially grown Cd${}_3$As${}_2$ promise applications for nanophotonic and nanoelectronic devices, such as reconfigurable metamaterials and metasurfaces, nanoscale thermal emitters, and on-chip directional antennas.

References in corpus (25)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Graphene Spintronics
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Experimental Realization of a Three-Dimensional Dirac Semimetal
• Negative Thermal Expansion Coefficient of Graphene Measured by Raman Spectroscopy
• Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
• Charge Transport in Weyl Semimetals
• Giant negative magnetoresistance induced by the chiral anomaly in individual Cd3As2 nanowires
• Cd3As2 is Centrosymmetric
• A High-Performance Mid-infrared Optical Switch Enabled by Bulk Dirac Fermions in Cd3As2
• Ultrafast Broadband Photodetectors based on Three-dimensional Dirac Semimetal Cd3As2
• Temperature-dependent optical properties of gold thin films
• Chiral anomaly and optical absorption in Weyl semimetals
• Optical Signatures of Weyl Points in TaAs
• Room-temperature chiral charge pumping in Dirac semimetals
• 3D Dirac semimetal Cd3As2: A review of material properties
• Interband optical conductivity of the [001]-oriented Dirac semimetal Cd3As2
• 3D Dirac cone carrier dynamics in Na3Bi and Cd3As2
• Terahertz Probe of Photoexcited Carrier Dynamics in Dirac Semimetal Cd3As2
• Optical phonon dynamics and electronic fluctuations in the Dirac semimetal Cd3As2
• Enhanced Thermoelectric Properties of Dirac Semimetal Cd3As2
• Excitonic Gap Formation in Pumped Dirac Materials
• Excitonic instability in optically-pumped three-dimensional Dirac materials
• Optical spectroscopy study on pressure-induced phase transitions in the three-dimensional Dirac semimetal Cd${}_3$As${}_2$

Cited by in corpus (8)

• Subwavelength grating waveguide filter based on cladding modulation with phase-change material grating
• Terahertz Polarization Conversion from Optical Dichroism in a Topological Dirac Semimetal
• Phonon softening near topological phase transitions
• Tracking ultrafast change of multiterahertz broadband response functions in a photoexcited Dirac semimetal Cd${}_3$As${}_2$ thin film
• Theory for Cd${}_3$As${}_2$ thin films in the presence of magnetic fields
• Enhanced Dirac node separation in strained Cd3As2 topological semimetal
• Anomalous electronic energy relaxation and soft phonons in the Dirac semimetal Cd${}_3$As${}_2$
• Linear-in-Frequency Optical Conductivity over a broad range in the three-dimensional Dirac semimetal candidate Ir${}_2$In${}_8$Se