Low vibration high numerical aperture automated variable temperature Raman microscope

Abstract

Raman micro-spectroscopy is well suited for studying a variety of properties and has been applied to wide- ranging areas. Combined with tuneable temperature, Raman spectra can offer even more insights into the properties of materials. However, previous designs of variable temperature Raman microscopes have made it extremely challenging to measure samples with low signal levels due to thermal and positional instability as well as low collection efficiencies. Thus, contemporary Raman microscope has found limited applicability to probing the subtle physics involved in phase transitions and hysteresis. This paper describes a new design of a closed-cycle, Raman microscope with full polarization rotation. High collection efficiency, thermal and mechanical stability are ensured by both deliberate optical, cryogenic, and mechanical design. Measurements on two samples, Bi2Se3 and V2O3, which are known as challenging due to low thermal conductivities, low signal levels and/or hysteretic effects, are measured with previously undemonstrated temperature resolution.

11 pages, 13 figures

References in corpus (18)

• The Raman Fingerprint of Graphene
• Inelastic Light Scattering From Correlated Electrons
• p-type Bi2Se3 for topological insulator and low temperature thermoelectric applications
• Scattering Continuum and Possible Fractionalized Excitations in $\alpha$-RuCl${}_3$
• Two Energy Scales and two Quasiparticle Dynamics in the Superconducting State of Underdoped Cuprates
• Electrodynamics of the vanadium oxides VO2 and V2O3
• Optical characterization of Bi${}_2$Se${}_3$ in a magnetic field: infrared evidence for magnetoelectric coupling in a topological insulator material
• Crystal Symmetry Breaking in Few-Quintuple Bismuth Telluride Films: Applications in Nanometrology of Topological Insulators
• Sharp Raman Anomalies and Broken Adiabaticity at a Pressure Induced Transition from Band to Topological Insulator in Sb2Se3
• Temperature dependence of Raman-active optical phonons in Bi_2Se_3 and Sb_2Te_3
• A Raman Study of Morphotropic Phase Boundary in PbZr1-xTixO3 at low temperatures
• Fabrication and Characterization of Topological Insulator Bi${}_2$Se${}_3$ Nanocrystals
• Optical evidence of surface state suppression in Bi based topological insulators
• Raman study of the phonon symmetries in BiFeO${}_3$ single crystals
• Dynamic conductivity scaling in photoexcited V2O3 thin films
• Stability of exfoliated Bi${}_2$Sr${}_2$Dy${}_x$Ca${}_{1-x}$Cu${}_2$O${}_{8+\delta }$ studied by Raman microscopy
• Local phonon mode in thermoelectric Bi2Te2Se from charge neutral antisites
• AFM and Raman studies of topological insulator materials subject to argon plasma etching

Cited by in corpus (12)

• Possible Structural Transformation and Enhanced Magnetic Fluctuations in Exfoliated $\alpha$-RuCl${}_3$
• Axial Higgs Mode Detected by Quantum Pathway Interference in RTe3
• The range of non-Kitaev terms and fractional particles in RuCl${}_3$
• Uncovering Electron-Phonon Scattering and Phonon Dynamics in Type-I Weyl Semimetals
• Evidence for dominant phonon-electron scattering in Weyl semimetal WP${}_2$
• Evidence of a coupled electron-phonon liquid in NbGe${}_2$
• A Cleanroom in a Glovebox
• Ultrafast loss of lattice coherence in the light-induced structural phase transition of V${}_2$O${}_3$
• Uncovering the Hidden Ferroaxial Density Wave as the Origin of the Axial Higgs Mode in RTe${}_3$
• Enhanced Ferromagnetism in Monolayer Cr2Te3 via Topological Insulator Coupling
• Signatures of non-Loudon-Fleury Raman scattering in the Kitaev magnet $\beta$-Li${}_2$IrO${}_3$
• Direct Evidence for Fermi Statistics from Proximity to the Kitaev Spin Liquid in RuCl3