1. Low vibration high numerical aperture automated variable temperature Raman microscope
- Author
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Juan Gabriel Ramírez, Isaac Henslee, Christian Urban, John Schneeloch, Gavin B. Osterhoudt, Anjan Reijnders, Ruidan Zhong, Genda Gu, Kenneth S. Burch, Ilya Valmianski, and Yao Tian
- Subjects
Phase transition ,Physics - Instrumentation and Detectors ,Materials science ,Microscope ,FOS: Physical sciences ,02 engineering and technology ,01 natural sciences ,law.invention ,symbols.namesake ,law ,0103 physical sciences ,Thermal ,010306 general physics ,Instrumentation ,Condensed Matter - Materials Science ,business.industry ,Materials Science (cond-mat.mtrl-sci) ,Instrumentation and Detectors (physics.ins-det) ,021001 nanoscience & nanotechnology ,Polarization (waves) ,Vibration ,Hysteresis ,symbols ,Optoelectronics ,Raman microscope ,0210 nano-technology ,business ,Raman spectroscopy - 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
- Published
- 2016
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