Online-Seminar "Win the Quantum Materials Race: Extract New Information (Quickly) with Temperature-Dependent Raman and Photoluminescence"
Thursday 14th May 2020 - h. 16:00 - 17:00 CEST
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Raman micro-spectroscopy is used to characterize a variety of properties, including chemical, magnetic, electronic, symmetry, and layer orientation in 2D materials. Many interesting phenomena emerge across the 4K-500K temperature range, and new information about a sample can be obtained with temperature dependent measurements.
We demonstrate efficient hyperspectral mapping of 2D materials with a micro-Raman spectroscopy and photoluminescence platform that maintains high spatial resolution and collection efficiency across the entire temperature range (4K – 500K). The system overcomes challenges associated with variable temperature sample drift by incorporating a low thermal mass sample stage, in-vacuum high NA objective, and coupling optics to a low astigmatism, broadband spectrograph.
Tailoring 2D semiconductor heterostructures with specific bandgaps is a key aspect of leveraging new quantum materials for electronics and optoelectronics. The basic heterostructure assembly principle is simple: exfoliate, for example, a monolayer of MoS2, put it on top of another mono- or few- layer crystal, c.a. WS2, add another 2D crystal, and so on. The resulting heterostructure represents an artificial material assembled in a specified sequence with single layer precision, held together by van der Waals forces.
Speaker: Craig Wall, Ph.D. - Applications Lab Manager, Montana Instruments
Montana Instruments® Corporation designs and manufactures high-precision electrical, optical, and cryogenic systems for quantum materials research and the quantum computing, sensing, and networking industries. The company’s solutions are focused on increasing productivity by re-defining automation, precision, and environmental control of wide temperature experimental platforms. The company specializes in providing intuitive, accessible, and easy-to-use systems that accelerate the pace of research and innovation.
