Versatile setup for optical spectroscopy under high pressure and low temperature

Article Article scientifique Article Versatile setup for optical spectroscopy under high pressure and low temperature eng 2015 author Tran Michaël 565761 author Levallois Julien 686018 author Akrap Ana 742935 author Teyssier Jérémie 0000-0002-7590-2987 604738 author Kuzmenko Alexey 0000-0001-9574-6435 135384 author Levy Florence 671621 author Tediosi Riccardo 585383 author Brandt Mehdi Paul 591917 author Lerch Philippe 24098 author Van Der Marel Dirk 0000-0001-5266-9847 135104 105102 10.1063/1.4931990 0034-6748 http://scitation.aip.org/content/aip/journal/rsi/86/10/10.1063/1.4931990 We present an optical setup for spectroscopic measurements in the infrared and of Raman shift under high pressure and at low temperature. Using a membrane-driven diamond anvil cell, the pressure can be tuned in situ up to 20 GPa and the temperatures ranges from room temperature down to 18 K in transmission mode and 13 K in reflection mode. In transmission, the setup is entirely working under vacuum to reduce the water absorption features and obtain a higher spectral stability. Since the infrared throughput obtained with a thermal source is limited, the use of a synchrotron source allowed to enhance the performance, as illustrated with results obtained with various materials. The analysis of the reflectivity is adapted so that it benefits from ambient pressure data and produces quantitative optical conductivity curves that can be easily compared to the results at ambient pressure. High Pressure Infrared Raman Synchrotron Dewey 500.2 Swiss National Science Foundation 200020 CH Swiss National Science Foundation 135085 CH 33 Département de physique de la matière quantique 131 false 1364 Groupe Kuzmenko 785 Groupe Van der Marel Review of scientific instruments 86 10 9c15f9ed-f1a7-4589-af33-68805cf43d56 Article (Published version) Public 1.4931990.pdf 2525702 application/pdf openAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Versatile setup for optical spectroscopy under high pressure and low temperature	Review of scientific instruments			2015	1,366	110

Archive ouverte UNIGE

Brandt, Mehdi Paul