RAMBO-II: Ultrabroadband Optical Spectroscopy of Materials in Magnetic Fields Up to 50 T

Study of a material’s optical properties in high magnetic fields is often complicated by the size, construction, and availability of magnets with excellent optical access. The chief aim of RAMBO – the Rice Advanced Magnet with Broadband Optics – is to enable a wide variety of ultrafast and nonlinear spectroscopy measurements not possible or prohibitively difficult in large DC or pulsed magnet systems by constructing multiple compact, mini-coil-based table-top pulsed magnets with excellent optical access. RAMBO-I has already been used for terahertz time-domain spectroscopy

in pulsed magnetic fields of up to 30 Tesla, and RAMBO-II will expand these capabilities by not only increasing the maximum field strength but also widening the spectral range into the midinfrared, near-infrared (NIR), visible (VIS), and extreme ultraviolet. The centerpieces of the RAMBO-II expansion are a series of 50-T magnets, which will be the strongest known table-top, repetitive pulsed magnets applied to similar experiments. This presentation features the completed NIR/VIS magnet system along with its experimental capabilities and field-dependent photoluminescence of the NV^- center in diamond.

F. Tay, A. Baydin, F. Katsutani, and J. Kono, “Magneto-optical Spectroscopy with RAMBO: A Table-Top 30 T Magnet,” Journal of the Physical Society of Japan 91, 101006 (2022)

A. Baydin, T. Makihara, N. Marquez Peraca, and J. Kono, “Time-Domain Terahertz Spectroscopy in High Magnetic Fields,” Frontiers of Optoelectronics 14, 110 (2021)