Investigating Transitions of Transition Metal Doped Materials at Wavelengths Close to 1550nm for Quantum Information Applications

Z. Noble, K. Olson, A.D. Marsh, P.J.T. Woodburn, C.W. Thiel, and R.L. Cone

The energy level structure and relaxation dynamics of transition metal ions doped into crystal and semiconductor host materials were investigated using optical spectroscopic techniques to identify materials with transitions in the 1.5 micron telecommunication wavelength band for quantum information science (QIS) and photonic signal processing. Emerging applications in QIS, such as quantum memories, require materials that provide optical and spin transitions with long lifetimes, narrow linewidths, and ultra-low quantum decoherence, particularly at telecom wavelengths compatible with existing optical fiber networks. Past research into materials for these applications has focused on rare-earth ions doped into crystals due to their well-established and well-understood properties. These traditional materials, however, are often incompatible with existing chip-scale integrated optical and electronic architectures. In contrast, transition metal ions can be readily incorporated into many existing semiconductor materials ideally suited for the fabrication of integrated devices.  With that motivation, we conducted a large-scale spectroscopic investigation of the infrared optical transitions of transition metal ions in a range of potential materials. Absorption and fluorescence spectroscopy were used to investigate materials such as Fe:LiNbO3 at temperatures down to 4K to identify promising transition metal ion and crystal host material combinations with narrow linewidths near 1.5 microns. The fluorescence lifetimes and quantum decoherence of selected materials were investigated using techniques such as time-dependent fluorescence and photon echoes to investigate the compatibility of these materials with quantum device applications. These studies identified several promising material systems and demonstrated that some of the previously unexplored ions can offer transitions in technologically important wavelength ranges.

Additional Abstract Information

Presenter: Zoe Noble

Institution: Montana State University Bozeman

Type: Oral

Subject: Physics/Astronomy

Status: Approved

Time and Location

Session: Oral 9
Date/Time: Wed 12:00pm-1:00pm
Session Number: 937
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