Researchers can now observe materials’ dynamic processes at a fine scale thanks to the Quantum Emitter Electron Nanomaterial Microscope, or QuEEN-M, a new platform available through the CNM user program. The instrument integrates an atomic-resolution scanning transmission electron microscope with capabilities including cathodoluminescence spectroscopy and ultrafast electron pulsing, enabling time-resolved studies with sub-nanometer spatial resolution, a combination previously difficult to achieve. A key feature is the Attolight CL system’s fiber-coupled parabolic mirror design, decoupled from the sample holder, offering a novel approach to signal collection. Future development will extend into near-atomic-resolution photon-induced near-field electron microscopy (PINEM), promising deeper insight into light, matter interactions and transient electromagnetic fields. QuEEN-M supports research spanning quantum information science, microelectronics, and materials science.
QuEEN-M Integrates STEM with Multimodal Spectroscopy Capabilities
The QuEEN-M platform, a new nanoscale imaging tool at the CNM, merges atomic-resolution scanning transmission electron microscopy with a suite of spectroscopic techniques to probe quantum and functional materials. Beyond conventional electron microscopy, the system incorporates cathodoluminescence, electron energy-loss, and energy-dispersive X-ray spectroscopies alongside 4D-STEM, allowing researchers to characterize materials with increased detail. A key advancement lies in the instrument’s ability to observe dynamic processes; a nanosecond electrostatic beam blanker and a picosecond RF-cavity-based ultrafast electron pulser facilitate time-resolved studies at sub-nanometer resolution. The integrated Attolight CL system utilizes a fiber-coupled parabolic mirror design, a configuration intended to optimize signal collection and minimize sample heating during analysis. Future upgrades will introduce mirror-coupled laser illumination for direct observation of light-induced changes in materials, extending QuEEN-M’s capabilities to the study of transient electromagnetic fields.
Researchers are now able to investigate material behavior at previously inaccessible timescales thanks to the integration of a picosecond RF-cavity-based ultrafast electron pulser with a probe-corrected STEM at the QuEEN-M facility. This combination delivers sub-nanometer spatial resolution and the capacity to observe dynamic processes across a broad range of temporal scales, a feat difficult to achieve with earlier instrumentation. The nanosecond electrostatic beam blanker complements the RF pulser, extending the range of observable phenomena.
The Quantum Emitter Electron Nanomaterial Microscope(QuEEN-M)is a next-generation platform for nanoscale cathodoluminescence (CL) imaging and ultrafast dynamic studies of quantum and functional materials, available through the CNM user program.
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