Light Collection / Injection for STEM
The Mönch is an advanced add-on designed for efficient light collection and injection in Scanning Transmission Electron Microscopy (STEM).
About our Light Collection / Injection for STEM
The Mönch add-on is a unique tool that can operate in either light collection or light injection mode, thanks to its specific mirror design. In addition, the flexibility of the add-on allows an external coupling either in free space or via an optical fiber.
In light-collection mode, it achieves a high signal-to-noise ratio through:
- An independently moving mirror guaranteeing access to any region of interest of the sample
- A proprietary high-NA mirror compatible with small pole piece gaps (down to 5 mm)
- A precise sub-micrometer alignment for a perfect adjustment of the mirror with respect to the sample
- A reduced working distance of 300 µm for highest efficiency
- A patented optical fiber preserving brightness and spectral resolution
In light-injection mode, it offers:
- A <10 micron-sized beam for localized sample excitation
- Compatibility with a wide range of lasers
Connect a Light Collection / Injection for STEM
The mirror operates independently of the sample holder, providing flexibility and ease of alignment with both the electron beam and the sample. This design also allows free sample displacement, enabling the scanning of larger surface areas.
The Mönch arm can be fully retracted from the sample area, making it compatible with virtually all standard STEM options, such as EDS, HAADF, and other detectors. It is also fully compatible with and complementary to EELS analysis.
Light collection is achieved through a patented asymmetric, broadband multicore fiber that preserves the field of view, collection efficiency, and spectral resolution.
The system can be easily swapped between light collection (CL) mode and light injection mode for maximum flexibility in the user's workflow.
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