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Mönch

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).

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Characteristics

About our Light Collection / Injection for STEM

The Mönch add-on is a unique tool that can operate in either a 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 mirror with precise alignment for 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
  • The ability to perform simultaneous light injection and collection
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Features

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 solution is delivered with software natively designed to support script commands, enabling user-defined automation.

Trusted by top semiconductor companies and prestigious research institutes worldwide

Applications

Related Applications Using the Mönch Add-On

Discover how the Allalin platform can support your research.

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GaN
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SiC
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Process development
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Materials Science
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Micro/Nanowire
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GaN device
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Power electronics
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Life Science
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Optoelectronics
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Application

Resolving individual quantum emitters in GaN-AlN superlattice nanowires

We show how CL-STEM can be used for highly localized optical characterization of quantum emitters
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Application

Correlating structural and optical properties of lead halide perovskites

We will introduce CL-STEM as a complementary technique to other in-STEM characterization methods for identifying the physical origin of lead halide perovskite optical properties.

Scientific references

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Effect of buffer layer thickness on recombination in zincblende InGaN/GaN quantum wells XU, Xiuyuan, DYER, Daniel, FRENTRUP, Martin, et al. Journal of Physics D: Applied Physics 2025
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Effect of a Band-Gap Gradient on the Radiative Losses in the Open-Circuit Voltage of Solar Cells S.Gharabeiki, F.Lodola, T.schaaf et al PRX Energy 4, 033006 2025
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Point Defect Induced Potential Wells across the m‐Plane of Core/Shell GaN Nanowires REZAIE, Saghar, KUSCH, Gunnar, SAMUELSON, Lars, et al. physics status solids (RRL)–Rapid Research Letters , vol. 19, no 9, p. 2500145. 2025
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Strong and Weak Coupling Nanophysics with Free Electron Beams KOCIAK, Mathieu, LI, Xiaoyan, AUAD, Yves, et al. Advanced Optical Materials, p. e01548. 2025
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Scientific references

View all references
Liquid-phase sintering of lead halide perovskites and metal-organic framework glasses Hou J, Chen P, Shukla A, Krajnc A, Wang T, Li X, Doasa R, Tizei LHG, Chan B, Johnstone DN, Lin R, Schülli TU, Martens I, Appadoo D, Ari MS, Wang Z, Wei T, Lo SC, Lu M, Li S, Namdas EB, Mali G, Cheetham AK, Collins SM, Chen V, Wang L, Bennett TD Science, 2021 Oct 29;374(6567):621-625 2021
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Nanoscale modification of WS2 trion emission by its local electromagnetic environment BONNET, N., LEE, H.Y., SHAO, F., WOO, S.Y., BLAZIT, J.-D., WATANABE, K., TANIGUCHI, T., ZOBELLI, A., STEPHAN, O., KOCIACK, M., GRADECAK-GARAJ, S., TIZEI, L.H.G. Nano Lett., 2021, 21, 24, 10178–10185 2021
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Time-Resolved Cathodoluminescence in an Ultrafast Transmission Electron Microscope MEURET, Sophie, TIZEI, L.H.G., HOUDELLIER, F., WEBER, S., AUAD, Y., TENCE, M., CHANG, H.-C., KOCIACK, M., ARBOUET, A. Appl. Phys. Lett., 2021, vol. 119, 062106 2021
doi
Probing plasmonic excitation mechanisms and far-field radiation of single-crystalline gold tapers with electrons LINGSTADT, R., TALEBI, N., GUO, S., SIGLE, W., CAMPOS, A., KOCIACK, M., ESMANN, M., BECKER, S. F., OKUNISHI, E., MUKAI, M., LIENAU, C., VAN AKEN, P. A. Phil. Trans. R. Soc. A, 2020, 378, 20190599 2020
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Ready to revolutionize your materials characterization approach?

Get in touch with us today to discover how our state-of-the-art cathodoluminescence tools can elevate your research and industry applications.
Already more than 30 systems installed globally!
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