Nanoscience Instruments is proud to partner with Delmic, offering innovative correlative light and electron microscopy solutions. We strive to offer our customers integrated systems that offer superior performance and user friendliness.
The Delmic SPARC is a high performance cathodoluminescence (CL) system, offering a modular design to yield superior results. Key features contribute to these benefits, including:
The high precision mirror staging is designed for ease of use with minimal interference. The stage has micropositioning capability, providing:
- Automated alignment using accurate and reproducible micropositioning
- Minimum interference with other SEM techniques
- High collection efficiency due to enhanced reflectivity with unprecedented sensitivity for faster measurements with reduced artifacts
- Ease of use as mirror is removable and may easily be cleaned
The automated mirror stage allows for highly efficient hyperspectral imaging in addition to other advanced imaging modes.
The SPARC system has a modular design and is upgradable. Optical plates, filters, polarizers, and other components can be customized for a variety of applications.
The Delmic SPARC utilizes an integrated light source for automated calibration of spectrograph with CL system.
The SPARC CL was designed for ease of use. In addition to the automated alignment, fully retractable mirror and calibrated light source, the software user interface allows for straightforward data acquisition and analysis. For example, when using Polarization mode imaging, the raw Fourier image is directly displayed as a polar plot.
Software features include:
- Simultaneous acquisition of the SEM with either spectral or angle-resolved images
- Select grid and pixel size for CL images
- Apply correction files with a single click
- Open source
- Widget plugins available
Spectral imaging is the traditional and most common technique for cathodoluminescence measurements. A spectral image is created when a scanning electron microscope (SEM) rasters the electron beam across a sample, detecting light over a single or narrow range of wavelengths. A hyperspectral image is created when the radiation is detected over a range of distinguishable wavelengths, shown schematically:
Schematic of hyperspectral imaging with the Delmic SPARC cathodoluminescence (CL) system
Angle-resolved CL spectroscopy projects the image from the mirror to a camera. By detecting the directionality of the emitted light, also referred to as momentum spectroscopy, angle-resolved CL images are collected. A filter wheel is used to spectrally distinguish the emission wavelengths.
Applications for angle-resolved CL imaging include plasmonic nanoantennas and photonic crystals.
Using a polarizer or polarimeter in the angle-resolved mode allows for the reconstruction of the polarization state (Stokes vector) of CL for different emission angles. An advanced correction for the optical system including the paraboloid mirror is required for this reconstruction and is provided with the polarization mode option.