Cathodoluminescence imaging on quartz in sandstone

Studying optical nanoantennas: customer story from Chalmers University of Technology

Posted by Delmic on Jun 18, 2018 12:15:00 PM

One of the applications of cathodoluminescence is studying optical nanoantennas. But what are they exactly? These devices, made usually from noble metals (gold or silver, for example) or from semiconductor materials, are capable of amplifying and manipulating light on the nanoscale.
Dr. Ruggero Verre is one the Delmic’s oldest customers: he is a post-doctoral researcher in the Department of Applied Physics at the Chalmers University of Technology in Gothenburg, Sweden. Optical nanoantennas is the focus of his research group, headed by Prof. Mikael Käll.

One way to study the properties of the antennas and understand how they work is by characterizing them with cathodoluminescence. The group of Ruggero Verre has been using the SPARC cathodoluminescence detector to study them, and they have achieved some interesting results.

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Topics: nanophotonics, SPARC, cathodoluminescence, semiconductors, cathodoluminescence sem, customer story


Possibilities of the SPARC for time-resolved cathodoluminescence

Posted by Delmic on Mar 13, 2018 9:19:40 AM

What is a time-resolved cathodoluminescence? How can it be applied in different fields? In the new video Toon Coenen, application specialist at Delmic, gives an explanation of this imaging technique.

 

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Topics: cathodoluminescence sem, SPARC, cathodoluminescence, video, cathodoluminescence video, time-resolved cathodoluminescence, optical modules


3 outstanding advantages of the SPARC cathodoluminescence system (video)

Posted by Delmic on Jan 31, 2018 2:31:10 PM

In this short video about the SPARC our application specialist Toon Coenen talks about the main three advantages of this cathodoluminescence system. What are the possibilies of the SPARC and why cathodoluminescence is gaining poplarity in various scientific fields? Find out from the video!

 

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Topics: cathodoluminescence sem, SPARC, cathodoluminescence, video, cathodoluminescence video


A high-performance cathodoluminescence system with one-of-a-kind features: The SPARC

Posted by Kaitlin van Baarle on Apr 10, 2017 3:22:02 PM

Characterization at the nanoscale is becoming increasingly important as new discoveries are made and structures are developed at smaller scales. Optical characterization alone is not sufficient to study materials at a scale smaller than the wavelength of light, and electron microscopy results in limited data. This is an issue faced by scientists in fields ranging from materials science to the geosciences. 

This is why DELMIC has developed the SPARC cathodoluminescence (CL) system, which is designed to fit on a scanning electron microscope and detect CL emission using any of available five imaging modes. The SPARC is unmatched in terms of its unique features and high performance, and is recommended for any researcher that wants to keep pace with the competitive scientific community.

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Topics: cathodoluminescence


Cathodoluminescence intensity mapping: Adding an extra dimension to your research

Posted by Noor van der Veeken on Dec 8, 2016 11:00:00 AM

Those who understand the basic mechanisms of cathodoluminescence (CL) know that it is essentially a useful byproduct of electron microscopy. Fast electrons that are fired at a material cause it to become excited, thereby emitting photons of characteristic wavelengths. CL intensity measurement is one of the many useful methods using CL emission to obtain valuable information about your sample complementary to other techniques such as SE, BSE, EBSD or EDS.

This article further explains how CL intensity mapping exactly works and how it can be employed in various types of research.

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Topics: materials science, cathodoluminescence


Glowing yellow calcite and green aragonite: Cathodoluminescence sheds light in geosciences

Posted by Kaitlin van Baarle on Sep 14, 2016 2:00:00 PM

In the nineteenth century, before the development of modern technology as we know it now, vacuum tubes were widely used to study the fundamental properties of materials and objects. During this period, William Crookes, the inventor of the vacuum tube, was studying various objects with these tools. At the time, scientists were unsure of the exact processes that were occurring, but in these vacuum tubes electrons were essentially being fired at objects at the end of the vacuum tube. These electrons excited the materials which caused them to produce light when they returned back to their equilibrium state, a process known as cathodoluminescence (CL). This process is still being used in geology as well as other scientific fields, albeit with much more complex and efficient technology. To this day, CL is an extremely useful tool in the geosciences and is experiencing a resurgence in popularity with the ability to integrate it with a scanning electron microscope [2].

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Topics: cathodoluminescence, materials science


From the discovery of the electron to subwavelength microscopy: An introduction to cathodoluminescence

Posted by Kaitlin van Baarle on Jul 1, 2016 11:53:08 AM

In 1897, the electron was discovered by Sir Joseph John Thomson. The physicist and eventual Nobel Prize winner was in fact conducting research on “cathode rays”. At the time, cathode rays were only known as the consequence of an electric current that was passed through a vacuum tube. It was observed that electrically charged particles would collide with atoms at the end of the tube and excite them, thus causing them to fluoresce, or emit fluorescent light. It was further made evident that these were rays travelling in a straight line from one end of the tube to the next, by placing a shape in the middle of the tube and observing that very shape casting a shadow at the end of the tube.

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Topics: materials science, cathodoluminescence