---
title: "Energy-momentum cathodoluminescence imaging used for probing topological silicon photonic lattices: new paper"
description: A new study demonstrated how hyperspectral angle-resolved (energy-momentum) cathodoluminescence can be used to probe topological silicon photonic lattices.
image: https://blog.delmic.com/hubfs/angler-resolved%20CL.png
---

###### [cathodoluminescence](https://blog.delmic.com/news/topic/cathodoluminescence), [SPARC](https://blog.delmic.com/news/topic/sparc), [paper review](https://blog.delmic.com/news/topic/paper-review) • 1

# Energy-momentum cathodoluminescence imaging used for probing topological silicon photonic lattices: new paper

[Delmic April 23, 2019](https://blog.delmic.com/news/author/delmic)

![angler-resolved CL](https://blog.delmic.com/hs-fs/hubfs/angler-resolved%20CL.png?width=1080&name=angler-resolved%20CL.png)

The new paper, which was published in Physical Review Letters, studies two-dimensional hexagonal photonic lattices of silicon Mie resonators with a topological optical band structure in the visible spectral range.

The local optical density of states is mapped with deep subwavelength resolution, and the results show evidence of topological edge states at the domain walls between topological and trivial lattices.

Topological photonic materials open new ways to route information for communication and computing purposes. Nanostructures with topological phases of light potentially allow lossless photon transport in large-scale optical integrated circuits. The paper examines two-dimensional photonic lattices operating in the visible spectral range.

To probe the optical properties of the photonic lattices modes, hyperspectral angle-resolved (energy-momentum) cathodoluminescence imaging was employed, which combines high-resolution spectral data with angular data. The measurements were performed with [the SPARC cathodoluminescence detector.](https://www.delmic.com/sparc-cathodoluminescence-sem)

The results of the paper demonstrate the feasibility to realize practical silicon-based topological geometries that are comparable with planar Si-based integrated optics technology, and to excite them locally with electron beams. If you would like to read the full paper, [go here.](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.117401) To learn more about the possibilities of hyperspectral angle-resolved technique, register for the [upcoming webinar.](https://app.livestorm.co/p/685d229e-86c2-4012-9ae2-1bdfa0cf7da0)

#### Delmic

[![](https://blog.delmic.com/hs-fs/hubfs/2022_Delmic_M%26M%20Meeting%20Promo_Website.png?width=380&name=2022_Delmic_M%26M%20Meeting%20Promo_Website.png) ](https://blog.delmic.com/news/join-delmic-at-microscopy-microanalysis-mm-meeting-2022) [###### cathodoluminescence

## Join Delmic at Microscopy & MicroAnalysis (M&M) Meeting 2022

It’s official, Delmic is going to M&M 2022 in Portland, Oregon! You’ll find us at the biggest microscopy event of the year. We’ll be presenting our METEOR, ...

](https://blog.delmic.com/news/join-delmic-at-microscopy-microanalysis-mm-meeting-2022)

[![](https://blog.delmic.com/hs-fs/hubfs/Website/News/2022_CL_OTP%20Funding_Website.png?width=380&name=2022_CL_OTP%20Funding_Website.png) ](https://blog.delmic.com/news/open-technology-programme-funding) [###### cathodoluminescence

## Open Technology Programme (OTP) funding

We are delighted to announce that Delmic - CL Solutions is a part of the Open Technology Programme, granted by NWO. The project will look into a new ...

](https://blog.delmic.com/news/open-technology-programme-funding)

[![](https://blog.delmic.com/hs-fs/hubfs/Website/News/2022_CL_NWO%20Funding_Website.png?width=380&name=2022_CL_NWO%20Funding_Website.png) ](https://blog.delmic.com/news/nwo-funding-for-perovskite-solar-foil-consortium) [###### cathodoluminescence

## NWO funding for perovskite solar foil consortium

We are excited to announce that Delmic - CL Solutions will be part of the PerFoRM (Perovskite Foils by Roll-to-roll Manufacturing) consortium, funded by NWO's ...

](https://blog.delmic.com/news/nwo-funding-for-perovskite-solar-foil-consortium)