remUCPS - rate equation model of upconversion dynamics including photonic structure effects

Abstract

The remUCPS library provides an object-oriented implementation of a rate equation model, describing the upconversion dynamics in the upconverter Erbium in the host crystal NaYF4. Additonally, the model features the effects of a photonic structure, currently implemented as a Bragg structure, on the upconversion dynamics.

The local energy density is calculated via an implementation of the [transfer materix method](https://zenodo.org/record/1344878#.X3GOr3UzZhE). The local density of optical states is calculated using [MIT Photonic Bands](https://doi.org/10.1364/OE.8.000173). The change in upconversion dynamics due to these two photonic effects can be investigated using remUCPS.

The remUCPS code has been developed at Fraunhofer Institute for Solar Energy Systems ISE (Germany). All publications that led up to the current version are listed below. The current version of the model is extensively described in [Hofmann, Eriksen et al. 2018] (https://doi.org/10.1364/OE.26.007537), as are the contributions of all prior publications.

The code can be used and adapted by anyone wanting to simulate photonic effects on upconversion or also just an upconversion process on its own.

Among the most important parameters that can be scanned in the rate equation model are the design wavelength of the Bragg structure, the excitation wavelength, the angle of incidence and the incident irradiance.

Have fun playing around! Contact: clarissa.hofmann@ise.fraunhofer.de