An initial version of a photon-photon resonance model for PICS3D has been implemented in the 2026beta version. This is a late addition that will not be included in our upcoming 2025 stable release but is available for testing by interested customers with an active maintenance contract.

A new presentation on CCD simulation using Crosslight APSYS has been uploaded.

An update to our PCSEL models has been released for the 2025 beta version of PICS3D. This update allows for the calculation of the coupling coefficients using either a 3D unit cell or a simplified 2D index profile generated from the 3D unit cell. This information can be used for a full device simulation using existing sliver models.

Interested users should contact Crosslight for a demo.

Crosslight Software is proud to celebrate its 30th anniversary.

Crosslight is pleased to announce the successful implementation of a feature allowing users to import or impose any temperature distribution before or during the electrical simulation. This feature is useful because sometimes temperature profile can be obtained experimentally or from a different thermal simulator and some TCAD users may wish to avoid the complication of a full self-consistent thermal-electrical simulation. With a known temperature profile, electrical and optical simulation can be made much easier.

Users of Crosslight with such a need can contact Crosslight for v25 beta.

Crosslight is pleased to announce the successful implementation of an improved algorithm to perform simulations that include self-heating. In compound semiconductor, many material parameters are sensitive to temperature and such temperature sensitivity causes simulation to diverge from time to time in the default method where there is strong coupling between electrical and thermal equations.

To avoid the possible frustration caused by divergence due to thermal coupling, it is desirable to have the option of
decoupling the thermal and electrical simulations without too much of a loss in accuracy. As shown in this example, the split step causes some minor noise in the simulation IV/LI curves without altering the general behavior.

Users affected by thermal divergence problems are encouranged to contact Crosslight for the 2025 beta version.

With the popularity of quantum well electro-absorption modulators (EAM) in photonic systems, we see increased interest and demand for MQW EAM TCAD simulations.
Crosslight MQW EAM TCAD offers advanced simulation capability based on physical models for free carrier, many-body, and exciton effects.
Exciton simulation is the most efficient approach and its results are close to the experimental absorption values.

With version 2025 of Crosslight TCAD, modeling of quantum well EAM will have more accurate models of the behavior of such systems.
The new models include a temperature-dependent scattering time as well as a temperature-dependent ratio between the bound exciton and
its free-carrier counterpart.

The new models are based on the following reference: “Thermodynamics of excitons in semiconductors,” James P. Wolfe, Phys. Today 35(3), 46 (1982); doi:10.1063/1.2914968

Customers of Crosslight TCAD simulating quantum EAM are invited to evaluate the latest versions.

A new presentation on Triplet-Triplet Fusion Diffusion in OLED has been posted on our LED application page. This model is available in the 2025 beta version of APSYS and is available for trial for customers with an up-to-date maintenance agreement.