Efficient methods for simulating the interaction of electromagnetic waves with devices, It takes a tremendous amount of computer simulations to create a device like an MRI scanner that can image your brain by detecting electromagnetic waves propagating through tissue. The tricky part is figuring out how electromagnetic waves will react when they come in contact with the materials in the device.

The interaction of electromagnetic waves with devices, Now the SMU researchers have developed an algorithm that can used in a wide range of fields from biology and astronomy to military applications and telecommunications to create equipment more efficiently and accurately.

Currently, it can take days or months to do simulations. And because of cost, there is a limit to the number of simulations typically done for these devices. SMU math researchers have revealed a way to do a faster algorithm for these simulations with the help of grants from the U.S. Army Research Office and the National Science Foundation.

This work will also help create a virtual laboratory for scientists to simulate and explore quantum dot solar cells, which could produce extremely small, efficient and lightweight solar military equipment.

The algorithm could have significant implications in a number of scientific fields.

They include things like radio waves, microwaves, light and X-rays. Electromagnetic waves are also the reason you can use a mobile phone to talk to someone in another state and why you can watch TV. In short, they’re everywhere.

An engineer or mathematician would be able to use the algorithm for a device whose job is to pick out a certain electromagnetic wave. For instance, she or he could potentially use it to design a solar light battery that lasts longer and is smaller than currently exists.

To design a battery that is small in size, you need to optimize the material so that you can get the maximum conversion rate from the light energy to electricity, Researcher said. An engineer could find that maximum conversion rate by going through simulations faster with this algorithm.

Or the algorithm could help an engineer design a seismic monitor to predict earthquakes by tracking elastic waves in the earth, Cai noted.

Computer simulations map out how materials in a device like semiconductor materials will interact with light, in turn giving a sense of what a particular wave will do when it comes in contact with that device.

The manufacturing of many devices involving light interactions uses a fabrication process by layering material on top of each other in a lab, just like Legos. This called layered media. Computer simulations then analyze the layered media using mathematical models to see how the material in question is interacting with light.

The problem of wave source and material interactions in the layer structure has been a very challenging one for the mathematicians and engineers for the last 30 years.

The new algorithm modifies a mathematical method called the fast multipole method, or FMM, which considered one of the top 10 algorithms in the 20th century.