Application Gallery

The ability to modify an object's thermal radiation profile is important in many areas of applied physics and engineering. It has been noted that periodic engineering of devices made of metallic and dielectric materials at the subwavelength scale can change the thermal radiation properties of the device. This case studies the thermal radiation of a photonic crystal obtained by periodically arranging a device made of metallic tungsten and a dielectric material.

Metamaterial is a special type of man-made material with extraordinary physical properties that natural materials do not have, such as regulating the frequency, amplitude, phase, etc. of electromagnetic waves. This case models and simulates a Metal-Insulator-Metal (MIM) plasmonic metamaterial infrared absorber to study its reflection/transmission/absorption characteristics in the visible to near-infrared band.

Directivity is defined as the ratio of the radiation intensity in a specified direction to the average radiation intensity. It is obtained through further analysis of far-field data and is one of the important parameters describing far-field radiation characteristics. In the FDTD solver of the SimWorks optical finite-difference solution, the Directivity analysis group can be used to further analyze and calculate the far field.

Generally, in the simulation of high-Q resonant cavities, the field amplitude obtained is inaccurate. The reason is that the loss rate in the high-Q resonant cavity is slow. If the simulation time is not long enough, the field in the cavity will not decay to 0 at the end of the simulation. At this time, the amplitude of the mode field in the cavity needs to be corrected to obtain the final actual amplitude. This case constructs a photonic crystal resonant cavity structure to demonstrate how to correct the field amplitude when the simulation time of a high-Q resonant cavity is insufficient.

In this case, the optical waveguide model with periodic structure in the propagation axis is constructed, and the bandstructure of the waveguide is analyzed.

In this case, BCC and FCC photonic crystals are constructed and their bandstructures are analyzed using FDTD solvers.

3D Cubic Lattice is a special case of 3D Rectangular Lattice. The lattice spacing of this type of photonic crystal is equal in three axes in space.

In this case, a 2D triangular-lattice PC formed by air cylinders arranged in parallel in the medium is constructed, and its bandstructure is calculated.

Photonic crystals, as a dielectric structure with periodic changes in dielectric constant, can prevent light of a specific frequency from propagating internally, forming a photonic band gap.

In nonlinear optics, the interaction between light and media produces nonlinear polarization. Second-order nonlinear effects are widely used in optical frequency doubling, frequency mixing, and modulation, which play an important role in lasers, frequency conversion and other devices. This example will simulate the generation of second harmonic using second-order nonlinear materials.