I am new to COMSOL and I wish to simulate the radiation ( Electric field) in terahertz domain from a nano-antenna structure which consists of two electrodes separated by a 25um gap. The electrodes have dimensions in um as well. These electrodes are deposited on a GaAs crystal. The generation of terahertz waves is done in steps as follows:
1] an incident laser light wave focused on the gap between the electrodes creates some electrons (charged carriers)
2] an electric potential square wave of +-20V is applied between the two electrodes
3] the charge carriers i.e. electrons generated due to the laser light then get accelerated towards the electrode and within a few pico-seconds die out ; this phenomenon produces radiation in the terahertz region
Guessing the physics required , I think I need something that will simulate:
1] charge density distribution over time on a semiconductor
2] lumped port (?) to simulate the electric potential
3] radiation equations from moving charge carriers
Someone please help regarding any matter on this topic
1] an incident laser light wave focused on the gap between the electrodes creates some electrons (charged carriers)
2] an electric potential square wave of +-20V is applied between the two electrodes
3] the charge carriers i.e. electrons generated due to the laser light then get accelerated towards the electrode and within a few pico-seconds die out ; this phenomenon produces radiation in the terahertz region
Guessing the physics required , I think I need something that will simulate:
1] charge density distribution over time on a semiconductor
2] lumped port (?) to simulate the electric potential
3] radiation equations from moving charge carriers
Someone please help regarding any matter on this topic