We consider a spatially periodic (cosine) potential as a model for a crystalline solid that interacts with a harmonically oscillating external electric field. This problem is periodic both in space and time and can be solved analytically using the Kramers-Henneberger co-moving frame. By analyzing the stability of the closely related Mathieu-type differential equation, the electronic band structure can be obtained. We demonstrate that by changing the field intensity, the width of the zero-field band gaps can be drastically modified, including the special case when the external field causes the band gaps to disappear.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - ápr. 17 2019|
|Event||27th Annual International Laser Physics Workshop, LPHYS 2018 - Nottingham, United Kingdom|
Duration: júl. 16 2018 → júl. 18 2018
ASJC Scopus subject areas
- Physics and Astronomy(all)