High-harmonic generation in a quantum electron gas trapped in a nonparabolic and anisotropic well

• Autor(a) principal: Hurst, Jérôme
• Data de Publicação: 2016
• Outros Autores: Lévêque-Simon, Kévin, Hervieux, Paul-Antoine, Manfredi, Giovanni, Haas, Fernando
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/142525
• topic: Hidrodinâmica; Gás de elétrons; Semicondutores

An effective self-consistent model is derived and used to study the dynamics of an electron gas confined in a nonparabolic and anisotropic quantum well. This approach is based on the equations of quantum hydrodynamics, which incorporate quantum and nonlinear effects in an approximate fashion. The effective model consists of a set of six coupled differential equations (dynamical system) for the electric dipole and the size of the electron gas. Using this model we show that: (i) high harmonic generation is related to the appearance of chaos in the phase space, as attested to by related Poincar´e sections; (ii) higher order harmonics can be excited efficiently and with relatively weak driving fields by making use of chirped electromagnetic waves.