Refer The Concept Of Optical Properties Of The Device

In the realm of modern physics, condensed-matter physics takes an important place. Of all the new progress in the condense-matter physics, low dimensionality, which is rich in content of research and has profound physical connotation, is one of the most active researching fields. Its descriptive objects are referred to dimensional material or matter of mesoscopie system. These systems present many unique physical properties which are different from the ones of conventional material or matter because of the system dimensionality's change and the decrease in size.Superlattice that has been extensively studied is one kind of mesoscopie structures. So far, there is much research production on superlattice's quantum limit, resonant-tunneling, miniband effect, phonon limit, 2D electron gas, et al. In this paper, it mostly studies the optical properties of superlattice, especially the optical phenomenon connected with Bloch oscillation.It treats the superlattice using the nearest-neighbor tight-binging (NNTB) mode firstly, and then studies the spontaneous emission of Bloch oscillation in an alternating electric filed. And the influence of the ratio of Bloch frequency with electric one on the spontaneous emission probability is analyzed. It shows that the spontaneous emission probability can be enhanced through adjusting the ratio of the Bloch frequency with the electric one.Chapter one introduces the basic mesoscopie structures and the fundamental theoretical knowledge.Chapter two expresses the optical and electric properties in the mesoscopie structures.Chapter three studies the optical properties of superlattice about the Bloch oscillation, and gains some significance results, and summarizes the work of the paper and looks forward to the next work.