Impact of high-frequency pumping on anomalous finite-size effects in three-dimensional topological insulators

Lowering of the thickness of a thin-film three-dimensional topological insulator down to a few nanometers results in the gap opening in the spectrum of topologically protected two-dimensional surface states. This phenomenon, which is referred to as the anomalous finite-size effect, originates from hybridization between the states propagating along the opposite boundaries. In this work, we consider a bismuth-based topological insulator and show how the coupling to an intense high-frequency linearly polarized pumping can further be used to manipulate the value of a gap. We address this effect within recently proposed Brillouin-Wigner perturbation theory that allows us to map a time-dependent problem into a stationary one. Our analysis reveals that both the gap and the components of the group velocity of the surface states can be tuned in a controllable fashion by adjusting the intensity of the driving field within an experimentally accessible range and demonstrate the effect of light-induced band inversion in the spectrum of the surface states for high enough values of the pump.Comment: 6 pages, 3 figure

Histopathologic features of ALK-positive diffuse large B cell lymphoma.

<p>(haematoxylin & eosin). A: Medium- to large-sized cells with prominent nucleoli B: Sinusoidal Invasion C: plasmablastic/immunoblastic differentiation D: Multinucleated giant neoplastic cells E: Focal necrosis F: frequent mitosis.</p

Summary of the clinicopathologic fueatures of the ALK+, LBCL cases of our study and the reviewed literatures.

<p>Summary of the clinicopathologic fueatures of the ALK+, LBCL cases of our study and the reviewed literatures.</p

Clinical information and follow up data of 17 patients.

<p>Clinical information and follow up data of 17 patients.</p

s1.docx, s2.dox Xiang-Nan Jiang

Primers for the detection of ALK fusion transcripts and <b>summary of immunohistochemical findings</b