Two-plasmon linear intersubband absorption of light in biased quantum wells cond-mat/0501406

1. RUI: Spectroscopy of Many-Body Processes in Semiconductor NanostructuresTigran V. Shahbazyan, Jackson State University,DMR-0305557 Two-plasmon linear intersubband absorption of light in biased quantum wellscond-mat/0501406 J. Dai and M. E. Raikh (U. Utah), T. V. Shahbazyan (JSU) -- A new many-body effect in semiconductor oprics, two-plasmon intersubband absorption of light in biased quantum wells is predicted. The new absorption peak at 2D (D is subband separation) consists of a sharp two-plasmon feature on top of a broad two-electron absorption band. A distinctive feature of the new peak is its sensitivity to the well asymmetry or to external bias. For a symmetric well, the effect emerges only at finite bias and grows with it quadratically. Fig 1. Absorption spectrum of a quantum well. Dashed line: single-electron peak; Full line: two-electron peak. Inset: threshold behavior of two-electron absorption

2. RUI: Spectroscopy of Many-Body Processes in Semiconductor NanostructuresTigran V. Shahbazyan, Jackson State University,DMR-0305557 Education and Outreach: Two undergraduate students, Kendrik Walker and Brenitra Mosley, have been supported through this grant as research assistants. Student research at JSU is conducted in the general framework of NSF Nanotechnology Undergraduate Education program at Physics Department. During past year, 8 students from traditionally underrepresented groups, including female students, have been involved in various research projects with several faculty. These activities resulted in student presentations at four conferences.All students participated in summer programs at research sites at JSU. Two students had summer internships in Cornell University.