Evgenii Narimanov

Assistant Professor of Electrical Engineering
Ph.D. 1995, PhysTech, Moscow Institute of Physics and Technology

In the recent years, my research has focused on the mesoscopic physics of photonic and electronic devices, such as semiconductor microlasers and quantum dots. The word "mesoscopic", introduced initially to represent a scale intermediate between "micro "and "macro", refers to a system, which is substantially larger than the (de Broglie) wavelength, but still coherent. As a result, the interference effects become important and strongly affect the properties of the corresponding devices. I am particularly interested in the manifestations of the classical transition from integrability to chaos , which can have a dramatic effect on the device performance. In particular, we have recently demonstrated that introducing non-integrable deformation to the shape of a semiconductor microdisk laser, leads to an increase of the power output of the device by three orders of magnitude.

Most of the work in the field of "quantum" (or "wave") chaos has addressed the behavior of systems governed by linear equations (such as Shroedinger or Maxwell's equations). However, the evolution of a device interacting with the environment, is often characterized by an essentially nonlinear law. This becomes important for e.g. semiconductor lasers due to the spatial "hole-burning" and Kerr nonlinearity of the refraction index. The interplay of this "quantum" nonlinearity and the "classical" chaos is an interesting problem relevant for the development of future semiconductor devices.

Another direction of my research is the development of information theory for fiber optics communication systems. The fiber nonlinearity (due to e.g. Kerr effect) leads to a "cross-talk" between different wavelength-division multiplexing channels and degrades the performance of the fiber optics communication systems. This nonlinear effect is not adequately described within the standard information theory, developed for essentially linear systems.

"bow-tie" resonance in the microdisk laser