In this page you would find about several of our recent and ongoing research efforts. For prospective research students with little background it is recommended to also read our intro page .

High-harmonic-generation from coherently controlled excited medium

HHG

We are interested in combining two different regimes of coherent control. The first regime is "classical" coherent control which includes transitions between bound states and is used to coherently excite a given medium. In this regime there are very well known effects such as Rabi oscillations, adiabatic passage and Ramsey fringes to name a few. The second regime is coherent control of electron population between a bound state and a continuum. In this regime the process of high-harmonic-generation (HHG) is of particular interest for us. In HHG ionization and recollision of electrons leads to the emission of high-energy photons, such as extreme-UV (EUV) radiation. We are mainly interested in controlling the process of HHG through the application of "classical" coherent control, both at the single emitter level and at the macroscopic scale, involving many emitters over extended length and time scales.

Superoscillations in optics

SO

Superoscillatory signals contain local oscillations with rates which exceed the spectral content of the signal. At heart this is an interference phenomena between spectral modes which is reminiscent of the phenomena of a beat frequency. We are interested in exploiting the fact that superoscillations are not susceptible to operations which are described through their spectral response to achieve unintuitive optical behavior. One such an example is overcoming or "cheating" the absorption in dielectric materials.



Applications of Genetic and behavioral algorithms

GA
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Behavioral and genetic algorithms use ideas from the biological world to solve optimization problems who do not have an analytical solutions and whose solution space is huge. We use such algorithms to solve different problems in optics. For example - designing optical nano antennas which would be optimized for nonlinear frequency conversion processes.





Coupled mode dynamics

BreathingSolitonPair

We are interested in novel phenomena emerging when different optical modes are coupled with the use of a temporal modulation. For example, when two modes oscillating at different frequencies, while having opposite dispersion are coupled by a temporal modulation the coupled mode dynamics leads to the formation of a stable soliton pair propagating in the waveguide.