A new technique for direct-writing of polymer nanostructures on insulating and semiconducting surfaces based on Electrochemical Dip-Pen Nanolithography (E-DPN) is described. The technique is based on electrochemical polymerization of monomers directly underneath the AFM tip. Sub-50 nm poly-3,4-ethylenedioxythiophene lines can be easily created. Such capability to direct-write and pattern polyme...

The conditions for THz radiation generation caused by electron transite time resonance in momentum and real spaces under low-temperature opticalphonon emission are analyzed. It is shown that such a phenomenon provides a unique possibility to realize the sub-THz and THz radiation generation at the border of the electrooptical and electronic techniques by using both the approaches: (i) amplificat...

Two extended cavity laser diodes are phase-locked, thanks to an intra-cavity electrooptical modulator. The phase-locked loop bandwidth is on the order of 10 MHz, which is about twice larger than when the feedback correction is applied on the laser current. The phase noise reaches -120 dBrad/Hz at 10 kHz. This new scheme reduces the residual laser phase noise, which constitutes one of the domina...