Non-Poissonian ultrashort, nanoscale electron pulses

Formation of ultrashort pulses with sub-Poissonian photon statistics

A simple method for the production of ultrashort light pulses (USPs) with suppressed photon fluctuations is considered. The method is based on self-phase modulation (SPM) of an USP in a nonlinear medium (optical fibre) and subsequent transmission of pulse through a dispersive optical element.

Light Pulse Squeezed State Formation In Medium With The Relaxation Kerr Nonlinearity

The consistent theory of formation of pulsed squeezed states as a result of self-action of ultrashort light pulse in the medium with relaxation Kerr nonlinearity has been developed. A simple method to form the ultrashort light pulse with sub-Poissonian photon statistics is analyzed too.

The interference of the nonclassical light pulse with a coherent one and the sub-Poissonian statistics formation

Using the theoretical model of the optical beam-splitter, the interference of the self-phase modulated ultrashort light pulse (SPM-USP) with the coherent one is investigated. It is found that, the choice of the coefficient of transmission of the beam-splitter allows one to get the spectra of quadrature fluctuations with forms of interest to us. It is shown that the choice of the geometrical phase gives one the control of the position of the ellipse of squeezing in the quadrature space XY. The extended Mandel parameter is introduced and the photon statistics is scanned at all frequencies. It is…

Ultrashort Pulses for Far-Field Nanoscopy

We show that ultrashort pulses can be focused, in a particular instant, to a spot size given by the wavelength associated with its spectral width. For attosecond pulses this spot size is within the nanometer scale. Then we show that a two-level system can be left excited after interacting with an ultrashort pulse whose spectral width is larger than the transition frequency, and that the excitation probability depends not on the field amplitude but on the field intensity. The latter makes the excitation profile have the same spot size as the ultrashort pulse. This unusual phenomenon is caused b…

非经典光的多光子电子发射

Multi-photon electron emission with non-classical light

本文通过实验证明，光的光子统计特性（经典泊松或量子超泊松）可印记到金属针尖发射的电子上，利用明亮压缩真空光实现极端电子数事件，并可定制电子数分布，为新型传感器和强场量子光学开辟道路。

Free-Electron Shaping Using Quantum Light

Controlling the wave function of free electrons is important to improve the spatial resolution of electron microscopes, the efficiency of electron interaction with sample modes of interest, and our ability to probe ultrafast materials dynamics at the nanoscale. In this context, attosecond electron compression has been recently demonstrated through interaction with the near fields created by scattering of ultrashort laser pulses at nanostructures followed by free electron propagation. Here, we show that control over electron pulse shaping, compression, and statistics can be improved by replacin…