In recent years, the quantum engineering of light have received much attention, which is mainly motivated by the potential improvement offered by quantum mechanics to the manipulation and the transmission of information. In particular, some conditional schemes have been suggested to prepare superpositions. Among these we mention the Fock filtering by an active Fabry-Perot cavity [1], the displa...

We report preparation and characterization of coherent superposition states t[0>+alpha]1> of the electromagnetic field by conditional measurements on a beam splitter. This state is generated in one of the beam splitter output channels if a coherent state [alpha> and a single-photon Fock state [1> are present in the two input ports and a single photon is registered in the other beam splitter out...

The beam splitter has played numerous roles in many aspects of optics. For example, in quantum information the beam splitter plays essential roles in teleportation, bell measurements, entanglement and in fundamental studies of the photon. Electric fields E1 and E2 enter input ports 1 and 2, respectively. Field 1 evolves as E1 → TE3 + RE4, where T,R are the transmission and reflection coefficien...

Weak measurement [1,19] combined with quantum delayed-choice experiment that use quantum beam splitter instead of the beam splitter give rise to a surprising amplification effect, i.e., counterintuitive negative amplification effect. We show that this effect is caused by the wave and particle behaviours of the system to be and can’t be explained by a semiclassical wave theory, due to the entang...

Modern microscopy in life sciences is ruled by development and exploration of new dyes and stains (probes for histochemical staining, quantum dots, fluorescent proteins etc.) on one side, and technological improvements and innovations for fluorescence microscopy – especially high resolution and optical sectioning microscopy – on the other side. Concerning the technical innovations, several inge...

We present a white-light spectral interferometric technique for measuring the absolute spectral optical path difference (OPD) between the beams in a slightly dispersive Michelson interferometer with a thin-film structure as a mirror. We record two spectral interferograms to obtain the spectral interference signal and retrieve from it the spectral phase, which includes the effect of a cube beam ...

The theory and practical realization of a broadband quantum-noise generator based on an original integrated optical beam splitter in the form Mach-Zehnder interferometer is demonstrated. with double output, made lithium niobate substrate, provides accurate electro-optical balancing homodyne detection circuit. experimentally obtained excess quantum noise over classical 12 dB frequency band 4 GHz...

The terahertz (THz) frequency region of the electromagnetic spectrum is located between the traditional microwave spectrum and the optical frequencies, and offers a significant scientific and technological potential in many fields, such as in sensing, in imaging and in spectroscopy. Waveguiding in this intermediate spectral region is a major challenge. Amongst the various THz waveguides suggest...

We show that a beam splitter of reflectivity one-third can be used to realize a quantum phase gate operation if only the outputs conserving the number of photons on each side are post-selected. The main difficulty in realizing quantum computation and quantum information processing for single photon qubits is the optical implementation of controlled interactions between individual qubits. A dete...

High-resolution ghost image and ghost diffraction experiments are performed by using a single classical source of pseudothermal speckle light divided by a beam splitter. Passing from the image to the diffraction result solely relies on changing the optical setup in the reference arm, while leaving the object arm untouched. The product of spatial resolutions of the ghost image and ghost diffract...