Biphotonic absorption of photons entangled in molecules

The experimental arrangement shown allows us to study the phenomenon of absorption of entangled photon pairs at low photon flux densities for organic molecules in solution. We have studied the biphotonic absorption of entangled photons in some compounds that are of particular interest for applications in spectroscopy and optical microscopy techniques.

Artículo: J. Phys. Chem. A, 2017, 121 (41), pp 7869-7875.

Measure the joint frequency spectrum of entangled photon pairs.

Photon pairs produced by a SPDC (Spontaneous Paramatric Down Conversion) process have correlations in time(frequency) and space.
The objective of this project is to measure the joint spectrum of frequencies from the time correlation functions of entangled photon pairs.
From the analysis of the obtained joint spectrum, the statistics (bunched, antibunched or random) of these photon pairs can be studied.

Bright source of entangled photon pairs using optical cavities

The most convenient way to produce interlaced photons is by spontaneous parametric downconversion (SPDC) using nonlinear crystals.
However, the efficiency of the SPDC process is very low and one way to increase the number of photons is by means of optical cavities.
The objective of this project is to build an optical cavity for pumping light and increase the SPDC photon yield.

What does the spatial shape of entangled photon pairs look like?

In this experiment we are studying the spatial correlations of photon pairs produced by spontaneous parametric conversion (SPDC). The objective is to reconstruct the joint detection probability and determine its behavior as we change different experimental parameters, e.g., the pumping laser characteristics and the polarization measurement scheme.

Article: Optics Letters Vol. 41, Issue 6, pp. 1165-1168 (2016)

Study of quantum dynamics using photonic systems

In this project we study open quantum dynamics using photonic systems by means of the experimental setup shown below. In particular, we use polarization as the system and transverse momentum as the environment. Coupling these two degrees of freedom, we simulate the evolution of a dynamics. Finally it is characterized by observing the changes in the system by means of a polarization tomography.

Artículo: Phys. Rev. A 98, 053862 (2018) | Optics Express Vol. 26, Issue 9, pp. 11940-11949 (2018)

3D Printed Toolbox para Componentes Opto-mecanicos

The development of a set of opto-mechanical components that can be built easily using a 3D printer based on Fused Filament Fabrication (FFF) and parts that can be found on any hardware store. The components of the set presented here are highly customizable, low-cost, require a short time to be fabricated and offer a performance that compares favorably with respect to low-end commercial alternatives.

Article: PLoS ONE 12(1): e0169832 (2017)

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Universidad de los Andes | Vigilada Mineducación
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