Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 48: Quantum Optics II

Q 48.6: Vortrag

Donnerstag, 14. März 2019, 11:45–12:00, S Ex 04 E-Tech

Ghost imaging with broad-area superluminescent diodes — •Kai Hansmann and Reinhold Walser — Institut für Angewandte Physik, Technische Universität Darmstadt, Hochschulstr. 4a, 64289 Darmstadt

Ghost imaging is an imaging technique, which utilizes correlations between photons to produce images. The first realization of such an imaging scheme used quantum entangled photons from a parametric down conversion source [1]. Subsequently, it has been shown that ghost images can also be obtained through means of classical correlations [2].

Most classical ghost imaging setups use pseudo-thermal light, with correlation times in the ms-scale, for image generation. The recent development in two-photon-absorption detection enables correlation measurements for genuine thermal light in the fs-region. This makes it possible to utilize spectrally broadband light sources, like broad-area quantum-dot superluminescent diodes, to produce ghost images [3].

We investigate the temporal and spatial correlations of such light sources and compare theoretical descriptions with experimental results to confirm such sources can be used in ghost imaging.

[1] T.B. Pittmann et al., Optical imaging by means of two-photon quantum entanglement, Phys. Rev. A, 52, R3429 (1995).

[2] R.S. Bennink et al., ”Two-Photon” coincidence imaging with a classical source, Phys. Rev. Letters, 89(11), 113601 (2002).

[3] S. Hartmann et al., A novel semiconductor-based, fully incoherent amplified spontaneous emission light source for ghost imaging, Scietific Reports, 7 (2017)