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MOEMS and Miniaturized Systems

Miniaturization of the Hanbury Brown-Twiss configuration (Conference Presentation)

Martin Jahn, Dominik Karolewski, Julia S. Baldauf, Geert Brokmann, Thomas Ortlepp

Published Mar 10, 2020• 0 citations
Publisher

Abstract

Miniaturized versions of nowadays tabletop setups will be necessary for a successful commercialization of quantum cryptography and computing. Within this contribution, we present a concept for downsizing the Hanbury Brown-Twiss configuration. The design is based on optical simulations, with the aim of finding the best compromise of detection efficiency and level of miniaturization. Since scattering effects are important for evaluating the system’s performance, a complete scattering analysis got performed.

DOI
10.1117/12.2545667

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Miniaturized versions of nowadays tabletop setups will be necessary for a successful commercialization of quantum cryptography and computing. Within this contribution, we present a concept for downsizing the Hanbury Brown-Twiss configuration. The design is based on optical simulations, with the aim of finding the best compromise of detection efficiency and level of miniaturization. Since scattering effects are important for evaluating the system’s performance, a complete scattering analysis got performed.
An important step towards the commercialization of quantum technology is the miniaturization of nowadays tabletop setups. The Hanbury Brown-Twiss (HBT) configuration is an important building block in many quantum optics experiments. Within this contribution, we present and compare different concepts for realizing a miniaturized, fiber-coupled HBT configuration, which will be robust and adjustment free. The design process is based on ray tracing simulations, with the aim of finding the best compromise regarding the level of miniaturization and detection efficiency. As an application example, the detection of the luminescence of two different charge states of nitrogen vacancy (NV) centers in diamond is used. For this reason, in contrast to the actual HBT experiment, a dichroic beam splitter is used.
The Hanbury Brown-Twiss effect is one of the celebrated phenomenologies of modern physics that accommodates equally well classical (interferences of waves) and quantum (correlations between indistinguishable particles) interpretations. The effect was discovered in the late thirties with a basic observation of Hanbury Brown that radio-pulses from two distinct antennas generate signals on the oscilloscope that wiggle similarly to the naked eye. When Hanbury Brown and his mathematician colleague Twiss took the obvious step to propose bringing the effect in the optical range, they met with considerable opposition as single-photon interferences were deemed impossible. The Hanbury Brown-Twiss effect is nowadays universally accepted and, being so fundamental, embodies many subtleties of our understanding of the wave/particle dual nature of light. Thanks to a novel experimental technique, we report here a generalized version of the Hanbury Brown-Twiss effect to include the frequency of the detected light, or, from the particle point of view, the energy of the detected photons. Our source of light is a polariton condensate, that allows high-resolution filtering of a spectrally broad source with a high degree of coherence. In addition to the known tendencies of indistinguishable photons to arrive together on the detector, we find that photons of different colors present the opposite characteristic of avoiding each others. We postulate that fermions can be similarly brought to exhibit positive (boson-like) correlations by frequency filtering.
The Hanbury Brown-Twiss effect is one of the celebrated phenomenologies of modern physics that accommodates equally well classical (interferences of waves) and quantum (correlations between indistinguishable particles) interpretations.The effect was discovered in the late thirties with a basic observation of Hanbury Brown that radio-pulses from two distinct antennas generate signals on the oscilloscope that wiggle similarly to the naked eye.When Hanbury Brown and his mathematician colleague Twiss took the obvious step to propose bringing the effect in the optical range, they met with considerable opposition as single-photon interferences were deemed impossible.The Hanbury Brown-Twiss effect is nowadays universally accepted and, being so fundamental, embodies many subtleties of our understanding of the wave/particle dual nature of light.Thanks to a novel experimental technique, we report here a generalized version of the Hanbury Brown-Twiss effect to include the frequency of the detected light, or, from the particle point of view, the energy of the detected photons.Our source of light is a polariton condensate, that allows high-resolution filtering of a spectrally broad source with a high degree of coherence.In addition to the known tendencies of indistinguishable photons to arrive together on the detector, we find that photons of different colors present the opposite characteristic of avoiding each others.We postulate that fermions can be similarly brought to exhibit positive (bosonlike) correlations by frequency filtering.