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Abstract
We experimentally investigate the feasibility of a bolometric device based on exciton-polaritons. Initial measurements presented in this work show that heating – via thermal expansion and bandgap renormalization – modifies the exciton-polariton propagation wavevector making exciton-polaritons propagation remarkably sensitive to thermal variations. By theoretical simulations we predict that using a single layer graphene absorbing layer, a THz bolometric sensor can be realized by a simple exciton-polariton ring interferometer device. The predicted sensitivity is comparable to presently existing THz bolometric devices with the convenience of being a device that inherently produces an optical signal output.
Highlights
Bolometers are well-known for their ability to detect electromagnetic radiation by absorbing energy and measuring associated temperature changes[1]
While traditionally studied for their fundamental effects[8], these quasi-particles have demonstrated a number of properties useful for hybrid electro- optic devices: direct coupling to both electric and optical fields, fast-response times, long coherence lengths/times, and strong nonlinearity as compared to typical nonlinear optical materials
We experimentally measure the temperature induced changes in the interference of counter-propagating polariton condensates and show that such a bolometer device can serve as a platform for temperature sensing and be adopted for use as a THz radiation detector
Summary
Bolometers are well-known for their ability to detect electromagnetic radiation by absorbing energy and measuring associated temperature changes[1]. While traditionally studied for their fundamental effects[8], these quasi-particles have demonstrated a number of properties useful for hybrid electro- optic devices: direct coupling to both electric and optical fields, fast-response times, long coherence lengths/times, and strong nonlinearity as compared to typical nonlinear optical materials. In the recent years, numerous polariton based THz emitting devices have been proposed, until now, no polariton based THz detection schemes have been considered. In contrast to conventional bolometer schemes, a polaritonic based bolometer sensor would couple THz induced thermal variations to a polariton-based signal rather than an electrical output. We experimentally measure the temperature induced changes in the interference of counter-propagating polariton condensates and show that such a bolometer device can serve as a platform for temperature sensing and be adopted for use as a THz radiation detector
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