تقرير
A silicon source of heralded single photons at 2 $\mu$m
| العنوان: | A silicon source of heralded single photons at 2 $\mu$m |
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| المؤلفون: | Signorini, S., Sanna, M., Piccione, S., Ghulinyan, M., Tidemand-Lichtenberg, P., Pedersen, C., Pavesi, L. |
| المصدر: | APL Photonics 6, 126103 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Physics - Optics |
| الوصف: | Mid infrared integrated quantum photonics is a promising platform for applications in sensing and metrology. However, there are only few examples of on-chip single photon sources at these wavelengths. These have limited performances with respect to their C-band counterparts. In this work, we demonstrate a new approach to generate heralded single photons in the mid infrared on a silicon chip. By using a standard C-band pump, the inter-modal spontaneous four wave mixing enables the generation of the herald idler at 1259.7 nm and the heralded signal at 2015 nm. The idler photon is easily detected with a common infrared single photon detector while the signal photon is upconverted to the visible before its detection. In this way, we are able to operate a mid infrared source without the need of mid infrared detectors and laser sources. By measuring a heralded $g^{(2)}$ of $0.23 \, \pm \, 0.08$ we demonstrate the single photon behaviour of the source as well as the feasibility of multi-photon coincidence measurements beyond 2 $\mu$m with our setup. The source exhibits a high intrinsic heralding efficiency of $(59 \, \pm \,5)\%$, a maximum coincidence to accidental ratio of $40.4 \, \pm \, 0.9$ and a generation probability of $\left( 0.72 \, \pm \, 0.10 \right)$ W$^{-2}$. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/5.0063393 |
| URL الوصول: | http://arxiv.org/abs/2108.01031 |
| رقم الأكسشن: | edsarx.2108.01031 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/5.0063393 |
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