Multifrequency sources of quantum correlated photon pairs on-chip: a path towards integrated quantum frequency combs

Caspani, L. et al. (2016) Multifrequency sources of quantum correlated photon pairs on-chip: a path towards integrated quantum frequency combs. Nanophotonics, 5(2), pp. 351-362. (doi: 10.1515/nanoph-2016-0029)

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Abstract

Recent developments in quantum photonics have initiated the process of bringing photonic-quantumbased systems out-of-the-lab and into real-world applications. As an example, devices to enable the exchange of a cryptographic key secured by the laws of quantum mechanics are already commercially available. In order to further boost this process, the next step is to transfer the results achieved by means of bulky and expensive setups into miniaturized and affordable devices. Integrated quantum photonics is exactly addressing this issue. In this paper, we briefly review the most recent advancements in the generation of quantum states of light on-chip. In particular, we focus on optical microcavities, as they can offer a solution to the problem of low efficiency that is characteristic of the materials typically used in integrated platforms. In addition, we show that specifically designed microcavities can also offer further advantages, such as compatibility with telecom standards (for exploiting existing fibre networks) and quantum memories (necessary to extend the communication distance), as well as giving a longitudinal multimode character for larger information transfer and processing. This last property (i.e., the increased dimensionality of the photon quantum state) is achieved through the ability to generate multiple photon pairs on a frequency comb, corresponding to the microcavity resonances. Further achievements include the possibility of fully exploiting the polarization degree of freedom, even for integrated devices. These results pave the way for the generation of integrated quantum frequency combs that, in turn, may find important applications toward the realization of a compact quantum-computing platform.

Item Type:Articles
Additional Information:This work was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Steacie and Discovery Grants Schemes, and by the Australian Research Council (ARC) Discovery Projects program. C.R. and P.R. acknowledge the support of an NSERC Vanier Canada Graduate Scholarship and NSERC Alexander Graham Bell Canada Graduate Scholarship-Master’s (CGS-M), respectively. M.K. acknowledges the support from the “Fonds de recherche du Québec – Nature et technologies” (FRQNT) through the MELS fellowship program. We acknowledge the support from the People Programme (Marie Curie Actions) of the European Union’s FP7 Programme: L.C. for THREEPLE under REA grant agreement n° [627478], B.W. for INCIPIT under REA grant agreement n° [625466], M.C. for KOHERENT under REA grant agreement n° [299522], M.F. for ATOMIC under REA grant agreement n° [329346], M.P. for THEIA under REA grant agreement n° [630833], and A.P. for CHRONOS under REA grant agreement n°[327627]. S.T.C. acknowledges the support from the CityU SRG-Fd program #7004189.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Kues, Dr Michael and Clerici, Professor Matteo
Authors: Caspani, L., Reimer, C., Kues, M., Poztocki, P., Clerici, M., Wetzel, B., Jestin, Y., Ferrera, M., Peccianti, M., Pasquazi, A., Razzari, L., Little, B. E., Chu, S. T., Moss, D. J., and Morandotti, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Nanophotonics
Publisher:De Gruyter
ISSN:2192-8614
Published Online:28 April 2016
Copyright Holders:Copyright © 2016 Lucia Caspani et al.
First Published:First published in Nanophotonics 5(2): 351-362
Publisher Policy:Reproduced under a Creative Commons License

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