TY - JOUR

T1 - Multifrequency sources of quantum correlated photon Pairs on-chip

T2 - A path toward integrated Quantum Frequency Combs

AU - Caspani, Lucia

AU - Reimer, Christian

AU - Kues, Michael

AU - Roztocki, Piotr

AU - Clerici, Matteo

AU - Wetzel, Benjamin

AU - Jestin, Yoann

AU - Ferrera, Marcello

AU - Peccianti, Marco

AU - Pasquazi, Alessia

AU - Razzari, Luca

AU - Little, Brent E.

AU - Chu, Sai T.

AU - Moss, David J.

AU - Morandotti, Roberto

N1 - Funding 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 support from FRQNT (Fonds de Recherche du Québec-Nature et Technologies) through the Merit Scholarship Program for Foreign Students; Ministère de l'Éducation, de l'Enseignement Supérieur et de la Recherche du Québec. 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 no [627478], B.W. for INCIPIT under REA grant agreement no [625466], M.C. for KOHERENT under REA grant agreement no [299522], M.F. for ATOMIC under REA grant agreement no [329346], M.P. for THEIA under REA grant agreement no [630833], and A.P. for CHRONOS under REA grant agreement no [327627]. S.T.C. acknowledges the support from the CityU SRG-Fd program #7004189.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - 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.

AB - 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.

KW - physics.optics

KW - physics.app-ph

KW - quant-ph

UR - http://www.scopus.com/inward/record.url?scp=84975691329&partnerID=8YFLogxK

U2 - 10.1515/nanoph-2016-0029

DO - 10.1515/nanoph-2016-0029

M3 - Article

VL - 5

SP - 351

EP - 362

JO - Nanophotonics

JF - Nanophotonics

SN - 2192-8614

IS - 2

ER -