Non-classical interference in integrated 3D multiports

Meany, Thomas; Delanty, Michael; Gross, Simon; Marshall, Graham D.; Steel, M. J.; Withford, Michael J.

doi:10.1364/oe.20.026895

Cited by 54 publications

(52 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Having techniques that successfully predict device performance will be critical as experimental capacities continue to improve, making this demonstration an important step forward. An alternative scheme has recently been introduced for inferring the overall unitary transformation implemented by a device from a series of classical interference experiments using only the nominal input and output ports [26][27][28] . Although this does not give access to individual components, it may be useful for cases where only the operation of the device as a whole is of concern.…”

Section: Discussionmentioning

confidence: 99%

Multiphoton quantum interference in a multiport integrated photonic device

et al. 2013

View full text Add to dashboard Cite

Increasing the complexity of quantum photonic devices is essential for many optical information processing applications to reach a regime beyond what can be classically simulated, and integrated photonics has emerged as a leading platform for achieving this. Here we demonstrate three-photon quantum operation of an integrated device containing three coupled interferometers, eight spatial modes and many classical and nonclassical interferences. This represents a critical advance over previous complexities and the first on-chip nonclassical interference with more than two photonic inputs. We introduce a new scheme to verify quantum behaviour, using classically characterised device elements and hierarchies of photon correlation functions. We accurately predict the device's quantum behaviour and show operation inconsistent with both classical and bi-separable quantum models. Such methods for verifying multiphoton quantum behaviour are vital for achieving increased circuit complexity. Our experiment paves the way for the next generation of integrated photonic quantum simulation and computing devices.

show abstract

Section: Discussionmentioning

confidence: 99%

Multiphoton quantum interference in a multiport integrated photonic device

et al. 2013

View full text Add to dashboard Cite

show abstract

“…3D photonic circuitry has been exploited for the generation and verification of single-photon W-states, a robust quantum superposition state that features a uniform photon distribution across multiple modes [169]. Non-classical three-photon interfer-ence has been observed in 3D three-waveguide splitters for quantum interferometry and metrology [170,171]. Indeed, a 3D three-path laser written interferometer has been shown to exhibit enhanced phase sensitivity by using nonclassical photons, thus potentially enabling highly sensitive metrology [172].…”

Section: D Quantum Photonicsmentioning

confidence: 99%

Ultrafast-laser-inscribed 3D integrated photonics: challenges and emerging applications

2015

View full text Add to dashboard Cite

Since the discovery that tightly focused femtosecond laser pulses can induce a highly localised and permanent refractive index modification in a large number of transparent dielectrics, the technique of ultrafast laser inscription has received great attention from a wide range of applications. In particular, the capability to create three-dimensional optical waveguide circuits has opened up new opportunities for integrated photonics that would not have been possible with traditional planar fabrication techniques because it enables full access to the many degrees of freedom in a photon. This paper reviews the basic techniques and technological challenges of 3D integrated photonics fabricated using ultrafast laser inscription as well as reviews the most recent progress in the fields of astrophotonics, optical communication, quantum photonics, emulation of quantum systems, optofluidics and sensing.

show abstract

“…In fact, this maskless technique allows one to rapidly prototype high-quality photonic circuits in glass with a very fast optimization loop; this technique is also a cost-effective process. This technique produces low birefringence waveguides, which are required for the polarization encoding of single photons [14][15][16] , and has unique three-dimensional capabilities that enable unprecedented device layouts [17][18][19] . Using this technology for devices operating in the telecom band can add further advantages because the insertion losses of these devices in an optical fiber network are very low, due to the almost perfect mode matching and the reduced propagation losses 20,21 .…”

Section: Introductionmentioning

confidence: 99%

Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining

et al. 2015

View full text Add to dashboard Cite

The importance of integrated quantum photonics in the telecom band is based on the possibility of interfacing with the optical network infrastructure that was developed for classical communications. In this framework, femtosecond laser-written integrated photonic circuits, which have already been assessed for use in quantum information experiments in the 800-nm wavelength range, have great potential. In fact, these circuits, being written in glass, can be perfectly mode-matched at telecom wavelength to the in/out coupling fibers, which is a key requirement for a low-loss processing node in future quantum optical networks. In addition, for several applications, quantum photonic devices must be dynamically reconfigurable. Here, we experimentally demonstrate the high performance of femtosecond laser-written photonic circuits for use in quantum experiments in the telecom band, and we demonstrate the use of thermal shifters, which were also fabricated using the same femtosecond laser, to accurately tune such circuits. State-of-the-art manipulation of single-and two-photon states is demonstrated, with fringe visibilities greater than 95%. The results of this work open the way to the realization of reconfigurable quantum photonic circuits based on this technological platform.

show abstract

Non-classical interference in integrated 3D multiports

Cited by 54 publications

References 35 publications

Multiphoton quantum interference in a multiport integrated photonic device

Multiphoton quantum interference in a multiport integrated photonic device

Ultrafast-laser-inscribed 3D integrated photonics: challenges and emerging applications

Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining

Contact Info

Product

Resources

About