We report photonic quantum circuits created using an ultrafast laser processing technique that is rapid, requires no lithographic mask and can be used to create three-dimensional networks of waveguide devices. We have characterized directional couplers--the key functional elements of photonic quantum circuits--and found that they perform as well as lithographically produced waveguide devices. We further demonstrate high-performance interferometers and an important multi-photon quantum interference phenomenon for the first time in integrated optics. This direct-write approach will enable the rapid development of sophisticated quantum optical circuits and their scaling into three-dimensions.
@article{arxiv.0902.4357,
title = {Laser written waveguide photonic quantum circuits},
author = {G. D. Marshall and A. Politi and J. C. F. Matthews and P. Dekker and M. Ams and M. J. Withford and J. L. O'Brien},
journal= {arXiv preprint arXiv:0902.4357},
year = {2011}
}
Comments
4 pages, 4 figures. Submitted to Optics Express 04/04/2009, accepted for publication 30/06/09