Luke Helt
Department of Physics and Astronomy
Macquarie University
Australia
Biography
Lecturer in Department of Physics and Astronomy at Macquarie University.
Research Interest
The field of nonlinear optics, first explored over 50 years ago, continues to see improvements in conversion efficiency and reductions in system size today. Advances in materials science research and fabrication techniques are pointing the way to the next generation of nonlinear devices for use in sensors, labs on a chip, and telecommunications systems. While these structures are often studied with respect to classical conversion processes, such as second harmonic generation and four wave mixing, quantum processes such as spontaneous parametric down-conversion (SPDC) and spontaneous four wave mixing (SFWM) have not been as intensely investigated. However, any structure that has been designed to enhance a classical nonlinear optical process will also enhance the corresponding quantum nonlinear optical process, and thus many structures exist today that could potentially be used for the generation of entangled photon pairs and heralded single photons.
Publications
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Helt LG, Steel MJ. Effect of scattering loss on connections between classical and quantum processes in second-order nonlinear waveguides. Optics letters. 2015 Apr 1;40(7):1460-3.
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Xiong C, Zhang X, Liu Z, Collins MJ, Mahendra A, Helt LG, Steel MJ, Choi DY, Chae CJ, Leong PH, Eggleton BJ. Active temporal multiplexing of indistinguishable heralded single photons. Nature communications. 2016 Mar 21;7.
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Tischler N, Buese A, Helt LG, Juan ML, Piro N, Ghosh J, Steel MJ, Molina-Terriza G. Measurement and shaping of biphoton spectral wave functions. Physical review letters. 2015 Nov 3;115(19):193602.
