Enhanced second-harmonic generation from two-dimensional MoSe2 on a silicon waveguide

Year: 2017

Authors: Chen H., Corboliou V., Solntsev AS., Choi DY., Vincenti MA., de Ceglia D., De Angelis C., Lu YR., Neshev DN.

Autors Affiliation: Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia; Univ Paris Sud, Inst Opt, Grad Sch, F-91127 Palaiseau, France; Australian Natl Univ, Res Sch Phys & Engn, Laser Phys Ctr, Canberra, ACT 2601, Australia; CNR, Charles M Bowden Lab, Valhermoso Springs, AL 35898 USA;‎ Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy;‎ Univ Brescia, INO CNR, Via Branze 38, I-25123 Brescia, Italy; Australian Natl Univ, Coll Engn & Comp Sci, Res Sch Engn, Canberra, ACT 2601, Australia

Abstract: Two-dimensional transition-metal dichalcogenides (TMDCs) with intrinsically broken crystal inversion symmetry and large second-order nonlinear responses have shown great promise for future nonlinear light sources. However, the sub-nanometer monolayer thickness of such materials limits the length of their nonlinear interaction with light. Here, we experimentally demonstrate the enhancement of the second-harmonic generation from monolayer MoSe2 by its integration onto a 220-nm-thick silicon waveguide. Such on-chip integration allows for a marked increase in the interaction length between the MoSe2 and the waveguide mode, further enabling phase matching of the nonlinear process. The demonstrated TMDC-silicon photonic hybrid integration opens the door to second-order nonlinear effects within the silicon photonic platform, including efficient frequency conversion, parametric amplification and the generation of entangled photon pairs.

Journal/Review: LIGHT: SCIENCE & APPLICATIONS

Volume: 6      Pages from: e17060-1  to: e17060-7

KeyWords: 2D material; MoSe2; SHG; waveguide
DOI: 10.1038/lsa.2017.60

Citations: 84
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