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

Year: 2017

Authors: Chen HT., 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

More Information: H Chen acknowledges financial support from the China Scholarship Council for PhD scholarship no. 201206110047. We would like to acknowledge support from the Australian Research Council through Discovery Projects and participation in the Erasmus Mundus NANOPHI project, contract number 2013 5659/002-001. Device fabrication was supported by the ACT node of the Australian National Fabrication Facility.
KeyWords: 2D material; MoSe2; SHG; waveguide
DOI: 10.1038/lsa.2017.60

Citations: 126
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