Abstract

We theoretically consider the existence of multiple nonzero components of the second-order nonlinear susceptibility tensor, χ(2), generated via strain-induced symmetry breaking in crystalline silicon. We determine that, in addition to the previously reported χxxy(2) component, the χyyy(2) component also becomes nonzero based on the remaining symmetry present in the strained material. In order to characterize these two nonlinearities, we fabricate Fabry–Perot waveguide resonators on 250 nm thick silicon-on-insulator wafers clad with 180 nm of compressively stressed (1.275GPa) silicon nitride. We measure the shifts in these devices’ modal effective indices in response to several bias electric fields and calculate the χeff,xxy(2) and χeff,yyy(2) nonlinear susceptibility tensor elements induced by the breaking of the guiding material’s inversion symmetry. Through the incorporation of finite element simulations encompassing the theoretical distribution of strain, the applied bias field, and the optical modes supported by the waveguide geometry, we extract two phenomenological scaling coefficients which relate the induced optical nonlinearities to the local strain gradient.

© 2014 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Wavelength dependence of Pockels effect in strained silicon waveguides

Pedro Damas, Xavier Le Roux, David Le Bourdais, Eric Cassan, Delphine Marris-Morini, Nicolas Izard, Thomas Maroutian, Philippe Lecoeur, and Laurent Vivien
Opt. Express 22(18) 22095-22100 (2014)

Observation of second-harmonic generation in silicon nitride waveguides through bulk nonlinearities

Matthew W. Puckett, Rajat Sharma, Hung-Hsi Lin, Mu-han Yang, Felipe Vallini, and Yeshaiahu Fainman
Opt. Express 24(15) 16923-16933 (2016)

Investigation of mid-infrared second harmonic generation in strained germanium waveguides

Francesco De Leonardis, Benedetto Troia, Richard A. Soref, and Vittorio M. N. Passaro
Opt. Express 24(10) 11126-11144 (2016)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription