Published/Posted: January 16, 2021

Authors: Chin, M. L.; Matschy, S.; Stawitzki, F.; Poojali, J.; Hafez, H. A.; Turchinovich, D.; Winnerl, S.; Kumar, G.; Ward, R. L. Myers; Dejarld, M. T.; Daniels, K. M.; Drew, H. D.; Murphy, T. E.; Mittendorf, M.

DOI: 10.1088/2515-7647/abd7d0

Abstract: Graphene patterned into plasmonic structures like ribbons or discs strongly increases the linear and nonlinear optical interaction at resonance. The nonlinear optical response is governed by hot carriers, leading to a red-shift of the plasmon frequency. In magnetic fields, the plasmon hybridizes with the cyclotron resonance, resulting in a splitting of the plasmonic absorption into two branches. Here we present how this splitting can be exploited to tune the nonlinear optical response of graphene discs. In the absence of a magnetic field, a strong pump-induced increase in on-resonant transmission can be observed, but fields in the range of 3 T can change the characteristics completely, leading to an inverted nonlinearity. A two temperature model is provided that describes the observed behavior well.

Citation:
M. L. Chin, S. Matschy, F. Stawitzki, J. Poojali, H. A. Hafez, D. Turchinovich, S. Winnerl, G. Kumar, R. L. Myers-Ward, M. T. Dejarld, K. M. Daniels, H. D. Drew, T. E. Murphy and M. Mittendorff, "Observation of strong magneto plasmonic nonlinearity in bilayer graphene discs", J. Phys. Photonics 3(1) 01LT01 (2021)
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Manuscript: Chin_JPhysPhoton_3_01LT01_2021.pdf

Observation of strong magneto plasmonic nonlinearity in bilayer graphene discs