CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 10345 > Article
Presentation
29 September 2017 Instantaneous and transient nonlinearities of graphene plasmons (Conference Presentation)
Joel D. Cox, Javier García de Abajo
Author Affiliations +
Proceedings Volume 10345, Active Photonic Platforms IX; 1034516 (2017) https://doi.org/10.1117/12.2273932
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States
Abstract
Graphene exhibits a remarkably high intrinsic nonlinearity that can be pushed even further when the optical frequency is tuned to the plasmon resonances of the material. Atomistic simulations provide an accurate description of these phenomena, although their computational cost is prohibitive for large graphene nanostructures. In the weak-field, cw regime, an alternative formalism consists in relying on classical electromagnetism, using the local nonlinear conductivities extracted from perturbative models of extended graphene. We show that both of these approaches are in excellent agreement for sufficiently-large structures (10s of nm in lateral size) when describing second- and third-harmonic generation, as well as the Kerr nonlinearity. Additionally, we exploit an eigenmode decomposition of the optical field in the classical formalism to obtain analytical expressions for the plasmon-driven response of graphene ribbons and finite islands, in excellent agreement with atomistic calculations. In contrast to the instantaneous nonlinear response, where input and output fields maintain relative coherences, a delayed nonlinearity also takes place as a consequence of the strong dependence of the graphene response on the temperature of its conduction electrons. Here we show that transient plasmons arising from the elevated electronic temperature in graphene upon ultrafast optical pumping can produce strong modulations of the optical absorption. Our nonperturbative time-domain simulations indicate that the strong incoherent nonlinearity associated with plasmons in doped graphene nanostructures can be used for all-optical switching in nonlinear optical devices.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Joel D. Cox and Javier García de Abajo "Instantaneous and transient nonlinearities of graphene plasmons (Conference Presentation)", Proc. SPIE 10345, Active Photonic Platforms IX, 1034516 (29 September 2017); https://doi.org/10.1117/12.2273932
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 PRESENTATION
WATCH
PRESENTATION SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
KEYWORDS
Graphene
Plasmons
Plasmonics
Transient nonlinear optics
Nanostructures
Nonlinear response
Harmonic generation
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top