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Novel Light-Matter Interaction in Quasi-One-Dimensional Graphene Nanomaterials for Photonics


Kishore Kumar, Deepan (2021) Novel Light-Matter Interaction in Quasi-One-Dimensional Graphene Nanomaterials for Photonics. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/y5a2-zx57.


Nonlinear light-matter interaction in two-dimensional (2D) materials like graphene with unique nanostructured quasi-one-dimensionality (quasi-1D) holds the potential to address major technology opportunities in photonics from on-chip photo detection, modulation of light, and even possibly coherent light sources. In this work, we propose to use graphene, a gapless two-dimensional nanomaterial, for both nano-photonic applications and potentially energy harvesting by nano-structuring the material into nearly quasi-one-dimensional effective optical cavities with defects that act like color centers. These defects are naturally formed during its synthesis or can be engineered in the material by selective plasma radiation, is found to support a broad spectral distribution of color centers that exhibit excitation dependent photoluminescence. Through detailed investigation on the temperature and power dependence of photoluminescence from such defects, excitation dependent photoluminescence emission, we have established that these graphene nanomaterials with metastable energy states can support material excitations (e.g., excitons) that are strongly coupled to the optical modes confined within the nanostructured cavities to produce polaritonic quasiparticles, leading to many interesting nonlinear behaviors. In particular, the manifestation of blue-shifted photoluminescence, polariton lasing-like emission, multimode lasing-like emission, and distinct interference fringes, all points to the presence of novel light-matter interaction in quasi-one-dimensional graphene. Such novel light matter interactions can be exploited, among other applications, within photonic integrated circuits (PIC) by directly synthesizing graphene on silicon from a low temperature, single-step, plasma-enhanced chemical vapor deposition (PECVD) with feedstock gases of methane and hydrogen.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Graphene, Photonics, 2D Materials, Nanolasers
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Electrical Engineering
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Yeh, Nai-Chang
Thesis Committee:
  • Marandi, Alireza (chair)
  • Yariv, Amnon
  • Mirhosseini, Mohammad
  • Yeh, Nai-Chang
Defense Date:21 May 2021
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-16-1-0472
United Advanced MaterialsUNSPECIFIED
Record Number:CaltechTHESIS:05282021-182147719
Persistent URL:
Kishore Kumar, Deepan0000-0003-0236-8805
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14193
Deposited By: Deepan Kishore Kumar
Deposited On:02 Jun 2021 23:50
Last Modified:10 Jan 2022 17:38

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