Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • 2013 Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
  • (Optica Publishing Group, 2013),
  • paper CFIE_13_4

Photoexcitation Cascade and Multiple Hot Carrier Generation in Graphene

Not Accessible

Your library or personal account may give you access

Abstract

For many optoelectronic applications, such as photodetection and light harvesting, it is highly desirable to identify materials in which an absorbed photon is efficiently converted to electronic excitations. The unique properties of graphene, such as its gapless band structure, flat absorption spectrum and strong electron-electron interactions, make it a highly promising material for efficient broadband photon-electron conversion [1]. Indeed, recent theoretical work has anticipated that in graphene multiple electron-hole pairs can be created from a single absorbed photon during energy relaxation of the primary photoexcited e-h pair [2]. A photoexcited carrier relaxes initially trough two competing pathways: carrier-carrier scattering and optical phonon emission. In the former process the energy of photoexcited carriers remains in the electron system, being transferred to secondary electrons that gain energy (become hot), whereas in the phonon emission process the energy is lost to the lattice as heat. While recent experiments have shown that photoexcitation of graphene can generate hot carriers [3], it remains unknown how efficient this process is with respect to optical phonon emission.

© 2013 IEEE

PDF Article
More Like This
Photoexcitation Cascade and Multiple Hot Carrier Generation in Graphene

K. J. Tielrooij, J. C. W. Song, S. A. Jensen, A. Centeno, A. Pesquera, A. Zurutuza Elorza, M. Bonn, L. S. Levitov, and F. H. L. Koppens
CFIE_13_4 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2013

Hot-Fermi Carrier Multiplication in Monolayer Graphene

Soonyoung Cha, Seongchu Lim, Jeongmook Choi, Young Hee Lee, and Hyunyong Choi
QTh3D.5 CLEO: QELS_Fundamental Science (CLEO:FS) 2013

Diffusion and energy relaxation of hot carriers in graphene

Brian A. Ruzicka, Lalani K. Werake, Nardeep Kumar, Shuai Wang, Kian Ping Loh, and Hui Zhao
QTuK2 Quantum Electronics and Laser Science Conference (CLEO:FS) 2011

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved