Theoretical analysis of injection driven thermal light emitters based on graphene encapsulated by hexagonal boron nitride

Abstract

We develop the device model for the proposed injection (electrically) driven thermal light emitters (IDLEs) based on the vertical Hexagonal Boron Nitride Layer/Graphene Layer/ Hexagonal Boron Nitride Layer (hBNL/GL/hBNL) heterostructures and analyze their dynamic response. The operation of the IDLEs is associated with the light emission of the hot two-dimensional electron-hole plasma (2DEHP) generated in the GL by both the lateral injection from the side contacts and the vertical injection through the hBNL (combined injection) heating the 2DEHP. The temporal variation of the injection current results in the variation of the carrier effective temperature and their density in the GL leading to the modulation of the output light. We determine the mechanisms limiting the IDLE efficiency and the maximum light modulation frequency. A large difference between the carrier and lattice temperatures the IDLEs with an effective heat removal enables a fairly large modulation depth at the modulation frequencies about dozen of GHz in contrast to the standard incandescent lamps. We compare the IDLEs with the combined injection under consideration and IDLEs using the carrier Joule heating by lateral current. The obtained results can be used for the IDLE optimization.

arXiv comment19 pages, 6 figures

References in corpus (21)

• Graphene Photonics and Optoelectronics
• Ultrafast graphene photodetector
• Light-emitting diodes by bandstructure engineering in van der Waals heterostructures
• Graphene Plasmonics for Terahertz to Mid-Infrared Applications
• The Renaissance of Black Phosphorus
• Phonon anharmonicities in graphite and graphene
• Bright visible light emission from graphene
• Thermal infrared emission reveals the Dirac point movement in biased graphene
• Femtosecond Population Inversion and Stimulated Emission of Dense Dirac Fermions in Graphene
• Carrier Recombination and Generation Rates for Intravalley and Intervalley Phonon Scattering in Graphene
• Slow imbalance relaxation and thermoelectric transport in graphene
• Toward the creation of terahertz graphene injection laser
• Terahertz lasers based on optically pumped multiple graphene structures with slot-line and dielectric waveguides
• Ultrafast Graphene Light Emitter
• High thermal conductivity of hexagonal boron nitride laminates
• Electrical 2π phase control of infrared light in a 350nm footprint using graphene plasmons
• Temperature dependence of the anharmonic decay of optical phonons in carbon nanotubes and graphite
• Teraherz photomixing using plasma resonances in double-graphene layer structures
• Amplification of surface plasmons in graphene-black phosphorus injection laser heterostructures
• Negative photoconductivity and hot-carrier bolometric detection of terahertz radiation in graphene-phosphorene hybrid structures
• Infrared photodetectors based on graphene van der Waals heterostructures