Nanolaser with a Single-Graphene-Nanoribbon in a Microcavity

Abstract

In this work, I propose a scheme about a single graphene nanoribbon (GNR) emitter in a microcavity, and focus on a fully-quantum-mechanical treatment model with the excitonic interaction included to investigate the photon properties and lasing action. When the single armchair-edged GNRs (AGNRs) microcavity system is pumped, the exciton-photon coupling provides more photons and enhances the photon emission process, making it essentially a lasing object. The theoretical results demonstrated that single AGNR in a semiconductor microcavity system maybe serve as a nanolaser with ultralow lasing threshold.

Vertical-external-cavity surface-emitting lasers and quantum dot lasers

“…Recently, such a coupled system consisting of a nanocavity and a QD shown in Fig. 4(c) has been further extensively investigated because of its promising applications such as quantum information processing [4,[83][84][85][86], single photon sources [1,81,85], and ultimately low-threshold nanolasers [78,80,[86][87][88][89]. For such a single QD PhC nanocavity system, utilization of a single mode cavity with a sufficiently high Q factor as a lasing mode, the modal volume of which should be as small as possible to maximize the interaction with the single QD gain medium, is key to realize a thresholdless QD nanolaser.…”

Dynamics and modulation characteristics of graphene nanoribbon array lasers

“…On the other hand, graphene has extraordinary electronic and optical properties and holds great promise for applications in photonics and optoelectronics [6]- [12]. Recent advances in fabricating and characterizing stable GNRs have paved the way to functioning as one of the building blocks for nanophotonic devices and circuits [7]- [ 12].…”

“…Recent advances in fabricating and characterizing stable GNRs have paved the way to functioning as one of the building blocks for nanophotonic devices and circuits [7]- [ 12]. Demonstrations including high speed photodetectors, optical modulators, plasmonic devices, and ultrafast lasers have now been reported [8]- [ 12].…”

“…Recent advances in fabricating and characterizing stable GNRs have paved the way to functioning as one of the building blocks for nanophotonic devices and circuits [7]- [ 12]. Demonstrations including high speed photodetectors, optical modulators, plasmonic devices, and ultrafast lasers have now been reported [8]- [ 12]. Moreover, depending on specific GNRs, theoretical studies using tight binding or massless Dirac fermion equation approaches have predicted GNRs to be either metals or semiconductors [12], [13], whereas density functional theory (DFT ) calculations showed that all armchair-edged GNRs (AGNRs) are semiconducting with an energy gap scaling with the inverse of the GNR width [14].…”

“…Demonstrations including high speed photodetectors, optical modulators, plasmonic devices, and ultrafast lasers have now been reported [8]- [ 12]. Moreover, depending on specific GNRs, theoretical studies using tight binding or massless Dirac fermion equation approaches have predicted GNRs to be either metals or semiconductors [12], [13], whereas density functional theory (DFT ) calculations showed that all armchair-edged GNRs (AGNRs) are semiconducting with an energy gap scaling with the inverse of the GNR width [14]. In particular, first-principle many-electron Green's function approach studies within the GW approximation [15] have shown the quasi-particle band gap of AG NRs is in the interesting energy range of 1-3 eV for 2-1 nm wide GNRs due to many-electron effects, and they may find applications in low cost nanolasers and transmitter modules by releasing the need for temperature control, isolators, and external modulators.…”