Abstract:Semiconducting single-walled carbon nanotubes are one-dimensional materials with great prospects for applications such as optoelectronic and quantum information devices. Yet, their optical performance is hindered by low fluorescent yield. Highly mobile excitons interacting with quenching sites are attributed to be one of the main non-radiative decay mechanisms that shortens the exciton lifetime. In this paper we report on time-integrated photoluminescence measurements on individual polymer wrapped semiconducti… Show more
“…For instance, a high precision electrometer was recently fabricated, using the Schrödinger's cat state with a single atom in a superposition of two circular Rydberg states [13] . The other major choices of SPEs include trapped ions [14][15][16] , single quantum dots (QD) [17] , nitrogen vacancy centers [18] in diamond, organic molecules [19] , carrier localization centers in 2D materials [20][21][22] , and recently carbon nanotubes [23,24] .…”
Single-photon emitters (SPEs) are one of the key components in quantum information applications. The ideal SPEs emit a single photon or a photon-pair on demand, with high purity and distinguishability. SPEs can also be integrated in photonic circuits for scalable quantum communication and quantum computer systems. Quantum dots made from III-V compounds such as InGaAs or GaN have been found to be particularly attractive SPE sources due to their well studied optical performance and state of the art industrial flexibility in fabrication and integration. Here, we review the optical and optoelectronic properties and growth methods of general SPEs. Subsequently, a brief summary of the latest advantages in III-V compound SPEs and the research progress achieved in the past few years will be discussed. We finally describe frontier challenges and conclude with the latest SPE fabrication science and technology that can open new possibilities for quantum information applications.
“…For instance, a high precision electrometer was recently fabricated, using the Schrödinger's cat state with a single atom in a superposition of two circular Rydberg states [13] . The other major choices of SPEs include trapped ions [14][15][16] , single quantum dots (QD) [17] , nitrogen vacancy centers [18] in diamond, organic molecules [19] , carrier localization centers in 2D materials [20][21][22] , and recently carbon nanotubes [23,24] .…”
Single-photon emitters (SPEs) are one of the key components in quantum information applications. The ideal SPEs emit a single photon or a photon-pair on demand, with high purity and distinguishability. SPEs can also be integrated in photonic circuits for scalable quantum communication and quantum computer systems. Quantum dots made from III-V compounds such as InGaAs or GaN have been found to be particularly attractive SPE sources due to their well studied optical performance and state of the art industrial flexibility in fabrication and integration. Here, we review the optical and optoelectronic properties and growth methods of general SPEs. Subsequently, a brief summary of the latest advantages in III-V compound SPEs and the research progress achieved in the past few years will be discussed. We finally describe frontier challenges and conclude with the latest SPE fabrication science and technology that can open new possibilities for quantum information applications.
“…This result is based on the estimate that λ = 10 meV. Both the coherence time and the exciton life time, which is estimated to be in the order of 10 ps 41 , are much larger than the exciton transfer time in a 4 nm (3,3) CNT (see Fig. 7).…”
Section: Introductionmentioning
confidence: 93%
“…Although the extended states of CNTs make this intuitively reasonable, a reorganization energy of tens of meV has been reported in a recent experiment 39 . The reorganization energy estimated by the peak width of photoluminescence spectra ranges from tens of meV 40 to as low as 1 meV 41 . This is comparable to the most rigid porphyrins 42,43 .…”
Carbon nanotubes are explored as a means of coherently converting the orbital angular momentum of light to an excitonic form that is more amenable to quantum information processing. An analytical analysis, based on dynamical conductivity, is used to show that orbital angular momentum is conserved, modulo N, for a carbon nanotube illuminated by radially polarized, twisted light. This result is numerically demonstrated using real-time time-dependent density functional theory which captures the absorption of twisted light and the subsequent transfer of twisted excitons. The results suggest that carbon nanotubes are promising candidates for constructing optoelectronic circuits in which quantum information is more readily processed while manifested in excitonic form.
“…One long-term goal in bio-nanotechnology has been to mimic the properties of microtubules and microtubule bundles to produce new functional nanomaterials ( 8 ). Conversely, the resemblance of microtubules to CNTs suggests that tubulin and microtubules could possibly serve as units for optoelectronic and quantum information devices in cells, such as axons and dendrites in neurons ( 9 ). Figure 1 ( A ) Tubulin heterodimer surface with α-tubulin monomer in light gray and β-tubulin monomer in dark grey (scale bar, ∼5 nm).…”
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