Polymer-encapsulated organic nanocrystals for single photon emission

Schofield, Ross C.; Bogusz, Dominika P.; Hoggarth, Rowan A.; Nur, Salahuddin; Major, Kyle D.; Clark, Alex S.

doi:10.1364/ome.396942

Cited by 8 publications

(9 citation statements)

References 36 publications

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“…We analyse fluorescence excitation spectra of a further 25 DBT molecules, showing an inhomogeneous broadening of several nm for stable single molecule emission, typical for DBT in other PAHs [25] . The observed emission wavelength of DBT in pT is compatible with atomic quantum technologies based on potassium (

4 S_{1 / 2} \leftrightarrow 4 P_{1 / 2}

transition) and rubidium

(4 P_{3 / 2} \leftrightarrow 5 D_{3 / 2}

transition).…”

Section: Introductionmentioning

confidence: 63%

“…After growth a droplet of this solution was deposited onto a silicon nitride on silica on silicon substrate and allowed to evaporate, leaving behind nanocrystals as shown in the white light microscopy image in Figure 1(b). Identical growth conditions to Ac nanocrystals were used, [25] apart from an increase in growth time from 30 min to 45 min. We determined the size of nanocrystals after growth by analysing scanning electron microscope (SEM) images.…”

Section: Resultsmentioning

confidence: 99%

“…Size determined from side length taken from SEM images. Distribution can be further tailored using filtering after growth [22,25] . Inset: Close up SEM image of a single nanocrystal.…”

Section: Resultsmentioning

confidence: 99%

“…The pT nanocrystals are robust to sublimation and can be filtered to select a desired nanocrystal size for particular applications. The small size of these nanocrystals makes them ideal for integration into nanophotonic structures, either directly [26] or after protection in a polymer shell, [25] enabling their use in future photonic quantum devices.…”

Section: Introductionmentioning

confidence: 99%

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Narrow and Stable Single Photon Emission from Dibenzoterrylene inpara‐Terphenyl Nanocrystals

et al. 2022

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Single organic molecules are promising photon sources for quantum technologies. In this work we show photon emission from dibenzoterrylene, a widely used organic emitter, in a new host matrix, para‐terphenyl. We present a reprecipitation growth method that produces para‐terphenyl nanocrystals which are ideal for integration into nanophotonic devices due to their small size. We characterise the optical properties of dibenzoterrylene in nanocrystals at room and cryogenic temperatures, showing bright, narrow emission from a single molecule. Spectral data on the vibrational energies is presented and a further 25 additional molecules are characterised. This emitter‐host combination has potential for quantum technology purposes with wavelengths suitable for interfacing with quantum memories.

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4 S_{1 / 2} \leftrightarrow 4 P_{1 / 2}

transition) and rubidium

(4 P_{3 / 2} \leftrightarrow 5 D_{3 / 2}

transition).…”

Section: Introductionmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 99%

“…Size determined from side length taken from SEM images. Distribution can be further tailored using filtering after growth [22,25] . Inset: Close up SEM image of a single nanocrystal.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Narrow and Stable Single Photon Emission from Dibenzoterrylene inpara‐Terphenyl Nanocrystals

et al. 2022

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“…1b) and due to electron-phonon coupling part of the emission is red-shifted compared to the excitation light, meaning they can be separated with standard optical filters. After the first demonstration of single-molecule fluorescence detection at cryogenic temperature [12], this almost background-free technique has enabled single-molecule experiments at room temperature in a wide spread of disciplines such as biology [13] and material science [14].…”

Section: Basics Of Single-molecule Photophysicsmentioning

confidence: 99%

Single organic molecules for photonic quantum technologies

Toninelli¹,

et al. 2021

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Isolating single molecules in the solid state has allowed fundamental experiments in basic and applied sciences. When cooled down to liquid helium temperature, certain molecules show transition lines, that are tens of megahertz wide, limited only by the excited state lifetime. The extreme flexibility in the synthesis of organic materials provides, at low costs, a wide palette of emission wavelengths and supporting matrices for such single chromophores. In the last decades, the controlled coupling to photonic structures has led to an optimized interaction efficiency with light. Molecules can hence be operated as single photon sources and as non-linear elements with competitive performance in terms of coherence, scalability and compatibility with diverse integrated platforms. Moreover, they can be used as transducers for the optical read-out of fields and material properties, with the promise of single-quanta resolution in the sensing of charges and motion. We show that quantum emitters based on single molecules hold promise to play a key role in the development of quantum science and technologies.Modern societies have an ever-growing need for efficient computation techniques and for fast and secure communication, to distribute a huge amount of data around the globe. By harnessing quantum effects present at the nanoscale, new quantum technologies can be employed to meet these needs, including quantum cryptography and fully-fledged quantum information processing. On the other hand, the extreme sensitivity of quantum systems to their local environment can be exploited to also create new sensing devices, which provide unprecedented precision, accuracy and resolution and can be deployed within large quantum networks. Key applications require the generation and manipulation of quantum states of light, such as photonic quantum simulation [1, 2], linear optical quantum computing [3], device-independent or long-distance quantum key distribution protocols [4], sub-shot-noise imaging [5] and quantum metrology [6,7]. In this context, single impurities in solid-state systems can act as bright, on-demand single-photon sources (SPSs), which are a crucial resource in these photonic quantum technologies. Quantum emitters may also perform as non-linear elements at the few-photon level [8] and as nanoscale sensors, allowing the optical read-out of local properties of materials and fields. In this context, single molecules in the solid-state offer competitive and reliable properties, with several key advantages. First, they are very small and have well-defined transition dipole moments so that they can be used as nanoscopic sensors for a number of scalar and vector quantities such as pressure, strain, temperature, electric and magnetic fields, as well as optical fields. Second, organic molecules can be designed and synthesized for different parts of the visible spectrum and integrated in a range of organic matrices, a feature that is a severe limiting factor for color centers in diamond or lithographically produced semiconductor quan...

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