Related papers: Super-resolved reconstruction of single-photon emitter locations from $g^{(2)}(0)$ maps

Super-resolved reconstruction of single-photon emitter locations from $g^{(2)}(0)$ maps

URL: http://arxiv.org/abs/2511.01279v1
Date: Mon, 03 Nov 2025 06:54:43 GMT
Title: Super-resolved reconstruction of single-photon emitter locations from $g^{(2)}(0)$ maps
Authors: Sonali Gupta, Amit Kumar, Vikas S Bhat, Sushil Mujumdar,
Abstract summary: Nitrogen-vacancy (NV) centers in diamond are promising due to their room-temperature stability, long spin, and compatibility with nanophotonic structures.<n> conventional confocal microscopy is diffractionlimited and cannot resolve emitter distributions within a focal spot.<n>Here, we introduce a spatial-canned coherences-canned mapping technique combined with an inversion-based reconstruction algorithm.
Score: 3.325210194760956
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Single-photon sources are vital for emerging quantum technologies. In particular, Nitrogen-vacancy (NV) centers in diamond are promising due to their room-temperature stability, long spin coherence, and compatibility with nanophotonic structures. A key challenge, however, is the reliable identification of isolated NV centers, since conventional confocal microscopy is diffraction-limited and cannot resolve emitter distributions within a focal spot. Besides, the associated intensity scanning is a time-expensive procedure. Here, we introduce a raster-scanned $g^{(2)}(0)$ mapping technique combined with an inversion-based reconstruction algorithm. By directly measuring local photon antibunching across the field of view, we extract the effective emitter number within each focal spot and reconstruct occupancy maps on a sub-focal-spot grid. This enables recovery of the number and spatial distribution of emitters within regions smaller than the confocal focal spot, thereby offering possibilities of going beyond the diffraction limit. Our simulations confirm robust reconstruction of NV-center distributions. The method provides a practical diagnostic tool for locating single-photon sources in an efficient and accurate manner, at much lesser time and effort compared to conventional intensity scanning. It offers valuable feedback for nanophotonic device fabrication, supporting more precise and scalable integration of NV-based quantum photonic technologies.

Related papers

Integrated polarization-entangled photon source for wavelength-multiplexed quantum networks [49.82426139329382]
We present a simple yet high-performance on-chip polarization-entangled photon-pair source on thin-film lithium niobate (TFLN)<n>Our device employs dual quasi-phase matching (D-QPM) that sequentially supports type-0 and type-I spontaneous parametric down-conversion in a single nanophotonic waveguide.<n>We realize wavelength-multiplexed entanglement distribution in a four-user quantum network deployed over metropolitan fiber links up to 50 km.
arXiv Detail & Related papers (2025-11-27T18:30:01Z)
Quantum Limited Spatial Resolution of NV-Diamond Magnetometry [0.6384650391969042]
In this work, we employ optical spatial mode demultiplexing (SPADE) to enhance localization and brightness estimation accuracy at sub-diffraction scales.<n>We numerically evaluate the statistical performance of our protocol for sub-diffraction optically detected magnetic resonance (ODMR) and Rabi sensing experiments.
arXiv Detail & Related papers (2025-08-19T01:39:03Z)
Harnessing individual nitrogen-vacancy centers with a compact and portable confocal microscope [36.136619420474766]
Recent advancements in quantum technology have highlighted the potential of nitrogen-vacancy (NV) centers in diamond. We present a compact and portable confocal setup specifically designed for the efficient detection and control of single NV centers.
arXiv Detail & Related papers (2024-10-07T11:35:46Z)
Ultra-high strained diamond spin register with coherent optical link [45.40010446596688]
Solid-state spin defects, such as color centers in diamond, are among the most promising candidates for scalable and integrated quantum technologies. We show that leveraging an ultra-high strained silicon-vacancy center inside a nanodiamond allows us to coherently and efficiently control its electron spin, while mitigating phonon-induced dephasing at liquid helium temperature. Our work paves the way for future integration of quantum network registers into conventional, well-established photonics and hybrid quantum communication systems.
arXiv Detail & Related papers (2024-09-19T10:46:24Z)
High-dimensional quantum correlation measurements with an adaptively gated hybrid single-photon camera [58.720142291102135]
We propose an adaptively-gated hybrid intensified camera (HIC) that combines a high spatial resolution sensor and a high temporal resolution detector. With a spatial resolution of nearly 9 megapixels and nanosecond temporal resolution, this system allows for the realization of previously infeasible quantum optics experiments.
arXiv Detail & Related papers (2023-05-25T16:59:27Z)
On-chip quantum information processing with distinguishable photons [55.41644538483948]
Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
arXiv Detail & Related papers (2022-10-14T18:16:49Z)
Multidimensional cluster states using a single spin-photon interface coupled strongly to an intrinsic nuclear register [48.7576911714538]
Photonic cluster states are a powerful resource for measurement-based quantum computing and loss-tolerant quantum communication. We propose the generation of multi-dimensional lattice cluster states using a single, efficient spin-photon interface coupled strongly to a nuclear register.
arXiv Detail & Related papers (2021-04-26T14:41:01Z)
Hybrid quantum photonics based on artificial atoms placed inside one hole of a photonic crystal cavity [47.187609203210705]
Hybrid quantum photonics with SiV$-$-containing nanodiamonds inside one hole of a one-dimensional, free-standing, Si$_3$N$_4$-based photonic crystal cavity is presented. The resulting photon flux is increased by more than a factor of 14 as compared to free-space. Results mark an important step to realize quantum network nodes based on hybrid quantum photonics with SiV$-$- center in nanodiamonds.
arXiv Detail & Related papers (2020-12-21T17:22:25Z)
Photophysics of single nitrogen-vacancy centers in nanodiamonds coupled to photonic crystal cavities [0.0]
We modify the internal quantum efficiency of a single NV center in a nanodiamond coupled to a 1D photonic crystal cavity. We find that the enhancement of the radiative decay rate via the Purcell effect results in an internal quantum efficiency of 90 %. Our findings will facilitate the realization of nano-scale single photon sources with near-unity internal quantum efficiencies operating at high repetition rates.
arXiv Detail & Related papers (2020-11-22T21:29:45Z)
Resonant Excitation and Purcell Enhancement of Coherent Nitrogen-Vacancy Centers Coupled to a Fabry-P\'{e}rot Micro-Cavity [0.0]
nitrogen-vacancy (NV) center in diamond has been established as a prime building block for quantum networks. Poor optical coherence of near-surface NV centers has so far prevented their resonant optical control, as would be required for entanglement generation. We demonstrate resonant addressing of individual, fiber-cavity-coupled NV centers, and collection of their Purcell-enhanced coherent photon emission.
arXiv Detail & Related papers (2020-09-17T10:48:16Z)
Inverse-designed photon extractors for optically addressable defect qubits [48.7576911714538]
Inverse-design optimization of photonic devices enables unprecedented flexibility in tailoring critical parameters of a spin-photon interface. Inverse-designed devices will enable realization of scalable arrays of single-photon emitters, rapid characterization of new quantum emitters, sensing and efficient heralded entanglement schemes.
arXiv Detail & Related papers (2020-07-24T04:30:14Z)

This list is automatically generated from the titles and abstracts of the papers in this site.