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Autor: Grafiati

Data publikacji: 27 lipca 2024

Data aktualizacji: 28 lipca 2024

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1

Ahmadian, Azadeh, i Rasoul Malekfar. "Investigation of the Time Behavior of the Second-Order Coherence Function of a Tunable Single-Photon Source". Journal of Spectroscopy 2021 (2.06.2021): 1–7. http://dx.doi.org/10.1155/2021/8811424.

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Single-photon sources are critical optical components in quantum communication, in particular, for security applications. One of the essential parameters that define these sources is the magnitude of the second-order coherence function, whose investigation reveals the state of the emitted photon. In this study, we indicate that the second-order coherence function varies over time when using two lasers and preparing coherent population trapping. The calculation is based on solving the master equation to find the density matrix corresponding to the emission dynamics and provide the second-order coherence function. The changes of the second-order coherence function can be estimated and the system behavior regarding photon emission can be predicted by solving the master equation based on the parameters obtained from the experimental results of a nitrogen vacancy (NV) in a diamond. Here we report, for the first time to the best of our knowledge, that the state of the emitted photons persists in the strong interaction of the aforementioned process. As using two lasers is a familiar method for controlling the single-photon source and the stability of the source is an essential point in a quantum network, this study can be considered to develop quantum network components such as memory and on-demand single-photon sources. Also, it suggests a method for tuning photon statistics while controlling the photon states.

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Haase, Albrecht, Nicolas Piro, Jürgen Eschner i Morgan W. Mitchell. "Tunable narrowband entangled photon pair source for resonant single-photon single-atom interaction". Optics Letters 34, nr 1 (24.12.2008): 55. http://dx.doi.org/10.1364/ol.34.000055.

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3

Steiner, Mathias, Achim Hartschuh, Rafał Korlacki i Alfred J. Meixner. "Highly efficient, tunable single photon source based on single molecules". Applied Physics Letters 90, nr 18 (30.04.2007): 183122. http://dx.doi.org/10.1063/1.2736294.

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4

Matsuda, Ken-ichi, Noriyuki Hatakenaka, Hideaki Takayanagi i Tetsuro Sakuma. "Tunable single-photon source using Korteweg–de Vries solitons". Applied Physics Letters 81, nr 15 (7.10.2002): 2698–700. http://dx.doi.org/10.1063/1.1512942.

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5

Shen, Lijiong, Jianwei Lee, Antony Winata Hartanto, Pengkian Tan i Christian Kurtsiefer. "Wide-range wavelength-tunable photon-pair source for characterizing single-photon detectors". Optics Express 29, nr 3 (21.01.2021): 3415. http://dx.doi.org/10.1364/oe.409532.

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6

Li, Rusong, Fengqi Liu i Quanyong Lu. "Quantum Light Source Based on Semiconductor Quantum Dots: A Review". Photonics 10, nr 6 (1.06.2023): 639. http://dx.doi.org/10.3390/photonics10060639.

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Quantum light sources that generate single photons and entangled photons have important applications in the fields of secure quantum communication and linear optical quantum computing. Self-assembled semiconductor quantum dots, also known as “artificial atoms”, have discrete energy-level structures due to electronic confinement in all three spatial dimensions. It has the advantages of high stability, high brightness, deterministic, and tunable emission wavelength, and is easy to integrate into an optical microcavity with a high-quality factor, which can realize a high-performance quantum light source. In this paper, we first introduce the generation principles, properties, and applications of single-photon sources in the field of quantum information and then present implementations and development of quantum light sources in self-assembled semiconductor quantum dot materials. Finally, we conclude with an outlook on the future development of semiconductor quantum dot quantum light sources.

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7

Schmidt, Marco, Martin V. Helversen, Sarah Fischbach, Arsenty Kaganskiy, Ronny Schmidt, Andrei Schliwa, Tobias Heindel, Sven Rodt i Stephan Reitzenstein. "Deterministically fabricated spectrally-tunable quantum dot based single-photon source". Optical Materials Express 10, nr 1 (10.12.2019): 76. http://dx.doi.org/10.1364/ome.10.000076.

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8

Nakaoka, Toshihiro, Yugo Tamura, Toshiyuki Miyazawa, Katsuyuki Watanabe, Yasutomo Ota, Satoshi Iwamoto i Yasuhiko Arakawa. "Wavelength Tunable Quantum Dot Single-Photon Source with a Side Gate". Japanese Journal of Applied Physics 51, nr 2S (1.02.2012): 02BJ05. http://dx.doi.org/10.7567/jjap.51.02bj05.

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9

Nakaoka, Toshihiro, Yugo Tamura, Toshiyuki Miyazawa, Katsuyuki Watanabe, Yasutomo Ota, Satoshi Iwamoto i Yasuhiko Arakawa. "Wavelength Tunable Quantum Dot Single-Photon Source with a Side Gate". Japanese Journal of Applied Physics 51, nr 2 (20.02.2012): 02BJ05. http://dx.doi.org/10.1143/jjap.51.02bj05.

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10

Jin, Rui-Bo, Ryosuke Shimizu, Kentaro Wakui, Hugo Benichi i Masahide Sasaki. "Widely tunable single photon source with high purity at telecom wavelength". Optics Express 21, nr 9 (24.04.2013): 10659. http://dx.doi.org/10.1364/oe.21.010659.

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11

Iff, Oliver, Davide Tedeschi, Javier Martín-Sánchez, Magdalena Moczała-Dusanowska, Sefaattin Tongay, Kentaro Yumigeta, Javier Taboada-Gutiérrez i in. "Strain-Tunable Single Photon Sources in WSe2 Monolayers". Nano Letters 19, nr 10 (5.09.2019): 6931–36. http://dx.doi.org/10.1021/acs.nanolett.9b02221.

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12

Borghese, Antonio, i Tonia M. Di Palma. "Laser-plasma-based vacuum-ultraviolet light source for tunable single-photon ionization". Applied Optics 46, nr 22 (3.07.2007): 4948. http://dx.doi.org/10.1364/ao.46.004948.

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Moczała-Dusanowska, Magdalena, Łukasz Dusanowski, Stefan Gerhardt, Yu Ming He, Marcus Reindl, Armando Rastelli, Rinaldo Trotta, Niels Gregersen, Sven Höfling i Christian Schneider. "Strain-Tunable Single-Photon Source Based on a Quantum Dot–Micropillar System". ACS Photonics 6, nr 8 (26.06.2019): 2025–31. http://dx.doi.org/10.1021/acsphotonics.9b00481.

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14

Tang, J. N., W. H. Wu, L. Li, P. Miao, Z. Y. Sun, M. X. Wang i D. L. Xu. "A fast tunable driver of light source for the TRIDENT Pathfinder experiment". Journal of Instrumentation 18, nr 08 (1.08.2023): T08001. http://dx.doi.org/10.1088/1748-0221/18/08/t08001.

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Abstract TRIDENT (The tRopIcal DEep-sea Neutrino Telescope) is a proposed next-generation neutrino telescope to be constructed in the South China Sea. In September 2021, the TRIDENT Pathfinder experiment (TRIDENT EXplorer, T-REX for short) was conducted to evaluate the in-situ optical properties of seawater. The T-REX experiment deployed three digital optical modules at a depth of 3420 meters, including a light emitter module (LEM) and two light receiver modules (LRMs) equipped with photomultiplier tubes (PMTs) and cameras to detect light signals. The LEM emits light in pulsing and steady modes. It features a fast tunable driver to activate light-emitting diodes (LEDs) that emit nanosecond-width light pulses with tunable intensity. The PMTs in the LRM receive single photo-electron (SPE) signals with an average photon number of approximately 0.3 per 1-microsecond time window, which is used to measure the arrival time distribution of the SPE signals. The fast tunable driver can be remotely controlled in real-time by the data acquisition system onboard the research vessel, allowing for convenient adjustments to the driver's parameters and facilitating the acquisition of high-quality experimental data. This paper describes the requirements, design scheme, and test results of the fast tunable driver, highlighting its successful implementation in the T-REX experiment and its potential for future deep-sea experiments.

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15

Benyoucef, Mohamed, Hong Seok Lee, Juliane Gabel, Tae Whan Kim, Hong Lee Park, Armando Rastelli i Oliver G. Schmidt. "Wavelength Tunable Triggered Single-Photon Source from a Single CdTe Quantum Dot on Silicon Substrate". Nano Letters 9, nr 1 (14.01.2009): 304–7. http://dx.doi.org/10.1021/nl802948a.

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16

Munnelly, Pierce, Tobias Heindel, Alexander Thoma, Martin Kamp, Sven Höfling, Christian Schneider i Stephan Reitzenstein. "Electrically Tunable Single-Photon Source Triggered by a Monolithically Integrated Quantum Dot Microlaser". ACS Photonics 4, nr 4 (10.04.2017): 790–94. http://dx.doi.org/10.1021/acsphotonics.7b00119.

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17

Utzat, Hendrik, Weiwei Sun, Alexander E. K. Kaplan, Franziska Krieg, Matthias Ginterseder, Boris Spokoyny, Nathan D. Klein i in. "Coherent single-photon emission from colloidal lead halide perovskite quantum dots". Science 363, nr 6431 (21.02.2019): 1068–72. http://dx.doi.org/10.1126/science.aau7392.

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Chemically made colloidal semiconductor quantum dots have long been proposed as scalable and color-tunable single emitters in quantum optics, but they have typically suffered from prohibitively incoherent emission. We now demonstrate that individual colloidal lead halide perovskite quantum dots (PQDs) display highly efficient single-photon emission with optical coherence times as long as 80 picoseconds, an appreciable fraction of their 210-picosecond radiative lifetimes. These measurements suggest that PQDs should be explored as building blocks in sources of indistinguishable single photons and entangled photon pairs. Our results present a starting point for the rational design of lead halide perovskite–based quantum emitters that have fast emission, wide spectral tunability, and scalable production and that benefit from the hybrid integration with nanophotonic components that has been demonstrated for colloidal materials.

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18

Li, Hong, Ming Liu, Feng Yang, Siqi Zhang i Shengping Ruan. "Phase-Controlled Tunable Unconventional Photon Blockade in a Single-Atom-Cavity System". Micromachines 14, nr 11 (19.11.2023): 2123. http://dx.doi.org/10.3390/mi14112123.

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In the past few years, cavity optomechanical systems have received extensive attention and research and have achieved rapid development both theoretically and experimentally. The systems play an important role in many fields, such as quantum information processing, optomechanical storage, high-precision measurement, macroscopic entanglement, ultrasensitive sensors and so on. Photon manipulation has always been one of the key tasks in quantum information science and technology. Photon blockade is an important way to realize single photon sources and plays an important role in the field of quantum information. Due to the nonlinear coupling of the optical force system, the energy level is not harmonic, resulting in a photon blockade effect. In this paper, we study the phase-controlled tunable unconventional photon blockade in a single-atom-cavity system, and the second-order nonlinear crystals are attached to the cavity. The cavity interacts with squeezed light, which results in a nonlinear process. The system is driven by a complex pulsed laser, and the strength of the coherent driving contains the phase. We want to study the effect of squeezed light and phase. We use the second-order correlation function to numerically and theoretically analyze the photon blockade effect. We show that quantum interference of two-photon excitation between three different transition pathways can cause a photon blockade effect. When there is no squeezed light, the interference pathways becomes two, but there are still photon blockade effects. We explore the influence of the tunable phase and second-order nonlinear strength on the photon blockade effect. We calculate the correlation function and compare the numerical results with the analytical results under certain parameters and find that the agreement is better.

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19

Baek, H., M. Brotons-Gisbert, Z. X. Koong, A. Campbell, M. Rambach, K. Watanabe, T. Taniguchi i B. D. Gerardot. "Highly energy-tunable quantum light from moiré-trapped excitons". Science Advances 6, nr 37 (wrzesień 2020): eaba8526. http://dx.doi.org/10.1126/sciadv.aba8526.

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Photon antibunching, a hallmark of quantum light, has been observed in the correlations of light from isolated atomic and atomic-like solid-state systems. Two-dimensional semiconductor heterostructures offer a unique method to create a quantum light source: Moiré trapping potentials for excitons are predicted to create arrays of quantum emitters. While signatures of moiré-trapped excitons have been observed, their quantum nature has yet to be confirmed. Here, we report photon antibunching from single moiré-trapped interlayer excitons in a heterobilayer. Via magneto-optical spectroscopy, we demonstrate that the discrete anharmonic spectra arise from bound band-edge electron-hole pairs trapped in moiré potentials. Last, we exploit the large permanent dipole of interlayer excitons to achieve large direct current (DC) Stark tuning up to 40 meV. Our results confirm the quantum nature of moiré-confined excitons and open opportunities to investigate their inhomogeneity and interactions between the emitters or energetically tune single emitters into resonance with cavity modes.

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20

Zeuner, Katharina D., Matthias Paul, Thomas Lettner, Carl Reuterskiöld Hedlund, Lucas Schweickert, Stephan Steinhauer, Lily Yang i in. "A stable wavelength-tunable triggered source of single photons and cascaded photon pairs at the telecom C-band". Applied Physics Letters 112, nr 17 (23.04.2018): 173102. http://dx.doi.org/10.1063/1.5021483.

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21

Guo, Qinda, Maciej Dendzik, Antonija Grubišić-Čabo, Magnus H. Berntsen, Cong Li, Wanyu Chen, Bharti Matta i in. "A narrow bandwidth extreme ultra-violet light source for time- and angle-resolved photoemission spectroscopy". Structural Dynamics 9, nr 2 (marzec 2022): 024304. http://dx.doi.org/10.1063/4.0000149.

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Here, we present a high repetition rate, narrow bandwidth, extreme ultraviolet photon source for time- and angle-resolved photoemission spectroscopy. The narrow bandwidth pulses [Formula: see text] meV for photon energies [Formula: see text] eV are generated through high harmonic generation using ultra-violet drive pulses with relatively long pulse lengths (461 fs). The high harmonic generation setup employs an annular drive beam in tight focusing geometry at a repetition rate of 250 kHz. Photon energy selection is provided by a series of selectable multilayer bandpass mirrors and thin film filters, thus avoiding any time broadening introduced by single grating monochromators. A two stage optical-parametric amplifier provides < 100 fs tunable pump pulses from 0.65 μm to 9 μm. The narrow bandwidth performance of the light source is demonstrated through angle-resolved photoemission measurements on a series of quantum materials, including high-temperature superconductor Bi-2212, WSe2, and graphene.

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22

Versluis, Michel, Greger Juhlin, Öivind Andersson i Marcus Aldén. "Two-Dimensional Two-Phase Water Detection Using a Tunable Excimer Laser". Applied Spectroscopy 52, nr 3 (marzec 1998): 343–47. http://dx.doi.org/10.1366/0003702981943798.

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A method for simultaneous two-dimensional visualization of water in both gas and liquid phase is presented. This laser-based diagnostic technique uses a combination of two-photon laser-induced fluorescence (LIF) and spontaneous Raman scattering. A tunable KrF excimer laser, operating near 248 nm, was used as an excitation source. The technique was demonstrated on single water droplets and their surrounding gas-phase content. Prior to the visualization experiments, spectroscopic measurements were performed to find optimum filtering conditions.

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23

Hoang, Thang B., Johannes Beetz, Matthias Lermer, Leonardo Midolo, Martin Kamp, Sven Höfling i Andrea Fiore. "Widely tunable, efficient on-chip single photon sources at telecommunication wavelengths". Optics Express 20, nr 19 (6.09.2012): 21758. http://dx.doi.org/10.1364/oe.20.021758.

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Moczała-Dusanowska, Magdalena, Łukasz Dusanowski, Oliver Iff, Tobias Huber, Silke Kuhn, Tomasz Czyszanowski, Christian Schneider i Sven Höfling. "Strain-Tunable Single-Photon Source Based on a Circular Bragg Grating Cavity with Embedded Quantum Dots". ACS Photonics 7, nr 12 (25.11.2020): 3474–80. http://dx.doi.org/10.1021/acsphotonics.0c01465.

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25

Schuler, Bruno, Katherine A. Cochrane, Christoph Kastl, Edward S. Barnard, Edward Wong, Nicholas J. Borys, Adam M. Schwartzberg, D. Frank Ogletree, F. Javier García de Abajo i Alexander Weber-Bargioni. "Electrically driven photon emission from individual atomic defects in monolayer WS2". Science Advances 6, nr 38 (wrzesień 2020): eabb5988. http://dx.doi.org/10.1126/sciadv.abb5988.

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Quantum dot–like single-photon sources in transition metal dichalcogenides (TMDs) exhibit appealing quantum optical properties but lack a well-defined atomic structure and are subject to large spectral variability. Here, we demonstrate electrically stimulated photon emission from individual atomic defects in monolayer WS2 and directly correlate the emission with the local atomic and electronic structure. Radiative transitions are locally excited by sequential inelastic electron tunneling from a metallic tip into selected discrete defect states in the WS2 bandgap. Coupling to the optical far field is mediated by tip plasmons, which transduce the excess energy into a single photon. The applied tip-sample voltage determines the transition energy. Atomically resolved emission maps of individual point defects closely resemble electronic defect orbitals, the final states of the optical transitions. Inelastic charge carrier injection into localized defect states of two-dimensional materials provides a powerful platform for electrically driven, broadly tunable, atomic-scale single-photon sources.

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26

Salomone, Mattia, Michele Re Fiorentin, Giancarlo Cicero i Francesca Risplendi. "Point Defects in Two-Dimensional Indium Selenide as Tunable Single-Photon Sources". Journal of Physical Chemistry Letters 12, nr 45 (4.11.2021): 10947–52. http://dx.doi.org/10.1021/acs.jpclett.1c02912.

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Siverns, J. D., J. Hannegan i Q. Quraishi. "Demonstration of slow light in rubidium vapor using single photons from a trapped ion". Science Advances 5, nr 10 (październik 2019): eaav4651. http://dx.doi.org/10.1126/sciadv.aav4651.

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Practical implementation of quantum networks is likely to interface different types of quantum systems. Photonically linked hybrid systems, combining unique properties of each constituent system, have typically required sources with the same photon emission wavelength. Trapped ions and neutral atoms both have compelling properties as nodes and memories in a quantum network but have never been photonically linked because of vastly different operating wavelengths. Here, we demonstrate the first interaction between neutral atoms and photons emitted from a single trapped ion. We use slow light in 87Rb vapor to delay photons originating from a trapped 138Ba+ ion by up to 13.5 ± 0.5 ns, using quantum frequency conversion to overcome the frequency difference between the ion and neutral atoms. The delay is tunable and preserves the temporal profile of the photons. This result showcases a hybrid photonic interface usable as a synchronization tool—a critical component in any future large-scale quantum network.

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28

Palma, Tonia M., Maria V. Prati i Antonio Borghese. "Tunable single-photon ionization TOF mass spectrometry using laser-produced plasma as the table-top VUV light source". Journal of the American Society for Mass Spectrometry 20, nr 12 (grudzień 2009): 2192–98. http://dx.doi.org/10.1016/j.jasms.2009.08.006.

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Gu, Do-Heon, Cheolsoo Eo, Seung-A. Hwangbo, Sung-Chul Ha, Jin Hong Kim, Hyoyun Kim, Chae-Soon Lee i in. "BL-11C Micro-MX: a high-flux microfocus macromolecular-crystallography beamline for micrometre-sized protein crystals at Pohang Light Source II". Journal of Synchrotron Radiation 28, nr 4 (1.06.2021): 1210–15. http://dx.doi.org/10.1107/s1600577521004355.

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BL-11C, a new protein crystallography beamline, is an in-vacuum undulator-based microfocus beamline used for macromolecular crystallography at the Pohang Accelerator Laboratory and it was made available to users in June 2017. The beamline is energy tunable in the range 5.0–20 keV to support conventional single- and multi-wavelength anomalous-dispersion experiments against a wide range of heavy metals. At the standard working energy of 12.659 keV, the monochromated beam is focused to 4.1 µm (V) × 8.5 µm (H) full width at half-maximum at the sample position and the measured photon flux is 1.3 × 1012 photons s−1. The experimental station is equipped with a Pilatus3 6M detector, a micro-diffractometer (MD2S) incorporating a multi-axis goniometer, and a robotic sample exchanger (CATS) with a dewar capacity of 90 samples. This beamline is suitable for structural determination of weakly diffracting crystalline substances, such as biomaterials, including protein, nucleic acids and their complexes. In addition, serial crystallography experiments for determining crystal structures at room temperature are possible. Herein, the current beamline characteristics, technical information for users and some recent scientific highlights are described.

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Volz, Pierre, Robert Brodwolf, Christian Zoschke, Rainer Haag, Monika Schäfer-Korting i Ulrike Alexiev. "White-Light Supercontinuum Laser-Based Multiple Wavelength Excitation for TCSPC-FLIM of Cutaneous Nanocarrier Uptake". Zeitschrift für Physikalische Chemie 232, nr 5-6 (24.05.2018): 671–88. http://dx.doi.org/10.1515/zpch-2017-1050.

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AbstractWe report here on a custom-built time-correlated single photon-counting (TCSPC)-based fluorescence lifetime imaging microscopy (FLIM) setup with a continuously tunable white-light supercontinuum laser combined with acousto-optical tunable filters (AOTF) as an excitation source for simultaneous excitation of multiple spectrally separated fluorophores. We characterized the wavelength dependence of the white-light supercontinuum laser pulse properties and demonstrated the performance of the FLIM setup, aiming to show the experimental setup in depth together with a biomedical application. We herein summarize the physical-technical parameters as well as our approach to map the skin uptake of nanocarriers using FLIM with a resolution compared to spectroscopy. As an example, we focus on the penetration study of indocarbocyanine-labeled dendritic core-multishell nanocarriers (CMS-ICC) into reconstructed human epidermis. Unique fluorescence lifetime signatures of indocarbocyanine-labeled nanocarriers indicate nanocarrier-tissue interactions within reconstructed human epidermis, bringing FLIM close to spectroscopic analysis.

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Srocka, N., P. Mrowiński, J. Große, M. Schmidt, S. Rodt i S. Reitzenstein. "Deterministically fabricated strain-tunable quantum dot single-photon sources emitting in the telecom O-band". Applied Physics Letters 117, nr 22 (30.11.2020): 224001. http://dx.doi.org/10.1063/5.0030991.

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Kalachev, A. A. "Writing and reading quantum states of light with tunable cavity: Application to single-photon sources". Optics and Spectroscopy 109, nr 1 (lipiec 2010): 32–39. http://dx.doi.org/10.1134/s0030400x10070076.

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Graber, T., S. Anderson, H. Brewer, Y. S. Chen, H. S. Cho, N. Dashdorj, R. W. Henning i in. "BioCARS: a synchrotron resource for time-resolved X-ray science". Journal of Synchrotron Radiation 18, nr 4 (12.05.2011): 658–70. http://dx.doi.org/10.1107/s0909049511009423.

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BioCARS, a NIH-supported national user facility for macromolecular time-resolved X-ray crystallography at the Advanced Photon Source (APS), has recently completed commissioning of an upgraded undulator-based beamline optimized for single-shot laser-pump X-ray-probe measurements with time resolution as short as 100 ps. The source consists of two in-line undulators with periods of 23 and 27 mm that together provide high-flux pink-beam capability at 12 keV as well as first-harmonic coverage from 6.8 to 19 keV. A high-heat-load chopper reduces the average power load on downstream components, thereby preserving the surface figure of a Kirkpatrick–Baez mirror system capable of focusing the X-ray beam to a spot size of 90 µm horizontal by 20 µm vertical. A high-speed chopper isolates single X-ray pulses at 1 kHz in both hybrid and 24-bunch modes of the APS storage ring. In hybrid mode each isolated X-ray pulse delivers up to ∼4 × 1010photons to the sample, thereby achieving a time-averaged flux approaching that of fourth-generation X-FEL sources. A new high-power picosecond laser system delivers pulses tunable over the wavelength range 450–2000 nm. These pulses are synchronized to the storage-ring RF clock with long-term stability better than 10 ps RMS. Monochromatic experimental capability with Biosafety Level 3 certification has been retained.

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Davidson, O., R. Finkelstein, E. Poem i O. Firstenberg. "Bright multiplexed source of indistinguishable single photons with tunable GHz-bandwidth at room temperature". New Journal of Physics 23, nr 7 (1.07.2021): 073050. http://dx.doi.org/10.1088/1367-2630/ac14ab.

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Schenkel, Thomas, Walid Redjem, Arun Persaud, Wei Liu, Peter A. Seidl, Ariel J. Amsellem, Boubacar Kanté i Qing Ji. "Exploration of Defect Dynamics and Color Center Qubit Synthesis with Pulsed Ion Beams". Quantum Beam Science 6, nr 1 (16.03.2022): 13. http://dx.doi.org/10.3390/qubs6010013.

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Short-pulse ion beams have been developed in recent years and now enable applications in materials science. A tunable flux of selected ions delivered in pulses of a few nanoseconds can affect the balance of defect formation and dynamic annealing in materials. We report results from color center formation in silicon with pulses of 900 keV protons. G-centers in silicon are near-infrared photon emitters with emerging applications as single-photon sources and for spin-photon qubit integration. G-centers consist of a pair of substitutional carbon atoms and one silicon interstitial atom and are often formed by carbon ion implantation and thermal annealing. Here, we report on G-center formation with proton pulses in silicon samples that already contained carbon, without carbon ion implantation or thermal annealing. The number of G-centers formed per proton increased when we increased the pulse intensity from 6.9 × 109 to 7.9 × 1010 protons/cm2/pulse, demonstrating a flux effect on G-center formation efficiency. We observe a G-center ensemble linewidth of 0.1 nm (full width half maximum), narrower than previously reported. Pulsed ion beams can extend the parameter range available for fundamental studies of radiation-induced defects and the formation of color centers for spin-photon qubit applications.

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Dolan, P. R., S. Adekanye, A. A. P. Trichet, S. Johnson, L. C. Flatten, Y. C. Chen, L. Weng i in. "Robust, tunable, and high purity triggered single photon source at room temperature using a nitrogen-vacancy defect in diamond in an open microcavity". Optics Express 26, nr 6 (8.03.2018): 7056. http://dx.doi.org/10.1364/oe.26.007056.

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37

Puchert, Robin P., Felix J. Hofmann, Hermann S. Angerer, Jan Vogelsang, Sebastian Bange i John M. Lupton. "Linearly Polarized Electroluminescence from MoS 2 Monolayers Deposited on Metal Nanoparticles: Toward Tunable Room‐Temperature Single‐Photon Sources". Small 17, nr 5 (15.01.2021): 2006425. http://dx.doi.org/10.1002/smll.202006425.

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Tao, Lue, Wenqi Wei, Yang Li, Weiwen Ou, Ting Wang, Chengli Wang, Jiaxiang Zhang, Jianjun Zhang, Fuwan Gan i Xin Ou. "On-Chip Integration of Energy-Tunable Quantum Dot Based Single-Photon Sources via Strain Tuning of GaAs Waveguides". ACS Photonics 7, nr 10 (3.09.2020): 2723–30. http://dx.doi.org/10.1021/acsphotonics.0c00748.

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Zhou, Zhi-Yuan, Yun-Kun Jiang, Dong-Sheng Ding i Bao-Sen Shi. "An ultra-broadband continuously-tunable polarization-entangled photon-pair source covering the C+L telecom bands based on a single type-II PPKTP crystal". Journal of Modern Optics 60, nr 9 (maj 2013): 720–25. http://dx.doi.org/10.1080/09500340.2013.807363.

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Kalinina, Sviatlana, Alexander Jelzow, Tobias Plötzing i Angelika Rück. "Fast repetition rate fs pulsed lasers for advanced PLIM microscopy". Journal of Innovative Optical Health Sciences 12, nr 05 (wrzesień 2019): 1940004. http://dx.doi.org/10.1142/s1793545819400042.

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Simultaneous metabolic and oxygen imaging is promising to follow up therapy response, disease development and to determine prognostic factors. FLIM of metabolic coenzymes is now widely accepted to be the most reliable method to determine cellular bioenergetics. Also, oxygen consumption has to be taken into account to understand treatment responses. The phosphorescence lifetime of oxygen sensors is able to indicate local oxygen changes. For phosphorescence lifetime imaging (PLIM) dyes based on ruthenium (II) coordination complexes are useful, in detail TLD1433 which possesses a variety of different triplet states, enables complex photochemistry and redox reactions. PLIM is usually reached by two photon excitation of the drug with a femtosecond (fs) pulsed Ti:Sapphire laser working at 80[Formula: see text]MHz repetition rate and (time-correlated single photon counting) (TCSPC) detection electronics. The interesting question was whether it is possible to follow up PLIM using faster repetition rates. Faster repetition rates could be advantageous for the induction of specific photochemical reactions because of similar light doses used normally in standard CW light treatments. For this, a default 2[Formula: see text]-FLIM–PLIM system was expanded by adding a second fs pulsed laser (“helixx”) which provides 50[Formula: see text]fs pulses at a repetition rate of 250[Formula: see text]MHz, more than 2.3[Formula: see text]W average power and tunable from 720[Formula: see text]nm to 920[Formula: see text]nm. The laser beam was coupled into the AOM instead of the default 80[Formula: see text]MHz laser. We demonstrated successful applications of the 250[Formula: see text]MHz laser for PLIM which correlates well with measurements done by excitation with the conventional 80[Formula: see text]MHz laser source.

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41

Vegso, Karol, Ashin Shaji, Michaela Sojková, Lenka Príbusová Slušná, Tatiana Vojteková, Jana Hrdá, Yuriy Halahovets i in. "A wide-angle X-ray scattering laboratory setup for tracking phase changes of thin films in a chemical vapor deposition chamber". Review of Scientific Instruments 93, nr 11 (1.11.2022): 113909. http://dx.doi.org/10.1063/5.0104673.

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The few-layer transition metal dichalcogenides (TMD) are an attractive class of materials due to their unique and tunable electronic, optical, and chemical properties, controlled by the layer number, crystal orientation, grain size, and morphology. One of the most commonly used methods for synthesizing the few-layer TMD materials is the chemical vapor deposition (CVD) technique. Therefore, it is crucial to develop in situ inspection techniques to observe the growth of the few-layer TMD materials directly in the CVD chamber environment. We demonstrate such an in situ observation on the growth of the vertically aligned few-layer MoS2 in a one-zone CVD chamber using a laboratory table-top grazing-incidence wide-angle X-ray scattering (GIWAXS) setup. The advantages of using a microfocus X-ray source with focusing Montel optics and a single-photon counting 2D X-ray detector are discussed. Due to the position-sensitive 2D X-ray detector, the orientation of MoS2 layers can be easily distinguished. The performance of the GIWAXS setup is further improved by suppressing the background scattering using a guarding slit, an appropriately placed beamstop, and He gas in the CVD reactor. The layer growth can be monitored by tracking the width of the MoS2 diffraction peak in real time. The temporal evolution of the crystallization kinetics can be satisfactorily described by the Avrami model, employing the normalized diffraction peak area. In this way, the activation energy of the particular chemical reaction occurring in the CVD chamber can be determined.

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Zhang, Xinyu, Xuewen Zhang, Hanwei Hu, Vanessa Li Zhang, Weidong Xiao, Guangchao Shi, Jingyuan Qiao, Nan Huang, Ting Yu i Jingzhi Shang. "Light-emitting devices based on atomically thin MoSe₂". Journal of Semiconductors 45, nr 4 (1.04.2024): 041701. http://dx.doi.org/10.1088/1674-4926/45/4/041701.

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Abstract Atomically thin MoSe2 layers, as a core member of the transition metal dichalcogenides (TMDs) family, benefit from their appealing properties, including tunable band gaps, high exciton binding energies, and giant oscillator strengths, thus providing an intriguing platform for optoelectronic applications of light-emitting diodes (LEDs), field-effect transistors (FETs), single-photon emitters (SPEs), and coherent light sources (CLSs). Moreover, these MoSe2 layers can realize strong excitonic emission in the near-infrared wavelengths, which can be combined with the silicon-based integration technologies and further encourage the development of the new generation technologies of on-chip optical interconnection, quantum computing, and quantum information processing. Herein, we overview the state-of-the-art applications of light-emitting devices based on two-dimensional MoSe2 layers. Firstly, we introduce recent developments in excitonic emission features from atomically thin MoSe2 and their dependences on typical physical fields. Next, we focus on the exciton-polaritons and plasmon-exciton polaritons in MoSe2 coupled to the diverse forms of optical microcavities. Then, we highlight the promising applications of LEDs, SPEs, and CLSs based on MoSe2 and their heterostructures. Finally, we summarize the challenges and opportunities for high-quality emission of MoSe2 and high-performance light-emitting devices.

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Naccache, Rafik. "(Invited) Carbon Dots – Unlocking Optical Properties for Applications in Imaging, Sensing and Energy". ECS Meeting Abstracts MA2022-02, nr 36 (9.10.2022): 1294. http://dx.doi.org/10.1149/ma2022-02361294mtgabs.

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In recent years, nanomaterials (defined as materials < 100 nm in a single dimension) have garnered a significant interest for the development of novel applications in the physical and life sciences. One such class of nanomaterials are carbon dots, a relatively new member in the carbon allotrope family, which possesses versatile optical properties rendering it attractive for sensing, catalysis, bioimaging and drug delivery applications, to name a few. Their ultra-compact size, low cytotoxicity, resistance to photo-bleaching/blinking and tunable photoluminescence, combined with simple, environmentally-friendly and low-cost synthesis, makes them ideal candidates for study. We synthesize carbon dots via bottom-up synthesis methods, with simple organic precursors (e.g. citric acid) as the carbon source. We passivate the surface of our carbon dots to achieve high fluorescence quantum yields. Moreover, our work focuses on trying to elucidate the fluorescence mechanisms in carbon dots, which remain a subject of debate. Finally, we exploit their optical properties in order to design multifunctional materials as chiral, pH or temperature sensors, as well as heterogeneous catalysts for green energy applications.

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Hidding, Bernhard, Andrew Beaton, Lewis Boulton, Sebastién Corde, Andreas Doepp, Fahim Ahmad Habib, Thomas Heinemann i in. "Fundamentals and Applications of Hybrid LWFA-PWFA". Applied Sciences 9, nr 13 (28.06.2019): 2626. http://dx.doi.org/10.3390/app9132626.

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Fundamental similarities and differences between laser-driven plasma wakefield acceleration (LWFA) and particle-driven plasma wakefield acceleration (PWFA) are discussed. The complementary features enable the conception and development of novel hybrid plasma accelerators, which allow previously not accessible compact solutions for high quality electron bunch generation and arising applications. Very high energy gains can be realized by electron beam drivers even in single stages because PWFA is practically dephasing-free and not diffraction-limited. These electron driver beams for PWFA in turn can be produced in compact LWFA stages. In various hybrid approaches, these PWFA systems can be spiked with ionizing laser pulses to realize tunable and high-quality electron sources via optical density downramp injection (also known as plasma torch) or plasma photocathodes (also known as Trojan Horse) and via wakefield-induced injection (also known as WII). These hybrids can act as beam energy, brightness and quality transformers, and partially have built-in stabilizing features. They thus offer compact pathways towards beams with unprecedented emittance and brightness, which may have transformative impact for light sources and photon science applications. Furthermore, they allow the study of PWFA-specific challenges in compact setups in addition to large linac-based facilities, such as fundamental beam–plasma interaction physics, to develop novel diagnostics, and to develop contributions such as ultralow emittance test beams or other building blocks and schemes which support future plasma-based collider concepts.

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45

Han, Seung Woo, Chang Taek Lee i Moo Whan Shin. "Photothermal Lasing-Assisted Synthesis of 2D Metal-Organic Framework and Its Application to Memory Device". ECS Meeting Abstracts MA2022-02, nr 36 (9.10.2022): 1332. http://dx.doi.org/10.1149/ma2022-02361332mtgabs.

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Resistive random access memory (RRAM) has attracted as candidate in the next generation of non-volatile memory device due to its low power consumption, fast write/erase speed, and high CMOS compatibility 1–3. At present, among various materials, metal-organic frameworks (MOFs) are significantly attracting attention as promising materials for data storage applications due to their advantages of highly ordered pores, large surface area, tunable structure, and subsequent controllable function 4–6. However, it is difficult to apply MOF to RRAM, because synthesis time is generally long and additional step is needed to form the MOF into a thin film. Therefore, there is a need for a new method for synthesizing MOF in the form of a thin film simply and fast. In this work, we simply and fast synthesized a 2D MOF nanosheets, Cu(BDC), in the form of thin film using laser process. The dissolved ligand (terephthalic acid) in the N,N-dimethylformamide (DMF) is dropped on the Cu thin film and then irradiate the laser beam on the active spot. Photon energy of laser is absorbed in the Cu metal film, which generate the photothermal effect. This photothermal effect oxides the Cu atom into Cu ion and the oxidized Cu ions are used as metal source of Cu(BDC). This process simply and quickly transforms the Cu thin film into a Cu(BDC) thin film that can act an active layer of RRAM. The suggested method not only is finished in minutes, but also does not needed additional process step of transferring the MOF onto the thin film. The fabricated 2D MOF based-RRAM shows a typical bipolar switching behavior. Our device also exhibits a high on/off ratio (>103), low set/reset voltages (1 V > in SET and -0.5 V > in RESET), and long retention (1×104 s). Therefore, our research suggests a simple and rapid synthesis method of MOFs in the form of a thin film by using laser process and demonstrates applicability 2D MOF fabricated by laser process for the non-volatile memory device. Figure Caption Figure (a) Schematics of synthesis of metal-organic frameworks (MOFs) using laser process. (b) Scanning electron microscopy (SEM) image of Cu(BDC) thin film surface. (c) Transmission electron microscopy (TEM) image of single Cu(BDC) nanosheet. (d) Current-voltage (I-V) curve for 2D MOF based-RRAM device. (e) Retention tests of 2D MOF based-RRAM device. Figure 1

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46

Ou-Yang, Yang, Zhao-Feng Feng, Lan Zhou i Yu-Bo Sheng. "Protecting single-photon entanglement with imperfect single-photon source". Quantum Information Processing 14, nr 2 (26.11.2014): 635–51. http://dx.doi.org/10.1007/s11128-014-0886-8.

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Hadfield, Robert H., Martin J. Stevens, Steven S. Gruber, Aaron J. Miller, Robert E. Schwall, Richard P. Mirin i Sae Woo Nam. "Single photon source characterization with a superconducting single photon detector". Optics Express 13, nr 26 (2005): 10846. http://dx.doi.org/10.1364/opex.13.010846.

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Volz, Jürgen, Xinxin Hu, Gabriele Maron, Luke Masters, Lucas Pache i Arno Rauschenbeutel. "Single atom photon pair source". EPJ Web of Conferences 266 (2022): 08016. http://dx.doi.org/10.1051/epjconf/202226608016.

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Sources of entangled photon pairs are a crucial ingredient for many applications in quantum information and communication. Of particular interest are narrow-band sources with bandwidths that are compatible with solid state systems such as atomic media for storage and manipulation of the photons. Here, we experimentally realize a source of energy-time entangled photon pairs where the photons pairs are generated by scattering light from a single two-level atom and separated from the coherently scattered light via a narrow-band filter. We verify the performance of our pair-source by measuring the second order correlation function of the atomic fluorescence and we observe that one can continuously tune the photon statistics of the atomic fluorescence from perfect photon anti-bunching to strong photon bunching expected for a photon pair source. Our experiment demonstrates a novel way to realize a photon pair source for photons with spectral bandwidths and resonance frequencies that are inherently compatible with atomic media.

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Uppu, Ravitej, Freja T. Pedersen, Ying Wang, Cecilie T. Olesen, Camille Papon, Xiaoyan Zhou, Leonardo Midolo i in. "Scalable integrated single-photon source". Science Advances 6, nr 50 (grudzień 2020): eabc8268. http://dx.doi.org/10.1126/sciadv.abc8268.

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Photonic qubits are key enablers for quantum information processing deployable across a distributed quantum network. An on-demand and truly scalable source of indistinguishable single photons is the essential component enabling high-fidelity photonic quantum operations. A main challenge is to overcome noise and decoherence processes to reach the steep benchmarks on generation efficiency and photon indistinguishability required for scaling up the source. We report on the realization of a deterministic single-photon source featuring near-unity indistinguishability using a quantum dot in an “on-chip” planar nanophotonic waveguide circuit. The device produces long strings of >100 single photons without any observable decrease in the mutual indistinguishability between photons. A total generation rate of 122 million photons per second is achieved, corresponding to an on-chip source efficiency of 84%. These specifications of the single-photon source are benchmarked for boson sampling and found to enable scaling into the regime of quantum advantage.

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Nguyen, H. S., G. Sallen, C. Voisin, Ph Roussignol, C. Diederichs i G. Cassabois. "Ultra-coherent single photon source". Applied Physics Letters 99, nr 26 (26.12.2011): 261904. http://dx.doi.org/10.1063/1.3672034.

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