We report a nanobeam photonic crystal cavity coupled to charge tunable quantum dot for efficient spin-photon interface. We achieved coupling efficiency of ~32% and deterministically tuned the cavity resonance over ~9 ...
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We present an experimental technique for customizing the spatio-spectral speckled intensity statistics of ultra-short optical pulses at the output of a a disordered multimode fiber by controlling the spatial profile o...
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ISBN:
(纸本)9798350369311
We present an experimental technique for customizing the spatio-spectral speckled intensity statistics of ultra-short optical pulses at the output of a a disordered multimode fiber by controlling the spatial profile of the input light.
Software-defined networking(SDN)is a new paradigm that promises to change by breaking vertical integration,decoupling network control logic from the underlying routers and switches,promoting(logical)network control ce...
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Software-defined networking(SDN)is a new paradigm that promises to change by breaking vertical integration,decoupling network control logic from the underlying routers and switches,promoting(logical)network control centralization,and introducing network ***,the controller is similarly vulnerable to a“single point of failure”,an attacker can execute a distributed denial of service(DDoS)attack that invalidates the controller and compromises the network security in *** address the problem of DDoS traffic detection in SDN,a novel detection approach based on information entropy and deep neural network(DNN)is *** approach contains a DNN-based DDoS traffic detection module and an information-based entropy initial inspection *** initial inspection module detects the suspicious network traffic by computing the information entropy value of the data packet’s source and destination Internet Protocol(IP)addresses,and then identifies it using the DDoS detection module based on *** assaults were found when suspected irregular traffic was *** reveal that the algorithm recognizes DDoS activity at a rate of more than 99%,with a much better accuracy *** false alarm rate(FAR)is much lower than that of the information entropy-based detection ***,the proposed framework can shorten the detection time and improve the resource utilization efficiency.
This research aims to construct a two-dimensional image to represent an underwater geometry map with a Side Scan Sonar (SSS) mounted on a Hybrid Autonomous Underwater Glider (HAUG). Building the underwater map has two...
This research aims to construct a two-dimensional image to represent an underwater geometry map with a Side Scan Sonar (SSS) mounted on a Hybrid Autonomous Underwater Glider (HAUG). Building the underwater map has two stages of the process. The first stage is preprocessing which includes Time-varying gains (TVG), slant range correction, and ground range correction. The second is HAUG navigation, the movement of HAUG orientation to the angle and distance of SSS readings and plotting the geometry of the grid map. With these two stages, a two-dimensional grid map will be formed. Meanwhile, the 3D plot utilizes slant range and ground range correction to obtain the surface height of the bottom of the pool. From the experiments conducted to conduct mapping in the pool, two-dimensional and three-dimensional visual forms of the pool floor and pool walls were produced. The results of the estimated measurement of the width of the pool obtained 14.05 meters and the height of the pool 3.199 meters with an SSS beam angle of 58 degrees.
Light detection and ranging (LiDAR) is widely thought to be the next big market for silicon photonics after data and telecommunications. In this talk, we will present some recent progress silicon photonics made in min...
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A Brillouin laser with electrically-tunable phase matching is demonstrated using high-Q SiN microresonators. The device lases anywhere on demand in the optical C-band. electrical tuning also enables controlled access ...
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The ability to spatially and temporally map nanoscale environments in situ over extended timescales would be transformative for biology, biomedicine, and bioengineering. All nanometer objects, from nanoparticles down ...
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In this contribution, we improve of the performance of the Rectified Linear Unit Memristor Like Activation Function with the implication to help training process of CNN without a lot of epochs by computing the best va...
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Optically detected magnetic resonance1,2 (ODMR) is an efficient mechanism to readout the spin of solid-state color centers at room temperature, thus enabling spin-based quantum sensors of magnetic field,3–6 electric ...
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Optically detected magnetic resonance1,2 (ODMR) is an efficient mechanism to readout the spin of solid-state color centers at room temperature, thus enabling spin-based quantum sensors of magnetic field,3–6 electric field,7 and temperature6,8,9 with high sensitivity and broad commercial applicability. The mechanism of room temperature ODMR is based on spin-dependent relaxation between the optically excited states to the ground states, and thus it is an intrinsic property of a defect center. While the diamond nitrogen-vacancy (NV) center is the most prominent example,10,11 room temperature ODMR has also been discovered in silicon vacancy centers12 and divacancy centers13 in SiC, and recently in boron vacancy center ensembles14,15 and unidentified single defects16,17in hexagonal boron nitride (hBN). Of these material systems, diamond NV centers are the most technologically important owing to their large (20–30%) ODMR contrast, long spin coherence, high quantum efficiency, and high brightness.18 Unfortunately, diamond as a substrate is far from being technologically mature. For example, diamond is unavailable with high crystalline quality in large-scale wafers and lacks hetero-epitaxial integration with semiconductors for integrated sensor technologies. Likewise, boron vacancy centers in hBN have large contrast (up to 20%),15,19,20 however, they are available only as small flakes, have low quantum efficiency,21,22 and lack a visible zero-phonon line at room temperature.23 Silicon carbide is a technologically mature substrate with recent advances in scalable monolithic integration of color-center-based quantum light sources.24 However, the room temperature ODMR of its defects discovered so far have low contrast (under 1%).12,13,25,26 In this work we demonstrate bright single defects in GaN that display large ODMR contrast (up to ∼30%). Because GaN is a mature semiconductor with well-developed electronic technologies already developed, this defect platform is promising f
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