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公开(公告)号：US20170352538A1
公开(公告)日：2017-12-07
申请号：US15613396
申请日：2017-06-05
申请人： Jeehwan Kim , Dirk Robert ENGLUND , Mark A. HOLLIS , Travis WADE , Michael GEIS , Richard MOLNAR
发明人： Jeehwan Kim , Dirk Robert ENGLUND , Mark A. HOLLIS , Travis WADE , Michael GEIS , Richard MOLNAR
IPC分类号： H01L21/02 , H01L21/306 , H01L29/04 , H01L21/683 , H01L21/3213 , H01L29/16
CPC分类号： H01L21/02527 , H01L21/02376 , H01L21/02444 , H01L21/0245 , H01L21/02499 , H01L21/02598 , H01L21/0262 , H01L21/02639 , H01L21/02645 , H01L21/02647 , H01L21/30604 , H01L21/32133 , H01L21/6835 , H01L29/04 , H01L29/1602 , H01L29/1606 , H01L29/66015 , H01L2221/68363 , H01L2221/68381 , H01L2221/68386
摘要： A buffer layer is employed to fabricate diamond membranes and allow reuse of diamond substrates. In this approach, diamond membranes are fabricated on the buffer layer, which in turn is disposed on a diamond substrate that is lattice-matched to the diamond membrane. The weak bonding between the buffer layer and the diamond substrate allows ready release of the fabricated diamond membrane. The released diamond membrane is transferred to another substrate to fabricate diamond devices, while the diamond substrate is reused for another fabrication.
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公开(公告)号：US20220197225A1
公开(公告)日：2022-06-23
申请号：US17504238
申请日：2021-10-18
摘要： An ensemble of spin defect centers or other atom-like quantum systems in a solid-state host can be used as a compact alternative for an atomic clock thanks to an architecture that overcomes magnetic and temperature-induced systematics. A polariton-stabilized solid-state spin clock hybridizes a microwave resonator with a magnetic-field-insensitive spin transition within the ground state of a spin defect center (e.g., a nitrogen vacancy center in diamond). Detailed numerical and analytical modeling of this polariton-stabilized solid-state spin clock indicates a potential fractional frequency instability below 10-13 over a 1-second measurement time, assuming present-day experimental parameters. This stability is a significant improvement over the state-of-the-art in miniaturized atomic vapor clocks.
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公开(公告)号：US20210296558A1
公开(公告)日：2021-09-23
申请号：US17151763
申请日：2021-01-19
申请人： Dirk Robert ENGLUND , Matthew Edwin TRUSHEIM , Matt Eichenfield , Tomas Neuman , Prineha Narang
发明人： Dirk Robert ENGLUND , Matthew Edwin TRUSHEIM , Matt Eichenfield , Tomas Neuman , Prineha Narang
摘要： A hybrid quantum system performs high-fidelity quantum state transduction between a superconducting (SC) microwave qubit and the ground state spin system of a solid-state artificial atom. This transduction is mediated via an acoustic bus connected by piezoelectric transducers to the SC microwave qubit. For SC circuit qubits and diamond silicon vacancy centers in an optimized phononic cavity, the system can achieve quantum state transduction with fidelity exceeding 99% at a MHz-scale bandwidth. By combining the complementary strengths of SC circuit quantum computing and artificial atoms, the hybrid quantum system provides high-fidelity qubit gates with long-lived quantum memory, high-fidelity measurement, large qubit number, reconfigurable qubit connectivity, and high-fidelity state and gate teleportation through optical quantum networks.
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4.发明申请公开(公告)号：US20200295075A1
公开(公告)日：2020-09-17
申请号：US16684917
申请日：2019-11-15
IPC分类号： H01L27/146 , H04N5/33 , H01L29/16 , H01Q21/06
摘要： A filter-based color imaging array that resolves N different colors detects only 1/Nth of the incoming light. In the thermal infrared wavelength range, filtering loss is exacerbated by the lower sensor detectivity at infrared wavelengths than at visible wavelengths. To avoid loss due to filtering, most spectral imagers use bulky optics, such as diffraction gratings or Fourier transform interferometers, to resolve different colors. Fortunately, it is possible to avoid filtering loss without bulky optics: detect light with interleaved arrays of sub-wavelength-spaced antennas tuned to different wavelengths. An optically sensitive element inside each antenna absorbs light at the antenna's resonant wavelength. Metallic slot antennas offer high efficiency, intrinsic unidirectionality, and lower cross-talk than dipole or bowtie antennas. Graphene serves at the optically active material inside each antenna because its 2D nature makes it easily adaptable to this imager architecture.
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公开(公告)号：US20220337333A1
公开(公告)日：2022-10-20
申请号：US17673268
申请日：2022-02-16
摘要： Deep neural networks (DNNs) have become very popular in many areas, especially classification and prediction. However, as the number of neurons in the DNN increases to solve more complex problems, the DNN becomes limited by the latency and power consumption of existing hardware. A scalable, ultra-low latency photonic tensor processor can compute DNN layer outputs in a single shot. The processor includes free-space optics that perform passive optical copying and distribution of an input vector and integrated optoelectronics that implement passive weighting and the nonlinearity. An example of this processor classified the MNIST handwritten digit dataset (with an accuracy of 94%, which is close to the 96% ground truth accuracy). The processor can be scaled to perform near-exascale computing before hitting its fundamental throughput limit, which is set by the maximum optical bandwidth before significant loss of classification accuracy (determined experimentally).
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公开(公告)号：US20220269972A1
公开(公告)日：2022-08-25
申请号：US17556033
申请日：2021-12-20
摘要： Programmable photonic circuits of reconfigurable interferometers can be used to implement arbitrary operations on optical modes, providing a flexible platform for accelerating tasks in quantum simulation, signal processing, and artificial intelligence. A major obstacle to scaling up these systems is static fabrication error, where small component errors within each device accrue to produce significant errors within the circuit computation. Mitigating errors usually involves numerical optimization dependent on real-time feedback from the circuit, which can greatly limit the scalability of the hardware. Here, we present a resource-efficient, deterministic approach to correcting circuit errors by locally correcting hardware errors within individual optical gates. We apply our approach to simulations of large-scale optical neural networks and infinite impulse response filters implemented in programmable photonics, finding that they remain resilient to component error well beyond modern day process tolerances. Our error correction process can be used to scale up programmable photonics within current fabrication processes.
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公开(公告)号：US20210057135A1
公开(公告)日：2021-02-25
申请号：US16907741
申请日：2020-06-22
摘要： Using the Meissner effect in superconductors, demonstrated here is the capability to create an arbitrarily high magnetic flux density (also sometimes referred to as “flux squeezing”). This technique has immediate applications for numerous technologies. For example, it allows the generation of very large magnetic fields (e.g., exceeding 1 Tesla) for nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI), the generation of controlled magnetic fields for advanced superconducting quantum computing devices, and/or the like. The magnetic field concentration/increased flux density approaches can be applied to both static magnetic fields (i.e., direct current (DC) magnetic fields) and time-varying magnetic fields (i.e., alternating current (AC) magnetic fields) up to microwave frequencies.
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公开(公告)号：US20200150511A1
公开(公告)日：2020-05-14
申请号：US16680908
申请日：2019-11-12
申请人： Jacques Johannes Carolan , Uttara Chakraborty , Nicholas C. HARRIS , Mihir PANT , Dirk Robert ENGLUND
发明人： Jacques Johannes Carolan , Uttara Chakraborty , Nicholas C. HARRIS , Mihir PANT , Dirk Robert ENGLUND
IPC分类号： G02F1/35 , H01S3/083 , H01S3/094 , H01S3/08 , H01S3/13 , H01S3/067 , H01S3/23 , G02F1/355 , G02F1/365
摘要： Typically, quantum systems are very sensitive to environmental fluctuations, and diagnosing errors via measurements causes unavoidable perturbations. Here, an in situ frequency-locking technique monitors and corrects frequency variations in single-photon sources based on resonators. By using the classical laser fields used for photon generation as probes to diagnose variations in the resonator frequency, the system applies feedback control to correct photon frequency errors in parallel to the optical quantum computation without disturbing the physical qubit. Our technique can be implemented on a silicon photonic device and with sub 1 pm frequency stabilization in the presence of applied environmental noise, corresponding to a fractional frequency drift of
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公开(公告)号：US20170212405A1
公开(公告)日：2017-07-27
申请号：US15172747
申请日：2016-06-03
申请人： Mihir PANT , Dirk Robert ENGLUND , Mikkel HEUCK
发明人： Mihir PANT , Dirk Robert ENGLUND , Mikkel HEUCK
CPC分类号： G02F1/31 , G02F1/3501 , G02F1/3536 , G02F1/39 , G02F2001/3503 , H04B10/70
摘要： A photon source to deliver single photons includes a storage ring resonator to receive pump photons and generate a signal photon and an idler photon. An idler resonator is coupled to the storage resonator to couple the idler photon out of the storage resonator and into a detector. Detection of the idler photon stops the pump photons from entering the storage resonator. A signal resonator is coupled to the storage resonator to couple out the signal photon remaining in the storage resonator and delivers the signal photon to applications. The photon source can be fabricated into a photonic integrated circuit to achieve high compactness, reliability, and controllability.
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公开(公告)号：US20230274156A1
公开(公告)日：2023-08-31
申请号：US18247129
申请日：2021-07-29
发明人： Ryan HAMERLY , Dirk Robert ENGLUND
摘要： NetCast is an optical neural network architecture that circumvents constraints on deep neural network (DNN) inference at the edge. Many DNNs have weight matrices that are too large to run on edge processors, leading to limitations on DNN inference at the edge or bandwidth bottlenecks between the edge and server that hosts the DNN. With NetCast, a weight server stores the DNN weight matrix in local memory, modulates the weights onto different spectral channels of an optical carrier, and distributes the weights to one or more clients via optical links. Each client stores the activations, or layer inputs, for the DNN and computes the matrix-vector product of those activations with the weights from the weight server in the optical domain. This multiplication can be performed coherently by interfering the spectrally multiplexed weights with spectrally multiplexed activations or incoherently by modulating the weight signal from the weight server with the activations.
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