Neil Sinclair
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View article: Spectral-temporal processing using integrated recursive electro-optic circuit
Spectral-temporal processing using integrated recursive electro-optic circuit Open
Advances in integrated photonics have enabled unprecedented level of control of light, powering a wide range of photonic technologies from communications and computing to precision metrology and quantum information. However, the convention…
View article: A sub-volt near-IR lithium tantalate electro-optic modulator
A sub-volt near-IR lithium tantalate electro-optic modulator Open
We demonstrate a low-loss integrated electro-optic Mach–Zehnder modulator in thin-film lithium tantalate at 737 nm, featuring a low half-wave voltage-length product of 0.65 V cm, an extinction ratio of 30 dB, low optical loss of 5.3 dB, as…
View article: Integrated lithium niobate photonic computing circuit based on efficient and high-speed electro-optic conversion
Integrated lithium niobate photonic computing circuit based on efficient and high-speed electro-optic conversion Open
The surge in artificial intelligence applications calls for scalable, high-speed, and low-energy computation methods. Computing with photons is promising due to the intrinsic parallelism, high bandwidth, and low latency of photons. However…
View article: Efficient and high-fidelity entanglement in cavity QED without high cooperativity
Efficient and high-fidelity entanglement in cavity QED without high cooperativity Open
The so-called state-carving protocol generates high-fidelity entangled states at an atom-cavity interface without requiring high cavity cooperativity. However, this protocol is limited to 50\% efficiency, which restricts its applicability.…
View article: A sub-volt near-IR lithium tantalate electro-optic modulator
A sub-volt near-IR lithium tantalate electro-optic modulator Open
We demonstrate a low-loss integrated electro-optic Mach-Zehnder modulator in thin-film lithium tantalate at 737 nm, featuring a low half-wave voltage-length product of 0.65 V$\cdot$cm, an extinction ratio of 30 dB, low optical loss of 5.3 …
View article: Robust Poling and Frequency Conversion on Thin-Film Periodically Poled Lithium Tantalate
Robust Poling and Frequency Conversion on Thin-Film Periodically Poled Lithium Tantalate Open
We explore a robust fabrication process for periodically-poled thin-film lithium tantalate (PP-TFLT) by systematically varying fabrication parameters and confirming the quality of inverted domains with second-harmonic microscopy (SHM). We …
View article: Wavelength-accurate and wafer-scale process for nonlinear frequency mixers in thin-film lithium niobate
Wavelength-accurate and wafer-scale process for nonlinear frequency mixers in thin-film lithium niobate Open
Recent advancements in thin-film lithium niobate (TFLN) photonics have led to a new generation of high-performance electro-optic devices, including modulators, frequency combs, and microwave-to-optical transducers. However, the broader ado…
View article: Entanglement swapping systems toward a quantum internet
Entanglement swapping systems toward a quantum internet Open
We demonstrate conditional entanglement swapping, i.e. teleportation of entanglement, between time-bin qubits at the telecommunication wavelength of 1536.4 nm with high fidelity of 87\%. Our system is deployable, utilizing modular, off-the…
View article: Integrated electro-optic digital-to-analog link for efficient computing and arbitrary waveform generation
Integrated electro-optic digital-to-analog link for efficient computing and arbitrary waveform generation Open
The rapid growth in artificial intelligence and modern communication systems demands innovative solutions for increased computational power and advanced signaling capabilities. Integrated photonics, leveraging the analog nature of electrom…
View article: Integrated lithium niobate photonic computing circuit based on efficient and high-speed electro-optic conversion
Integrated lithium niobate photonic computing circuit based on efficient and high-speed electro-optic conversion Open
Here we show a photonic computing accelerator utilizing a system-level thin-film lithium niobate circuit which overcomes this limitation. Leveraging the strong electro-optic (Pockels) effect and the scalability of this platform, we demonst…
View article: DC-stable electro-optic modulators using thin-film lithium tantalate
DC-stable electro-optic modulators using thin-film lithium tantalate Open
We demonstrate telecommunication-wavelength Pockels electro-optic modulators in thin-film lithium tantalate (TFLT) with superior DC stability compared to equivalent thin-film lithium niobate (TFLN) modulators. Less than 1 dB output power f…
View article: Optical investigations of coherence and relaxation dynamics of a thulium-doped yttrium gallium garnet crystal at sub-kelvin temperatures for optical quantum memory
Optical investigations of coherence and relaxation dynamics of a thulium-doped yttrium gallium garnet crystal at sub-kelvin temperatures for optical quantum memory Open
Rare-earth ion-doped crystals are of great interest for quantum memories, a central component in future quantum repeaters. To assess the promise of 1 Tm 3+ -doped yttrium gallium garnet (Tm:YGG), we report measurements of optical cohere…
View article: Cavity-enhanced narrowband spectral filters using rare-earth ions doped in thin-film lithium niobate
Cavity-enhanced narrowband spectral filters using rare-earth ions doped in thin-film lithium niobate Open
On-chip optical filters are fundamental components in optical signal processing. While rare-earth ion-doped crystals offer ultra-narrow optical filtering via spectral hole burning, their applications have primarily been limited to those us…
View article: Free-space quantum information platform on a chip
Free-space quantum information platform on a chip Open
Emerging technologies that employ quantum physics offer fundamental enhancements in information processing tasks, including sensing, communications, and computing. Here, we introduce the quantum phased array, which generalizes the operatin…
View article: Optical Investigations of Coherence and Relaxation Dynamics of a Thulium-doped Yttrium Gallium Garnet Crystal at sub-Kelvin Temperatures for Optical Quantum Memory
Optical Investigations of Coherence and Relaxation Dynamics of a Thulium-doped Yttrium Gallium Garnet Crystal at sub-Kelvin Temperatures for Optical Quantum Memory Open
Rare-earth ion-doped crystals are of great interest for quantum memories, a central component in future quantum repeaters. To assess the promise of 1$\%$ Tm$^{3+}$-doped yttrium gallium garnet (Tm:YGG), we report measurements of optical co…
View article: Entanglement of nanophotonic quantum memory nodes in a telecom network
Entanglement of nanophotonic quantum memory nodes in a telecom network Open
A key challenge in realizing practical quantum networks for long-distance quantum communication involves robust entanglement between quantum memory nodes connected by fibre optical infrastructure 1–3 . Here we demonstrate a two-node quantu…
View article: Stable electro-optic modulators using thin-film lithium tantalate
Stable electro-optic modulators using thin-film lithium tantalate Open
We demonstrate electro-optic modulators realized in low-loss thin-film lithium tantalate with superior DC-stability (<1 dB power fluctuation from quadrature with 12.1 dBm input) compared to equivalent thin-film lithium niobate modulators (…
View article: Wavelength-accurate and wafer-scale process for nonlinear frequency mixers in thin-film lithium niobate
Wavelength-accurate and wafer-scale process for nonlinear frequency mixers in thin-film lithium niobate Open
Recent advancements in thin-film lithium niobate (TFLN) photonics have led to a new generation of high-performance electro-optic devices, including modulators, frequency combs, and microwave-to-optical transducers. However, the broader ado…
View article: Wavelength-accurate and wafer-scale process for nonlinear frequency mixers in thin-film lithium niobate
Wavelength-accurate and wafer-scale process for nonlinear frequency mixers in thin-film lithium niobate Open
Recent advancements in thin-film lithium niobate (TFLN) photonics have led to a new generation of high-performance electro-optic devices, including modulators, frequency combs, and microwave-to-optical transducers. However, the broader ado…
View article: Integrated electro-optics on thin-film lithium niobate
Integrated electro-optics on thin-film lithium niobate Open
Electro-optics serves as the crucial bridge between electronics and photonics, unlocking a wide array of applications ranging from communications and computing to sensing and quantum information. Integrated electro-optics approaches in par…
View article: Feasibility of Hybrid Electro- and Acousto-Dynamical Systems for Quantum Optical Networks
Feasibility of Hybrid Electro- and Acousto-Dynamical Systems for Quantum Optical Networks Open
We present results on an exploratory research program that aims to study the feasibility of novel, sustained, dense, and efficient quantum information generation, storage, retrieval, relay and distribution devices and systems towards futur…
View article: Twenty-nine million Intrinsic Q-factor Monolithic Microresonators on Thin Film Lithium Niobate
Twenty-nine million Intrinsic Q-factor Monolithic Microresonators on Thin Film Lithium Niobate Open
The recent emergence of thin-film lithium niobate (TFLN) has extended the landscape of integrated photonics. This has been enabled by the commercialization of TFLN wafers and advanced nanofabrication of TFLN such as high-quality dry etchin…
View article: Dark Matter Searches on a Photonic Chip
Dark Matter Searches on a Photonic Chip Open
Dark matter (DM) with masses of order an electronvolt or below can have a non-zero coupling to electromagnetism. In these models, the ambient DM behaves as a new classical source in Maxwell's equations, which can excite potentially detecta…
View article: High-rate multiplexed entanglement source based on time-bin qubits for advanced quantum networks
High-rate multiplexed entanglement source based on time-bin qubits for advanced quantum networks Open
Entanglement distribution based on time-bin qubits is an attractive option for emerging quantum networks. We demonstrate a 4.09-GHz repetition rate source of photon pairs entangled across early and late time bins separated by 80 ps. Simult…
View article: Cavity-enhanced narrowband spectral filters using rare-earth ions doped in thin-film lithium niobate
Cavity-enhanced narrowband spectral filters using rare-earth ions doped in thin-film lithium niobate Open
On-chip optical filters are fundamental components in optical signal processing. While rare-earth ion-doped crystals offer ultra-narrow optical filtering via spectral hole burning, their applications have primarily been limited to those us…
View article: Development of a Boston-area 50-km fiber quantum network testbed
Development of a Boston-area 50-km fiber quantum network testbed Open
Distributing quantum information between remote systems will necessitate the integration of emerging quantum components with existing communication infrastructure. This requires understanding the channel-induced degradations of the transmi…
View article: Telecom Networking with a Diamond Quantum Memory
Telecom Networking with a Diamond Quantum Memory Open
Practical quantum networks require interfacing quantum memories with existing channels and systems that operate in the telecom band. Here we demonstrate low-noise, bidirectional quantum frequency conversion that enables a solid-state quant…