de Leon, Nathalie Pulmones

Person:
de Leon, Nathalie Pulmones

Last Name

de Leon

First Name

Nathalie Pulmones

Name

de Leon, Nathalie Pulmones

Full item page

Search Results

Now showing 1 - 9 of 9

Nuclear magnetic resonance detection and spectroscopy of single proteins using quantum logic
(American Association for the Advancement of Science (AAAS), 2016) Lovchinsky, Igor; Sushkov, Alexander; Urbach, Elana; de Leon, Nathalie Pulmones; Choi, Soonwon; De Greve, Kristiaan; Evans, Ruffin; Gertner, Rona; Bersin, Eric; Muller, Christopher Michael; McGuinness, L.; Jelezko, F.; Walsworth, Ronald; Park, Hongkun; Lukin, Mikhail
Nuclear magnetic resonance spectroscopy is a powerful tool for the structural analysis of organic compounds and biomolecules but typically requires macroscopic sample quantities. We use a sensor, which consists of two quantum bits corresponding to an electronic spin and an ancillary nuclear spin, to demonstrate room temperature magnetic resonance detection and spectroscopy of multiple nuclear species within individual ubiquitin proteins attached to the diamond surface. Using quantum logic to improve readout fidelity and a surface-treatment technique to extend the spin coherence time of shallow nitrogen-vacancy centers, we demonstrate magnetic field sensitivity sufficient to detect individual proton spins within 1 second of integration. This gain in sensitivity enables high-confidence detection of individual proteins and allows us to observe spectral features that reveal information about their chemical composition.
Coupling a Single Trapped Atom to a Nanoscale Optical Cavity
(American Association for the Advancement of Science (AAAS), 2013) Thompson, Jeffrey Douglas; Tiecke, Tobias; de Leon, Nathalie Pulmones; Feist, J.; Akimov, Alexey; Gullans, Michael John; Zibrov, Alexander; Vuletic, V.; Lukin, Mikhail
Hybrid quantum devices, in which dissimilar quantum systems are combined in order to attain qualities not available with either system alone, may enable far-reaching control in quantum measurement, sensing, and information processing. A paradigmatic example is trapped ultracold atoms, which offer excellent quantum coherent properties, coupled to nanoscale solid-state systems, which allow for strong interactions. We demonstrate a deterministic interface between a single trapped rubidium atom and a nanoscale photonic crystal cavity. Precise control over the atom's position allows us to probe the cavity near-field with a resolution below the diffraction limit and to observe large atom-photon coupling. This approach may enable the realization of integrated, strongly coupled quantum nano-optical circuits.
Stretchable Photonic Crystal Cavity with Wide Frequency Tunability
(American Chemical Society (ACS), 2013) Yu, Chunxiao; Kim, Hyunwoo; de Leon, Nathalie Pulmones; Frank, Ian Ward; Robinson, Jacob T.; McCutcheon, Murray; Liu, Mingzhao; Lukin, Mikhail; Loncar, Marko; Park, Hongkun
We report a new approach for realizing a flexible photonic crystal (PC) cavity that enables wide-range tuning of its resonance frequency. Our PC cavity consists of a regular array of silicon nanowires embedded in a polydimethylsiloxane (PDMS) matrix and exhibits a cavity resonance in the telecommunication band that can be reversibly tuned over 60 nm via mechanical stretching—a record for two-dimensional (2D) PC structures. These mechanically reconfigurable devices could find potential applications in integrated photonics, sensing in biological systems, and smart materials.
Tailoring Light-Matter Interaction with a Nanoscale Plasmon Resonator
(American Physical Society (APS), 2012) de Leon, Nathalie Pulmones; Shields, Brendan John; Yu, C; Englund, Dirk E.; Akimov, Alexey; Lukin, Mikhail; Park, Hongkun
We propose and demonstrate a new approach for achieving enhanced light-matter interactions with quantum emitters. Our approach makes use of a plasmon resonator composed of defect-free, highly crystalline silver nanowires surrounded by patterned dielectric distributed Bragg reflectors. These resonators have an effective mode volume (Veff) 2 orders of magnitude below the diffraction limit and a quality factor (Q) approaching 100, enabling enhancement of spontaneous emission rates by a factor exceeding 75 at the cavity resonance. We also show that these resonators can be used to convert a broadband quantum emitter to a narrow-band single-photon source with color-selective emission enhancement.
Free-Standing Mechanical and Photonic Nanostructures in Single-Crystal Diamond
(American Chemical Society (ACS), 2012) Burek, Michael; de Leon, Nathalie Pulmones; Shields, Brendan John; Hausmann, Birgit Judith Maria; Chu, Yiwen; Quan, Qimin; Zibrov, Alexander; Park, Hongkun; Lukin, Mikhail; Loncar, Marko
A variety of nanoscale photonic, mechanical, electronic, and optoelectronic devices require scalable thin film fabrication. Typically, the device layer is defined by thin film deposition on a substrate of a different material, and optical or electrical isolation is provided by the material properties of the substrate or by removal of the substrate. For a number of materials this planar approach is not feasible, and new fabrication techniques are required to realize complex nanoscale devices. Here, we report a three-dimensional fabrication technique based on anisotropic plasma etching at an oblique angle to the sample surface. As a proof of concept, this angled-etching methodology is used to fabricate free-standing nanoscale components in bulk single-crystal diamond, including nanobeam mechanical resonators, optical waveguides, and photonic crystal and microdisk cavities. Potential applications of the fabricated prototypes range from classical and quantum photonic devices to nanomechanical-based sensors and actuators.
Coupling of NV Centers to Photonic Crystal Nanobeams in Diamond
(American Chemical Society (ACS), 2013) Hausmann, Birgit Judith Maria; Shields, Brendan John; Quan, Qimin; Chu, Yiwen; de Leon, Nathalie Pulmones; Evans, Ruffin; Burek, Michael; Zibrov, Alexander; Markham, M.; Twitchen, D. J.; Park, Hongkun; Lukin, Mikhail; Loncar, Marko
The realization of efficient optical interfaces for solid-state atom-like systems is an important problem in quantum science with potential applications in quantum communications and quantum information processing. We describe and demonstrate a technique for coupling single nitrogen vacancy (NV) centers to suspended diamond photonic crystal cavities with quality factors up to 6000. Specifically, we present an enhancement of the NV center’s zero-phonon line fluorescence by a factor of 7 in low-temperature measurements.
Nanophotonic quantum phase switch with a single atom
(Nature Publishing Group, 2014) Tiecke, Tobias; Thompson, Jeffrey Douglas; de Leon, Nathalie Pulmones; Liu, Li; Vuletić, V.; Lukin, Mikhail
By analogy to transistors in classical electronic circuits, quantum optical switches are important elements of quantum circuits and quantum networks1, 2, 3. Operated at the fundamental limit where a single quantum of light or matter controls another field or material system4, such a switch may enable applications such as long-distance quantum communication5, distributed quantum information processing2 and metrology6, and the exploration of novel quantum states of matter7. Here, by strongly coupling a photon to a single atom trapped in the near field of a nanoscale photonic crystal cavity, we realize a system in which a single atom switches the phase of a photon and a single photon modifies the atom’s phase. We experimentally demonstrate an atom-induced optical phase shift8 that is nonlinear at the two-photon level9, a photon number router that separates individual photons and photon pairs into different output modes10, and a single-photon switch in which a single ‘gate’ photon controls the propagation of a subsequent probe field11, 12. These techniques pave the way to integrated quantum nanophotonic networks involving multiple atomic nodes connected by guided light.
Coherent Optical Transitions in Implanted Nitrogen Vacancy Centers
(American Chemical Society (ACS), 2014) Chu, Y.; de Leon, Nathalie Pulmones; Shields, B.J.; Hausmann, B.; Evans, R.; Togan, E.; Burek, Michael; Markham, M.; Stacey, A.; Zibrov, Alexander; Yacoby, Amir; Twitchen, D.J.; Loncar, Marko; Park, H.; Maletinsky, P.; Lukin, Mikhail
We report the observation of stable optical transitions in nitrogen-vacancy (NV) centers created by ion implantation. Using a combination of high temperature annealing and subsequent surface treatment, we reproducibly create NV centers with zero-phonon lines (ZPL) exhibiting spectral diffusion that is close to the lifetime-limited optical line width. The residual spectral diffusion is further reduced by using resonant optical pumping to maintain the NV– charge state. This approach allows for placement of NV centers with excellent optical coherence in a well-defined device layer, which is a crucial step in the development of diamond-based devices for quantum optics, nanophotonics, and quantum information science.
Efficient Readout of a Single Spin State in Diamond via Spin-to-Charge Conversion
(American Physical Society (APS), 2015) Shields, Brendan John; Unterreithmeier, Quirin; de Leon, Nathalie Pulmones; Park, Helen; Lukin, Mikhail
Efficient readout of individual electronic spins associated with atomlike impurities in the solid state is essential for applications in quantum information processing and quantum metrology. We demonstrate a new method for efficient spin readout of nitrogen-vacancy (NV) centers in diamond. The method is based on conversion of the electronic spin state of the NV to a charge-state distribution, followed by single-shot readout of the charge state. Conversion is achieved through a spin-dependent photoionization process in diamond at room temperature. Using NVs in nanofabricated diamond beams, we demonstrate that the resulting spin readout noise is within a factor of 3 of the spin projection noise level. Applications of this technique for nanoscale magnetic sensing are discussed.