Michael J. Burek, Charles Meuwly, Ruffin E. Evans, Mihir K. Bhaskar, Alp Sipahigil, Srujan Meesala, Denis D. Sukachev, Christian T. Nguyen, Jose L. Pacheco, Edward Bielejec, Mikhail D. Lukin, and Marko Lončar. Submitted. “A fiber-coupled diamond quantum nanophotonic interface.” arXiv: 1612.05285. Publisher's Version [PDF]
Zin Lin, Marko Lončar, and Alejandro W. Rodriguez. Submitted. “Topology optimization of multi-track ring resonators and 2D microcavities for nonlinear frequency conversion.” arXiv:1701.05628. Publisher's Version [PDF]
Zin Lin, Benedikt Groever, Federico Capasso, Alejandro W. Rodriguez, and Marko Lončar. Submitted. “Topology Optimized Multi-layered Meta-optics.” arXiv:1706.06715. Publisher's Version [PDF]
Yoshitomo Okawachi, Mengjie Yu, Vivek Venkataraman, Pawel M. Latawiec, Austin G. Griffith, Michal Lipson, Marko Lončar, and Alexande Gaeta. Submitted. “Competition between Raman and Kerr effects in microresonator comb generation.” arXiv:1705.01900. Publisher's Version [PDF]
Young-Ik Sohn*, Srujan Meesala*, Benjamin Pingault*, Haig A. Atikian, Jeffrey Holzgrafe, Mustafa Gündoğan, Camille Stavrakas, Megan J. Stanley, Alp Sipahigil, Joonhee Choi, Mian Zhang, Jose L. Pacheco, John Abraham, Edward Bielejec, Mikhail D. Lukin, Mete Atatüre, and Marko Lončar. Submitted. “Engineering a diamond spin-qubit with a nano-electro-mechanical system.” arXiv:1706.03881. arXiv VersionAbstract
The realisation of a distributed quantum network requires long-lived memory qubits such as electron spins efficiently interfaced with indistinguishable optical photons. Due to dynamic fluctuations in the solid-state environment, it remains a challenge to identify a solid-state emitter that simultaneously offers excellent optical properties and long-lived qubit coherence. Specifically, the impact of thermal phonons is irreversible, and fundamentally limits qubit coherence. Here, we employ silicon-vacancy (SiV) colour centres in diamond, known for their excellent optical properties, and demonstrate an approach to improve their phonon-limited spin coherence. Using a diamond nano-electro-mechanical system (NEMS), we control the SiV electronic structure by tuning strain, allowing us to both probe and quench the interaction of the colour centre with phonons. This approach also provides a scalable platform to overcome optical inhomogeneity among emitters. The large wavelength tunability and improved spin coherence that we demonstrate make the SiV an attractive platform for the realisation of a quantum network.
Main text Supplementary information
Cheng Wang, Zhaoyi Li, Myoung-Hwan Kim, Xiao Xiong, Xi-Feng Ren, Guang-Can Guo, Nanfang Yu, and Marko Loncar. Submitted. “Metasurface-assisted phase-matching-free second harmonic generation in lithium niobate waveguides.” arXiv:1708.02889. Publisher's Version [PDF]
Cheng Wang, Mian Zhang, Brian Stern, Michal Lipson, and Marko Loncar. Submitted. “Nanophotonic Lithium Niobate Electro-optic Modulators.” arXiv:1701.06470. Publisher's Version [PDF]
Zin Lin, Lysander Christakis, Yang Li, Eric Mazur, Alejandro W. Rodriguez, and Marko Lončar. Submitted. “Topology-optimized Dual-Polarization Dirac Cones.” arXiv:1705.03574. Publisher's Version [PDF]
Mihir K. Bhaskar, Denis D. Sukachev, Alp Sipahigil, Ruffin E. Evans, Michael J. Burek, Christian T. Nguyen, Lachlan J. Rogers, Petr Siyushev, Mathias H. Metsch, Hongkun Park, Fedor Jelezko, Marko Lončar, and Mikhail D. Lukin. 5/31/2017. “Quantum Nonlinear Optics with a Germanium-Vacancy Color Center in a Nanoscale Diamond Waveguide.” Physical Review Letters, 118, Pp. 223603. Publisher's Version [PDF]
Daryl I. Vulis, Yang Li, Orad Reshef, Philip Camayd-Muñoz, Mei Yin, Shota Kita, Marko Lončar, and Eric Mazur. 5/29/2017. “Monolithic CMOS-compatible zero-index metamaterials.” Optics Express, 25, 11, Pp. 12381-12399. Publisher's Version [PDF]
Carmen Palacios-Berraquero, Dhiren M. Kara, Alejandro R.-P. Montblanch, Matteo Barbone, Pawel Latawiec, Duhee Yoon, Anna K. Ott, Marko Lončar, Andrea C. Ferrari, and Mete Atature. 5/22/2017. “Large-scale quantum-emitter arrays in atomically thin semiconductors.” Nature Communications, 8, Pp. 15093. Publisher's Version [PDF]
S. Bogdanovic, S.B. van Dam, C. Bonato, L.C. Coenen, A.J. Zwerver, B. Hensen, M.S.Z. Liddy, T. Fink, A. Reiserer, M. Loncar, and R. Hanson. 4/24/2017. “Design and low-temperature characterization of a tunable microcavity for diamond-based quantum networks.” Applied Physics Letters, 110, Pp. 171103. Publisher's VersionAbstract

Freestanding diamond nanostructures are etched from a bulk diamond substrate and integrated with evanescently coupled superconducting nanowire single-photon detectors.

Zhaoyi Li, Myoung-Hwan Kim, Cheng Wang, Zhaohong Han, Sajan Shrestha, Adam Christopher Overvig, Ming Lu, Aaron Stein, Anuradha Murthy Agarwal, Marko Lončar, and Nanfang Yu. 4/17/2017. “Controlling propagation and coupling of waveguide modes using phase-gradient metasurfaces.” Nature Nanotechnology, 12, 5. Publisher's Version [PDF]
Shota Kita, Yang Li, Philip Muñoz, Orad Reshef, Daryl I. Vulis, Robert W. Day, Eric Mazur, and Marko Lončar. 4/3/2017. “On-chip all-dielectric fabrication-tolerant zero-index metamaterials.” Optics Express, 25, 7, Pp. 8326-8334. Publisher's VersionAbstract

Zero-index metamaterials (ZIMs) offer unprecedented ways to manipulate the flow of light, and are of interest for wide range of applications including optical cloaking, super-coupling, and unconventional phase-matching properties in nonlinear optics. Impedance-matched ZIMs can be obtained through a photonic Dirac-cone (PDC) dispersion induced by an accidental degeneracy of an electric monopole and a transverse magnetic dipole mode at the center of the Brillouin zone. Therefore, PDC is very sensitive to fabrication imperfections. In this work, we propose and demonstrate fabrication-tolerant all-dielectric ZIM in telecom regime that supports near PDC dispersion over much wider parameter space than conventional designs. The prism device integrated with Si photonics is fabricated and measured for the verification.

Haig Atikian, Srujan Meesala, Michael Burek, Young-Ik Sohn, Johan Israelian, Adarsh Patri, Nigel Clarke, Alp Sipahigil, Ruffin Evans, Denis Sukachev, Robert Westervelt, Mikhail Lukin, and Marko Loncar. 3/22/2017. “Novel fabrication of diamond nanophotonics coupled to single-photon detectors.” SPIE Newsroom. Publisher's VersionAbstract

Freestanding diamond nanostructures are etched from a bulk diamond substrate and integrated with evanescently coupled superconducting nanowire single-photon detectors.

Cheng Wang, Xiao Xiong, Nicolas Andrade, Vivek Venkataraman, Xi-Feng Ren, Guang-Can Guo, and Marko Lončar. 3/20/2017. “Second harmonic generation in nano-structured thin-film lithium niobate waveguides.” Optics Express, 25, 6, Pp. 6963-6973. Publisher's Version [PDF]
Kelvin Chung, Timothy J. Karle, Cheng Wang, Marko Lončar, and Snjezana Tomljenovic-Hanic. 3/1/2017. “Hybrid nanodiamond and titanium dioxide nanobeam cavity design .” Optical Materials Express, 7, 3, Pp. 785-792. Publisher's Version [PDF]
Haig A. Atikian, Pawel Latawiec, Michael J. Burek, Young-Ik Sohn, Srujan Meesala, Normand Gravel, Ammar B. Kouki, and Marko Loncar. 2017. “Freestanding nanostructures via reactive ion beam angled etching.” APL Photonics, 2, Pp. 051301. Publisher's Version [PDF]
Linbo Shao, Mian Zhang, Matthew Markham, Andrew M. Edmonds, and Marko Lončar. 12/15/2016. “Diamond Radio Receiver: Nitrogen-Vacancy Centers as Fluorescent Transducers of Microwave Signals.” Physical Review Applied, 6, Pp. 064008. Publisher's Version [PDF]
Michael J. Burek, Justin D. Cohen, Seán M. Meenehan, Nayera El-Sawah, Cleaven Chia, Thibaud Ruelle, Srujan Meesala, Jake Rochman, Haig A. Atikian, Matthew Markham, Daniel J. Twitchen, Mikhail D. Lukin, Oskar Painter, and Marko Lončar. 11/18/2016. “Diamond optomechanical crystals.” Optica, 3, 12, Pp. 1404-1411. Publisher's Version [PDF]