Marc-Antoine Lemonde, Srujan Meesala, Alp Sipahigil, Martin J. A. Schuetz, Mikhail D. Lukin, Marko Loncar, and Peter Rabl. 5/25/2018. “
Phonon networks with SiV centers in diamond waveguides.” Physical Review Letters, 120, Pp. 213603.
Publisher's Version [main PDF] [supplementary 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. 5/22/2018. “
Controlling the coherence of a diamond spin qubit through its strain environment.” Nature Communications 9, Pp. 2012.
arXiv VersionAbstractThe uncontrolled interaction of a quantum system with its environment is detrimental for quantum coherence. In the context of solid-state qubits, techniques to mitigate the impact of fluctuating electric and magnetic fields from the environment are well-developed. In contrast, suppression of decoherence from thermal lattice vibrations is typically achieved only by lowering the temperature of operation. Here, we use a nano-electro-mechanical system (NEMS) to mitigate the effect of thermal phonons on a solid-state quantum emitter without changing the system temperature. We study the silicon-vacancy (SiV) colour centre in diamond which has optical and spin transitions that are highly sensitive to phonons. First, we show that its electronic orbitals are highly susceptible to local strain, leading to its high sensitivity to phonons. By controlling the strain environment, we manipulate the electronic levels of the emitter to probe, control, and eventually, suppress its interaction with the thermal phonon bath. Strain control allows for both an impressive range of optical tunability and significantly improved spin coherence. Finally, our findings indicate that it may be possible to achieve strong coupling between the SiV spin and single phonons, which can lead to the realisation of phonon-mediated quantum gates and nonlinear quantum phononics.
[PDF] Zin Lin, Benedikt Groever, Federico Capasso, Alejandro W. Rodriguez, and Marko Lončar. 4/20/2018. “
Topology Optimized Multi-layered Meta-optics.” Physical Review Applied, 9, Pp. 044030.
Publisher's Version [PDF] Zin Lin, Lysander Christakis, Yang Li, Eric Mazur, Alejandro W. Rodriguez, and Marko Lončar. 2/23/2018. “
Topology-optimized Dual-Polarization Dirac Cones.” Physical Review B, 97, Pp. 081408(R) .
Publisher's Version [PDF] Jingyuan Linda Zhang, Shuo Sun, Michael J Burek, Constantin Dory, Yan-Kai Tzeng, Kevin A Fischer, Yousif Kelaita, Konstantinos G Lagoudakis, Marina Radulaski, Zhi-Xun Shen, Nicholas A Melosh, Steven Chu, Marko Loncar, and Jelena Vuckovic. 1/29/2018. “
Strongly Cavity-Enhanced Spontaneous Emission from Silicon-Vacancy Centers in Diamond.” Nano Letters, 18, 2, Pp. 1360-1365.
Publisher's Version [PDF] Cheng Wang, Mian Zhang, Brian Stern, Michal Lipson, and Marko Loncar. 1/22/2018. “
Nanophotonic Lithium Niobate Electro-optic Modulators.” Optics Express, 26, 2, Pp. 1547-1555.
Publisher's Version [PDF] Pawel Latawiec, Vivek Venkataraman, Amirhassan Shams-Ansari, Matthew Markham, and Marko Loncar. 1/15/2018. “
An integrated diamond Raman laser pumped in the near-visible.” Optics Letters Vol. 43, Issue 2, pp. 318-321 (2018).
arXiv VersionAbstractUsing a high-Q diamond microresonator (Q > 300,000) interfaced with high-power-handling directly-written doped-glass waveguides, we demonstrate a Raman laser in an integrated platform pumped in the near-visible. Both TM-to-TE and TE-to-TE lasing is observed, with a Raman lasing threshold as low as 20 mW and Stokes power of over 1 mW at 120 mW pump power. Stokes emission is tuned over a 150 nm (60 THz) bandwidth around 875 nm wavelength, corresponding to 17.5% of the center frequency.
[PDF]