C. J. Xin, Jatadhari Mishra, Changchen Chen, Di Zhu, Amirhassan Shams-Ansari, Carsten Langrock, Neil Sinclair, Franco N. C. Wong, M. M. Fejer, and Marko Lončar. 5/26/2022. “
Spectrally separable photon-pair generation in dispersion engineered thin-film lithium niobate.” Optics Letters, 47, 11, Pp. 2830-2833.
Publisher's VersionAbstractExisting nonlinear-optic implementations of pure, unfiltered heralded single-photon sources do not offer the scalability required for densely integrated quantum networks. Additionally, lithium niobate has hitherto been unsuitable for such use due to its material dispersion. We engineer the dispersion and the quasi-phasematching conditions of a waveguide in the rapidly emerging thin-film lithium niobate platform to generate spectrally separable photon pairs in the telecommunications band. Such photon pairs can be used as spectrally pure heralded single-photon sources in quantum networks. We estimate a heralded-state spectral purity of >94% based on joint spectral intensity measurements. Further, a joint spectral phase-sensitive measurement of the unheralded time-integrated second-order correlation function yields a heralded-state purity of (86±5)%.
[PDF] H. Atikian, N. Sinclair, P. Latawiec, X. Xiong, S. Meesala, S. Gauthier, D. Wintz, J. Randi, D. Bernot, S. DeFrances, J. Thomas, M. Roman, S. Durrant, F. Capasso, and M. Loncar. 5/11/2022. “
Diamond mirrors for high-power continous-wave lasers.” Nature Communications, 13, Pp. 2610.
Publisher's Version Cleaven Chia, Bartholomeus Machielse, Amirhassan Shams-Ansari, and Marko Loncar. 4/12/2022. “
Development of new hard masks for reactive ion beam angled etching of diamond.” Optics Express, 30, Pp. 14189.
Publisher's Version
[PDF] Amirhassan Shams-Ansari, Mengjie Yu, Zaijun Chen, Christian Reimer, Mian Zhang, Nathalie Picqué, and Marko Lončar. 4/12/2022. “
An integrated lithium-niobate electro-optic platform for spectrally tailored dual-comb spectroscopy.” Communications Physics, 5, Pp. 88.
Publisher's VersionAbstractA high-resolution broad-spectral-bandwidth spectrometer on a chip would create new opportunities for gas-phase molecular fingerprinting, especially in environmental sensing. A resolution high enough to observe transitions at atmospheric pressure and the simultaneous sensitive detection of multiple atoms or molecules are the key challenges. Here, an electro-optic microring-based dualcomb interferometer, fabricated on a low-loss lithium-niobate-on-insulator nanophotonic platform, demonstrates significant progress towards such an achievement. Spectra spanning 1.6 THz (53 cm-1) at a resolution of 10 GHz (0.33 cm-1) are obtained in a single measurement without requiring frequency scanning or moving parts. The frequency agility of the system enables spectrally-tailored multiplexed sensing, which allows for interrogation of non-adjacent spectral regions, here separated by 6.6 THz (220 cm-1), without compromising the signal-to-noise ratio.
[PDF] Amirhassan Shams-Ansari, Dylan Renaud, Rebecca Cheng, Linbo Shao, Lingyan He, Di Zhu, Mengjie Yu, Hannah R. Grant, Leif Johansson, Mian Zhang, and Marko Loncar. 4/6/2022. “
Electrically pumped high power laser transmitter integrated on thin-film lithium niobate.” Optica, 9, Pp. 408.
Publisher's VersionAbstractIntegrated thin-film lithium niobate (TFLN) photonics has emerged as a promising platform for realization of high-performance chip-scale optical systems. Of particular importance are TFLN electro-optic modulators featuring high-linearity, low driving voltage and low-propagation loss. However, fully integrated system requires integration of high power, low noise, and narrow linewidth lasers on TFLN chip. Here we achieve this goal, and demonstrate integrated high-power lasers on TFLN platform with up to 60 mW of optical power in the waveguides. We use this platform to realize a high-power transmitter consisting an electrically-pumped laser integrated with a 50 GHz modulator.
arxiv_laser.pdf Keith Powell, Liwei Li, Amirhassan Shams-Ansari, Jianfu Wang, Debin Meng, Neil Sinclair, Jiangdong Deng, Marko Lončar, and Xiaoke Yi. 4/5/2022. “
Integrated silicon carbide electro-optic modulator.” Nature Communications, 13, Pp. 1851.
Publisher's Version Smarak Maity*, Benjamin Pingault*, Graham Joe, Michelle Chalupnik, Daniel Assumpção, Eliza Cornell, Linbo Shao, and Marko Lončar. 3/23/2022. “
Mechanical control of a single nuclear spin.” Physical Review X, 12, 1, Pp. 011056.
Publisher's Version Cristian Cortes, Pascal Lefebvre, Nikolai Lauk, Michael David, Neil Sinclair, Stephen Gray, and Daniel Oblak. 3/22/2022. “
Sample-efficient adaptive calibration of quantum networks using Bayesian optimization.” Physical Review Applied, 17, Pp. 034067 .
Publisher's Version