Kiyoul Yang

All Publications

• Inverse-designed non-reciprocal pulse router for chip-based LiDAR NATURE PHOTONICS Yang, K., Skarda, J., Cotrufo, M., Dutt, A., Ahn, G., Sawaby, M., Vercruysse, D., Arbabian, A., Fan, S., Alu, A., Vuckovic, J. 2020

  View details for DOI 10.1038/s41566-020-0606-0

  View details for Web of Science ID 000521525600003

• Earth rotation measured by a chip-scale ring laser gyroscope NATURE PHOTONICS Lai, Y., Suh, M., Lu, Y., Shen, B., Yang, Q., Wang, H., Li, J., Lee, S., Yang, K., Vahala, K. 2020

  View details for DOI 10.1038/s41566-020-0588-y

  View details for Web of Science ID 000514050900002

• On-chip integrated laser-driven particle accelerator. Science (New York, N.Y.) Sapra, N. V., Yang, K. Y., Vercruysse, D., Leedle, K. J., Black, D. S., England, R. J., Su, L., Trivedi, R., Miao, Y., Solgaard, O., Byer, R. L., Vučkovicć, J. 2020; 367 (6473): 79–83

  Abstract

  Particle accelerators represent an indispensable tool in science and industry. However, the size and cost of conventional radio-frequency accelerators limit the utility and reach of this technology. Dielectric laser accelerators (DLAs) provide a compact and cost-effective solution to this problem by driving accelerator nanostructures with visible or near-infrared pulsed lasers, resulting in a 104 reduction of scale. Current implementations of DLAs rely on free-space lasers directly incident on the accelerating structures, limiting the scalability and integrability of this technology. We present an experimental demonstration of a waveguide-integrated DLA that was designed using a photonic inverse-design approach. By comparing the measured electron energy spectra with particle-tracking simulations, we infer a maximum energy gain of 0.915 kilo-electron volts over 30 micrometers, corresponding to an acceleration gradient of 30.5 mega-electron volts per meter. On-chip acceleration provides the possibility for a completely integrated mega-electron volt-scale DLA.

  View details for DOI 10.1126/science.aay5734

  View details for PubMedID 31896715

• 4H-silicon-carbide-on-insulator for integrated quantum and nonlinear photonics NATURE PHOTONICS Lukin, D. M., Dory, C., Guidry, M. A., Yang, K., Mishra, S. D., Trivedi, R., Radulaski, M., Sun, S., Vercruysse, D., Ahn, G., Vuckovic, J. 2020; 14: 330-334

  View details for DOI 10.1038/s41566-019-0556-6

• Architecture for the photonic integration of an optical atomic clock OPTICA Newman, Z. L., Maurice, V., Drake, T., Stone, J. R., Briles, T. C., Spencer, D. T., Fredrick, C., Li, Q., Westly, D., Ilic, B. R., Shen, B., Suh, M., Yang, K., Johnson, C., Johnson, D. S., Hollberg, L., Vahala, K. J., Srinivasan, K., Diddams, S. A., Kitching, J., Papp, S. B., Hummon, M. T. 2019; 6 (5): 680–85

  View details for DOI 10.1364/OPTICA.6.000680

  View details for Web of Science ID 000468373300021

• Inverse Design and Demonstration of Broadband Grating Couplers IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS Sapra, N. V., Vercruysse, D., Su, L., Yang, K., Skarda, J., Piggott, A. Y., Vuckovic, J. 2019; 25 (3)

  View details for DOI 10.1109/JSTQE.2019.2891402

  View details for Web of Science ID 000456927400001

• Vernier spectrometer using counterpropagating soliton microcombs SCIENCE Yang, Q., Shen, B., Wang, H., Minh Tran, Zhang, Z., Yang, K., Wu, L., Bao, C., Bowers, J., Yariv, A., Vahala, K. 2019; 363 (6430): 965-+

  View details for DOI 10.1126/science.aaw2317

  View details for Web of Science ID 000460194200042

• Inverse-designed diamond photonics. Nature communications Dory, C., Vercruysse, D., Yang, K. Y., Sapra, N. V., Rugar, A. E., Sun, S., Lukin, D. M., Piggott, A. Y., Zhang, J. L., Radulaski, M., Lagoudakis, K. G., Su, L., Vučković, J. 2019; 10 (1): 3309

  Abstract

  Diamond hosts optically active color centers with great promise in quantum computation, networking, and sensing. Realization of such applications is contingent upon the integration of color centers into photonic circuits. However, current diamond quantum optics experiments are restricted to single devices and few quantum emitters because fabrication constraints limit device functionalities, thus precluding color center integrated photonic circuits. In this work, we utilize inverse design methods to overcome constraints of cutting-edge diamond nanofabrication methods and fabricate compact and robust diamond devices with unique specifications. Our design method leverages advanced optimization techniques to search the full parameter space for fabricable device designs. We experimentally demonstrate inverse-designed photonic free-space interfaces as well as their scalable integration with two vastly different devices: classical photonic crystal cavities and inverse-designed waveguide-splitters. The multi-device integration capability and performance of our inverse-designed diamond platform represents a critical advancement toward integrated diamond quantum optical circuits.

  View details for DOI 10.1038/s41467-019-11343-1

  View details for PubMedID 31346175

• From Inverse Design to Implementation of Practical Photonics Skarda, J., Su, L., Yang, K., Vercruysse, D., Sapra, N. V., Vuckovic, J., IEEE IEEE. 2019

  View details for Web of Science ID 000524676400122