Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Song, Alex"'
Autor:
Lin, Jadon Y., de Sterke, C. Martijn, Wheatland, Michael S., Song, Alex Y., Kuhlmey, Boris T.
Lightsails are a promising spacecraft concept that can reach relativistic speeds via propulsion by laser light, allowing travel to nearby stars within a human lifetime. The success of a lightsail mission requires that any motion in the plane transver
Externí odkaz:
http://arxiv.org/abs/2408.14486
Autor:
Song, Alex Y., Kalapala, Akhil Raj Kumar, Gibson, Ricky, Reilly, Kevin James, Rotter, Thomas, Addamane, Sadhvikas, Wang, Haiwen, Guo, Cheng, Balakrishnan, Ganesh, Bedford, Robert, Zhou, Weidong, Fan, Shanhui
We show that by using a perturbed photonic Dirac-cone, one can realize ultra-narrow and finite Q-factor peak in the wavevector space, with both the peak value and the width separately tunable. We also discuss a lower bound in the minimal viable width
Externí odkaz:
http://arxiv.org/abs/2104.09818
Autor:
Minkov, Momchil, Williamson, Ian A. D., Andreani, Lucio C., Gerace, Dario, Lou, Beicheng, Song, Alex Y., Hughes, Tyler W., Fan, Shanhui
Publikováno v:
ACS Photonics, 7, 7, 1729-1741 (2020)
Gradient-based inverse design in photonics has already achieved remarkable results in designing small-footprint, high-performance optical devices. The adjoint variable method, which allows for the efficient computation of gradients, has played a majo
Externí odkaz:
http://arxiv.org/abs/2003.00379
Autor:
Williamson, Ian A. D., Minkov, Momchil, Dutt, Avik, Wang, Jiahui, Song, Alex Y., Fan, Shanhui
Publikováno v:
Proceedings of the IEEE, vol. 108, no. 10, pp. 1759-1784, Oct. 2020
Nonreciprocal components, such as isolators and circulators, are crucial components for photonic systems. In this article we review theoretical and experimental progress towards developing nonreciprocal photonic devices based on dynamic modulation. I
Externí odkaz:
http://arxiv.org/abs/2002.04754
Publikováno v:
Phys. Rev. Lett. 124, 257403 (2020)
We introduce a class of non-Hermitian systems that break electromagnetic reciprocity while preserving time-reversal symmetry, and describe its novel polarization dynamics. We show that this class of systems can be realized using van der Waals heteros
Externí odkaz:
http://arxiv.org/abs/2002.00341
Autor:
Song, Alex Y., Sun, Xiao-Qi, Dutt, Avik, Minkov, Momchil, Wojcik, Casey, Wang, Haiwen, Williamson, Ian, Orenstein, Meir, Fan, Shanhui
Publikováno v:
Phys. Rev. Lett. 125, 033603 (2020)
We demonstrate a non-Hermitian topological effect that is characterized by having complex eigenvalues only in the edge states of a topological material, despite the fact that the material is completely uniform. Such an effect can be constructed in an
Externí odkaz:
http://arxiv.org/abs/1910.10946
Autor:
Buddhiraju, Siddharth, Shi, Yu, Song, Alex, Wojcik, Casey, Minkov, Momchil, Williamson, Ian A. D., Dutt, Avik, Fan, Shanhui
In the presence of an external magnetic field, the surface plasmon polariton that exists at the metal-dielectric interface is believed to support a unidirectional frequency range near the surface plasmon frequency, where the surface plasmon polariton
Externí odkaz:
http://arxiv.org/abs/1809.05100
Publikováno v:
Appl. Phys. Lett. 113, 041106 (2018)
We show that the threshold of a photonic crystal surface-emitting laser can be calculated from first-principles by the method of rigorous coupled wave analysis (RCWA), which has been widely used to simulate the response spectra of passive periodic st
Externí odkaz:
http://arxiv.org/abs/1806.07997
Publikováno v:
Phys. Rev. A 99, 013824 (2019)
We show that a dynamic gain-loss modulation in an optical structure can lead to a direction-dependent parity-time (PT) phase transition. The phase transition can be made thresholdless in the forward direction, and yet remains with a non-zero threshol
Externí odkaz:
http://arxiv.org/abs/1806.00544
Publikováno v:
International Ophthalmology Clinics; Winter2025, Vol. 65 Issue 1, p47-52, 6p
