Chirality reveals symmetry breaking of the fundamental interaction of elementary particles. In condensed matter, for example, the chirality of electrons governs many unconventional transport phenomena such as the quantum Hall effect. Here we show that phonons can exhibit intrinsic chirality in monolayer tungsten diselenide... [Read More]
We demonstrate that it is possible to localize photons nonreciprocally in a moving photonic lattice made by spatiotemporally modulating the atomic response, where the dispersion acquires a spectral Doppler shift with respect to the probe direction. A static defect placed in such a moving lattice produces a spatial localization of light in the band gap with a shifting frequency that depends on the direction of incident field with respect to the moving lattice... [Read More]
There has recently been a surge of interest in the physics and applications of broadband ultraslow waves in nanoscale structures operating below the diffraction limit. They range from light waves or surface plasmons in nanoplasmonic devices to sound waves in acoustic-metamaterial waveguides, as well as fermions and phonon polaritons in graphene and van der Waals crystals and heterostructures... [Read More]
Monolayers of transition-metal dichalcogenides (TMDs) exhibit numerous crystal phases with distinct structures, symmetries and physical properties. Exploring the physics of transitions between these different structural phases in two dimensions may provide a means of switching material properties, with implications for potential applications... [Read More]
Quantitative understanding of the ultrafast energy transfer between fluorescent nanoemitters and the environment is essential in nanophotonics and optoelectronics and beneficial to many industrial applications. For nanoemitters like single or colloidal dye molecules or quantum dots, their fluorescence decay near a metallic substrate can be described by a noninteracting single-dipole picture.... [Read More]
Monolayer transition metal dichalcogenides (TMD) with confined 2D Wannier-Mott excitons are intriguing for the fundamental study of strong light-matter interactions and the exploration of exciton polaritons at high temperatures... [Read More]
Long-range acoustic communication is crucial to underwater applications such as collection of scientific data from benthic stations, ocean geology, and remote control of off-shore industrial activities. However, the transmission rate of acoustic communication is always limited by the narrow-frequency bandwidth of the acoustic waves because of the large attenuation for high-frequency sound in water... [Read More]
|H. Zhu, J. Yi, M.-Y. Li, J. Xiao, L. Zhang, C.-W. Yang, R. A. Kaindl, L.-J. Li, Y. Wang & X. Zhang, "Observation of chiral phonons." Science, 359, 2018.|
|H. Ramezani, P. K. Jha, Y. Wang & X. Zhang, "Nonreciprocal Localization of Photons." Physical Review Letters, 120, 2018.|
|A. Labno, C. Gladden, J. Kim, D. Lu, X. Yin, Y. Wang, Z. Liu & X. Zhang, "Three-dimensional nanoscale imaging by plasmonic Brownian microscopy." Nanophotonics, 7, 2017.|
|P. K. Jha, N. Shitrit, J. Kim, X. Ren, Y. Wang & X. Zhang, "Metasurface-Mediated Quantum Entanglement." ACS Photonics, AOP, 2017.|
|A. Ishikawa, S. Hara, T. Tanaka, X. Zhang & K. Tsuruta, "Robust plasmonic hot-spots in a metamaterial lattice for enhanced sensitivity of infrared molecular detection." APL, 111, 2017.|
Feb 2018: Our lab alumni Prof. Nicholas Fang has been promoted to full professor at MIT.
Nov 2017: Our lab alumni Prof. Xiaobo Yin has been elected as a Moore Inventor Fellow.
Jul 2017: Sui has been selected as 2017 Reaxys Prize Finalist.
Mar 2017: Mervin has won Berkeley's Ross Tucker Award.