Unidirectional Coherent Phonon Emission in an Optomechanic Nanobeam Containing Coupled Cavities

Single and Coupled Nanobeam Cavities

Parity-Time Symmetry Breaking in Coupled Nanobeam Cavities.

The concept of parity-time symmetry (PT symmetry) originates from the canonical quantum mechanics and has become a hot topic recently. As a versatile platform to investigate the intriguing concept, both theoretical and experimental works in optics have been implemented. In this paper, the PT symmetry breaking phenomenon is investigated in a coupled nanobeam cavity system. An exceptional point i...

Programmable photonic crystal nanobeam cavities.

We present dynamically reconfigurable photonic crystal nanobeam cavities, operating at ~1550 nm, that can be continuously and reversibly tuned over a 9.5 nm wavelength range. The devices are formed by two coupled nanobeam cavities, and the tuning is achieved by varying the lateral gap between the nanobeams. An electrostatic force, obtained by applying bias voltages directly to the nanobeams, is...

Dynamically Reconfigurable Photonic Crystal Nanobeam Cavities

Wavelength-scale, high Q-factor photonic crystal cavities [1, 2] have emerged as a platform of choice for on-chip manipulation of optical signals, with applications ranging from low-power optical signal processing [3] and cavity quantum electrodynamics [4, 5] to biochemical sensing. Many of these applications, however, are limited by the fabrication tolerances and the inability to precisely con...

Coherent Polariton Dynamics in Coupled Highly Dissipative Cavities

Yong-Chun Liu, Xingsheng Luan, Hao-Kun Li, Qihuang Gong, Chee Wei Wong, and Yun-Feng Xiao State Key Laboratory for Mesoscopic Physics and School of Physics, Peking University, Collaborative Innovation Center of Quantum Matter, Beijing 100871, People’s Republic of China Optical Nanostructures Laboratory, Columbia University, New York, New York 10027, USA (Received 5 March 2014; published 30 May ...