Time-reversed lasing based on one-dimensional gratings |
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| Authors: | Yun Shen Linfang Shen Zhenquan Lai Guoping Wang Xiaohua Deng |
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| Institution: | 1. Department of Physics, Nanchang University, Nanchang 330031, China;2. Institute of Space Science and Technology, Nanchang University, Nanchang 330031, China;3. Key Laboratory of Artificial Micro- and Nano- Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China |
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| Abstract: | We show that a one-dimensional grating can generally exhibit time-reversed lasing better than a uniform slab. As the effective refractive index of a grating can be controlled by adjusting the geometric parameters, the time-reversed lasing can be realized for any incident wavelength in it. Moreover, the operating frequency range of coherently perfect absorption for a grating structure is remarkably broad compared with a uniform structure. All these behaviors are demonstrated with GaAs/Air gratings illuminated around 794.8 nm. The properties of the proposed grating imply the potential applications such as detectors, transducers, and broad band absorber. |
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| Keywords: | Time-reversed lasing One-dimensional gratings Operating frequency range |
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