1.Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
2.Naval Research Laboratory, 4555 Overlook Ave. SW, Washington, DC 20375, USA
3.Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
4.Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, USA
Mikhail A. Kats (mkats@wisc.edu)
纸质出版日期:2019,
网络出版日期:2019-06-05,
收稿日期:2018-11-19,
修回日期:2019-05-01,
录用日期:2019-05-07
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Nanosecond mid-infrared pulse generation via modulated thermal emissivity[J]. LSA, 2019,8(5):726-733.
Beliu, G. & Sauer, M. A Trojan Horse for live-cell super-resolution microscopy. Light: Science & Applications, 8, 8-9 (2019).
Nanosecond mid-infrared pulse generation via modulated thermal emissivity[J]. LSA, 2019,8(5):726-733. DOI: 10.1038/s41377-019-0158-6.
Beliu, G. & Sauer, M. A Trojan Horse for live-cell super-resolution microscopy. Light: Science & Applications, 8, 8-9 (2019). DOI: 10.1038/s41377-019-0158-6.
We demonstrate the generation of nanosecond mid-infrared pulses via fast modulation of thermal emissivity enabled by the absorption of visible pump pulses in unpatterned silicon and gallium arsenide. The free-carrier dynamics in these materials result in nanosecond-scale modulation of thermal emissivity
which leads to nanosecond pulsed thermal emission. To our knowledge
the nanosecond thermal-emissivity modulation in this work is three orders of magnitude faster than what has been previously demonstrated. We also indirectly observed subnanosecond thermal pulses from hot carriers in semiconductors. The experiments are well described by our multiphysics model. Our method of converting visible pulses into the mid infrared using modulated emissivity obeys different scaling laws and can have significant wavelength tunability compared to approaches based on conventional nonlinearities.
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