Papers

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2020 Steven A. Cummer

Indirectly Measured Ambient Electric Fields for Lightning Initiation in Fast Breakdown Regions

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This paper is made freely available by the publisher.

Zhenhua Tian

, Chen Shen

, Junfei Li

, Eric Reit, Hunter Bachman, Joshua E. S. Socolar

, Steven A. Cummer

, Tony Jun Huang

Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals

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Xiaohui Zhu

, Junfei Li

, Chen Shen

, Xiuyuan Peng

, Ailing Song

, Longqiu Li, Steven A. Cummer

Non-reciprocal acoustic transmission via space-time modulated membranes

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2019 Yunjiao Pu

, Steven A. Cummer

Needles and Lightning Leader Dynamics Imaged with 100–200 MHz Broadband VHF Interferometry

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Ailing Song

, Junfei Li

, Xiuyuan Peng

, Chen Shen

, Xiaohui Zhu

, Tianning Chen

, Steven A. Cummer

Asymmetric Absorption in Acoustic Metamirror Based on Surface Impedance Engineering

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Alfred Bing‐Chih Chen

, Han Chen, Chia‐Wen Chuang, Steven A. Cummer

, Gaopeng Lu

, Hui‐Kuan Fang

, Han‐Tzong Su, Rue‐Ron Hsu

On negative Sprites and the Polarity Paradox

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Yunjiao Pu

, Steven A. Cummer

, Fanchao Lyu

, Michael Briggs, Bagrat Mailyan

, Matthew Stanbro

, Oliver Roberts

Low Frequency Radio Pulses Produced by Terrestrial Gamma‐Ray Flashes

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Nikhil Jrk Gerard, Huachen Cui, Chen Shen

, Yangbo Xie

, Steven Cummer

, Xiaoyu Zheng, Yun Jing

Fabrication and experimental demonstration of a hybrid resonant acoustic gradient index metasurface at 40 kHz

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Ailing Song

, Junfei Li

, Chen Shen

, Xiuyuan Peng

, Xiaohui Zhu

, Tianning Chen

, Steven A. Cummer

Broadband high-index prism for asymmetric acoustic transmission

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Zilong Qin

, Steven A. Cummer

, Mingli Chen

, Fanchao Lyu

, Ya‐ping Du

A Comparative Study of the Ray Theory Model With the Finite Difference Time Domain Model for Lightning Sferic Transmission in Earth‐Ionosphere Waveguide

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Fanchao Lyu

, Steven A. Cummer

, Zilong Qin

, Mingli Chen

Lightning Initiation Processes Imaged With Very High Frequency Broadband Interferometry

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Gaopeng Lu, Hongbo Zhang, Steven A. Cummer

, Yongping Wang, Fanchao Lyu, Michael Briggs, Shaolin Xiong, Alfred Chen

A comparative study on the lightning sferics associated with terrestrial gamma-ray flashes observed in Americas and Asia

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Ana Díaz-Rubio

, Junfei Li, Chen Shen

, Steven A. Cummer

, Sergei A. Tretyakov

Power flow–conformal metamirrors for engineering wave reflections

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Gaopeng Lu

, Bingkun Yu

, Steven A. Cummer

, Kang‐Ming Peng

, Alfred B. Chen, Fanchao Lyu

, Xianghui Xue

, Fei Liu

, Rue‐Ron Hsu, Han‐Tzong Su

On the Causative Strokes of Halos Observed by ISUAL in the Vicinity of North America

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Fanchao Lyu

, Steven A. Cummer

Energetic Radio Emissions and Possible Terrestrial Gamma‐Ray Flashes Associated With Downward Propagating Negative Leaders

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Gaopeng Lu, Yanfeng Fan, Hongbo Zhang, Rubin Jiang

, Mingyuan Liu, Xiushu Qie, Steven A. Cummer

, Congzheng Han, Kun Liu

Measurement of continuing charge transfer in rocket-triggered lightning with low-frequency magnetic sensor at close range

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Chen Shen

, Ana Díaz-Rubio, Junfei Li

, Steven A. Cummer

A surface impedance-based three-channel acoustic metasurface retroreflector

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Junfei Li, Chen Shen

, Ana Díaz-Rubio, Sergei A. Tretyakov, Steven A. Cummer

Systematic design and experimental demonstration of bianisotropic metasurfaces for scattering-free manipulation of acoustic wavefronts

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This paper was not found in any repository; the policy of its publisher is unknown or unclear.

Martino Marisaldi, Marcello Galli, Claudio Labanti, Riccardo Campana

, Nikolai Østgaard, David Sarria, Steven Cummer, Fanchao Liu, Fabio Fuschino, Alessandro Ursi

Implications for Terrestrial Gamma-ray Flashes spectrum, flux and fine time structure at source based on the high-energy events observed by AGILE

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