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2014
Walker, E., D. Reyes, M. M. Rojas, A. Krokhin, and A. Neogi. "Funneled focusing of planar acoustic waves utilizing the metamaterial properties of an acoustic lens." In Photonic and Phononic Properties of Engineered Nanostructures IV, vol. 8994, p. 89940H. International Society for Optics and Photonics, 2014.
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8994/89940H/Funneled-focusing-of-planar-acoustic-waves-utilizing-the-metamaterial-properties/10.1117/12.2041051.full
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Walker, Ezekiel, Delfino Reyes, Miguel Mayorga Rojas, Arkadii Krokhin, Zhiming Wang, and Arup Neogi. "Tunable ultrasonic phononic crystal controlled by infrared radiation." Applied Physics Letters 105, no. 14 (2014): 143503. https://aip.scitation.org/doi/abs/10.1063/1.4894489
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Walker, Ezekiel, Delfino Reyes, Arkadii Krokhin, and Arup Neogi. "Anomalous temperature dependence of speed of sound of bulk poly (N-isopropylacrylamide) hydrogels near the phase transition." Ultrasonics 54, no. 5 (2014): 1337-1340. https://www.sciencedirect.com/science/article/pii/S0041624X14000158.
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