Soo-Ho Jo
Seoul National University
PiezoelectricityEnergy harvestingMetamaterialInertiaPhysicsTransfer matrixFault (power engineering)Finite element methodLamb wavesFault detection and isolationTransfer-matrix method (optics)VoltageAutomotive engineeringBand gapEnergy (signal processing)SolenoidMaterials scienceAcousticsSolenoid valveContext (language use)Normal modeComputer scienceMechanical waveOptoelectronicsBroadbandCrystalBandwidth (signal processing)
17Publications
6H-index
113Citations
Publications 18
Newest
#1Soo-Ho Jo (SNU: Seoul National University)H-Index: 6
#2Byeng D. Youn (SNU: Seoul National University)H-Index: 34
Abstract null null This paper aims to improve the existing electromechanically coupled analytical model that was developed for defect-induced phononic crystals (PnCs) designed for piezoelectric energy harvesting (PEH). The work outlined in this paper improves the model by considering lateral movements, which are not negligible when the slenderness ratio of the rods is small. Based on the Rayleigh-Love rod theory, the proposed method uses the generalized Hamilton's principle to derive two governi...
1 CitationsSource
#1Soo-Ho Jo (SNU: Seoul National University)H-Index: 6
#2Byeng D. Youn (SNU: Seoul National University)H-Index: 34
This paper proposes a one-dimensional, defect-introduced phononic crystal design for target frequency matching. A quarter-wave stack is used as a unit cell. The supercell-technique-based transfer m...
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Several previous studies have been dedicated to incorporating double defect modes of a phononic crystal (PnC) into piezoelectric energy harvesting (PEH) systems to broaden the bandwidth. However, these prior studies are limited to examining an identical configuration of the double defects. Therefore, this paper aims to propose a new design concept for PnCs that examines differently configured double defects for broadband elastic wave energy localization and harvesting. For example, a square-pill...
2 CitationsSource
#1Soo-Ho Jo (SNU: Seoul National University)H-Index: 6
#2Heonjun Yoon (Soongsil University)H-Index: 10
Last. Byeng D. Youn (SNU: Seoul National University)H-Index: 34
view all 4 authors...
Abstract Phononic crystal (PnC)-based piezoelectric energy harvesting (PEH) has been recently introduced to amplify the input energy fed into PEH devices. If a defect is imposed into a PnC, as a result, defect bands are created within the band gap. At a defect band frequency, elastic waves can be localized inside the defect. By attaching a PEH device to the defect, output electric power can be significantly enhanced. However, since the attachment of the PEH device leads to the shifting of the de...
7 CitationsSource
#1Soo-Ho JoH-Index: 6
#2Yiwei XiaH-Index: 6
Last. Byeng D. YounH-Index: 34
view all 7 authors...
Abstract One extraordinary phenomenon exhibited by phononic crystals (PnCs) is that they can manipulate oblique incident waves in a target direction via proper refraction, commonly called wave self-collimation. Although prior studies have demonstrated self-collimation of electromagnetic and acoustic waves, only a few studies have examined elastic waves in this context. If a PnC is designed to represent rectangular-like and/or parallel-line-like equi-frequency contour (EFCs), elastic waves can be...
4 CitationsSource
#1Yong Chang Shin (SNU: Seoul National University)H-Index: 4
#2Heonjun Yoon (Georgia Institute of Technology)H-Index: 10
Last. Byeng D. Youn (SNU: Seoul National University)H-Index: 34
view all 7 authors...
Abstract Extraordinary phenomenon (e.g., band gap) exhibited by a phononic crystal (PnC) has recently been incorporated into piezoelectric energy harvesting (PEH) as a means to amplify input waves for improving the power generation capability. For a systematic design of PnC-based PEH using band gap reflection, it is required to identify a standing wave pattern (i.e. location of nodes and antinodes) in order to determine the optimal placement of a piezoelectric layer. In this context, we propose ...
6 CitationsSource
#1Soo-Ho Jo (SNU: Seoul National University)H-Index: 6
#2Heonjun Yoon (Georgia Institute of Technology)H-Index: 10
Last. Byeng D. Youn (SNU: Seoul National University)H-Index: 34
view all 4 authors...
Abstract Several research efforts have been devoted to exploring defect modes of uniform phononic crystals (PnCs) with single or double defects. However, they have difficulties in achieving broadband energy localization under realistic environments. This study thus proposes a new design concept of a graded PnC with double defects for broadband energy localization. A graded PnC refers to a PnC built by varying one or more design variables of its lattices. The double defects are introduced to be s...
12 CitationsSource
#1Tae Gon Lee (KU: Korea University)H-Index: 11
#2Soo-Ho Jo (SNU: Seoul National University)H-Index: 6
Last. Miso Kim (KRISS: Korea Research Institute of Standards and Science)H-Index: 12
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Abstract A critical challenge in energy harvesting has been insufficient sustainable power generation for practical applications, despite the benefits of self-powering and green-enabling technology. Metamaterials are artificial structures capable of controlling and manipulating functionalities beyond the limit of natural materials. Various metamaterial concepts including phononic crystals (PnCs) and locally resonant metamaterials have proved to manipulate mechanical waves and enable amplificatio...
11 CitationsSource
#1Soo-Ho Jo (SNU: Seoul National University)H-Index: 6
#2Heonjun Yoon (Georgia Institute of Technology)
Last. Byeng D. Youn (SNU: Seoul National University)H-Index: 34
view all 7 authors...
Abstract Metamaterial-based energy harvesting (MBEH) has recently received much attention due to its capability of amplifying input mechanical wave transferred to a piezoelectric energy harvesting (PEH) device. A phononic crystal (PnC), one representative example of a metamaterial, is an artificially-engineered structure constituted by a periodic repetition of unit cells that can manipulate the propagation of elastic waves at the scale of the wavelength. If a defect is introduced in the PnC by r...
23 CitationsSource
#1Soo-Ho Jo (SNU: Seoul National University)H-Index: 6
#2Heonjun Yoon (Georgia Institute of Technology)H-Index: 10
Last. Byeng D. Youn (SNU: Seoul National University)H-Index: 34
view all 5 authors...
Phononic crystals (PnCs) have been utilized to amplify the amount of input energy transferred to a piezoelectric energy harvesting (PEH) device by manipulating elastic wave propagation. When introd...
17 CitationsSource