H. Baek Research Group
@ Sogang Univ.
[2024]
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S. Feng, A. J. Campbell, M. Brotons-Gisbert, D. Andrés-Penares, H. Baek, T. Taniguchi, K. Watanabe, B. Urbaszek, I. C. Gerber, and B.D. Gerardot, “Highly tunable ground and excited state excitonic dipoles in multilayer 2H-MoSe2”, Nature Communications 15, 4377 (2024)
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A. Campbell, V. Vitale, M. Brotons-Gisbert, H. Baek, A. Borel, T. Ivanova, T. Taniguchi, K. Watanabe, J. Lischner, and B. D. Gerardot, "The interplay of field-tunable strongly correlated states in a multi-orbital moiré system", Nature Physics, 20, 589 (2024)
[2023]
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H. Oh, Y. J. Hong, G.-C. Yi, H. Baek, D. R. Lee, H. H. Lee, “Initial Growth Behavior in Catalyst-Free-Grown Vertical ZnO Nanorods on c-Al2O3, as Observed Using Synchrotron Radiation X-ray Scattering”, Crystal Growth & Design 23, 1434 (2023)
[2022]
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A. Campbell, M. Brotons-Gisbert, H. Baek, V. Vitale, T. Taniguchi, K. Watanabe, J. Lischner, and B. D. Gerardot, “Exciton-polarons in the presence of strongly correlated electronic states in a MoSe2/WSe2 moiré superlattice”, npj 2D Materials and Applications 6, 79 (2022)
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H. Y. Hwang, H. Baek, G.-C. Yi, and Y. D. Jho, “Nanoscale mapping of surface strain in tapered nanorods using confocal photoluminescence spectroscopy”, Nanotechnology 33, 485703 (2022)
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Y. Lee, H. Jo, K. Kim, H. Yoo, H. Baek, D. R. Lee, and H. Oh, “IGZO synaptic thin-film transistors with embedded AlOx charge-trapping layers”, Applied Physics Express 15, 6 (2022)
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C. H. Park, M. K. Woo, B. K. Park, Y.-S. Kim, H. Baek, S.-W. Lee, H.-T. Lim, S.-W. Jeon, H. Jung, S. Kim, and S.-W. Han, “2× N twin-field quantum key distribution network configuration based on polarization, wavelength, and time division multiplexing”, NPJ Quantum Information 8, 48 (2022)
[2021]
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H. Baek, M. Brotons-Gisbert, A. Campbell, Valerio Vitale, Johannes Lischner, K. Watanabe, T. Taniguchi, and B. D. Gerardot, “Optical read-out of Coulomb staircases in a moiré superlattice via trapped interlayer trions”, Nature Nanotechnology, 16, 1237 (2021)
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J.-P. So, H.-R. Kim, H. Baek, K.-Y. Jeong, H.-C. Lee, W. Huh, Y. S. Kim, K. Watanabe, T. Taniguchi, J. Kim, C.-H. Lee, H.-G. Park, “Electrically driven strain-induced deterministic single-photon emitters in a van der Waals heterostructure”, Science Advances, eabj3176 (2021)
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M. Brotons-Gisbert, H. Baek, A. Campbell, K. Watanabe, T. Taniguchi, and B. D. Gerardot, “Moiré-trapped interlayer trions in a charge-tunable WSe2/MoSe2 heterobilayer”, Physical Review X 11, 031033 (2021)
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J. B. Park, M. S. Song, R. Ghosh, R. K. Saroj, Y. Hwang, Y. Tchoe, H. Oh, H. Baek, Y. Lim, B. Kim, S.-W. Kim, and G.-C. Yi, “Highly sensitive and flexible pressure sensors using position-and dimension-controlled ZnO nanotube arrays grown on graphene films”, NPG Asia Materials 13, 57 (2021)
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Y. Tchoe, J. Jo, H. Kim, H. Kim, H. Baek, K. Lee, D. Yoo, W. J. Choi, M. Kim, and G.-C. Yi, “Vertical monolithic integration of wide-and narrow-bandgap semiconductor nanostructures on graphene films”, NPG Asia Materials 13, 33 (2021)
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M. S. Song, H. Baek, K. Lee, D. Yoo, K. Chung, J. Lee, H. Moon, B. H. Lee, H. Y. Park, and G.-C. Yi, “Intracellular gallium nitride microrod laser”, NPG Asia Materials 13, 32 (2021)
[2020]
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Y. Tchoe, M. Song, H. Kim, H. Baek, J. Y. Park, H. Oh, K. Lee, K. Chung, J. K. Hyun, and G.-C. Yi “Individually addressable, high-density vertical nanotube Schottky diode crossbar array”, Nano Energy 16, 104995 (2020)
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H. Baek*, M. Brotons-Gisbert*, Z. X. Koong, A. Campbell, M. Rambach, K. Watanabe, T. Taniguchi, and B. D. Gerardot, “Highly energy-tunable quantum light from moiré trapped excitons”, Science Advances 6, eaba8526 (2020) (*equal contribution)
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M. Brotons-Gisbert*, H. Baek*, A. Molina-Sánchez, A. Campbell, D. Scerri, D. White, K. Watanabe, T. Taniguchi, C. Bonato, and B. D. Gerardot, “Spin-layer locking of interlayer excitons trapped in moiré potentials”, Nature Materials 19, 630 (2020) (*equal contribution)
[2010 - 2017]
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H. Baek, H. Kwak, M. S. Song, G. E. Ha, J. Park, Y. Tchoe, J. K. Hyun, H. Y. Park, E. Cheong, and G.-C. Yi, “ZnO nanotube waveguide arrays on graphene films for local optical excitation on biological cells”, APL Materials 5, 046106 (2017)
- Selected as an editor’s pick in APL Materials. -
H. Baek, J. B. Park, J. Park, J. K. Hyun, H. Yoon, H. Oh, and J. Yoon, “ZnO nanolasers on graphene films”, Applied Physics Letters 108, 263102 (2016)
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K. Chung, H. Yoo, J. K. Hyun, H. Oh. Y. Tchoe, K. Lee, H. Baek, M. Kim, and G-C. Yi, “Flexible GaN light-emitting diodes using GaN microdisk epitaxial laterally overgrown on graphene dots”, Advanced Materials 28, 7688 (2016)
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K. Lee, Y. Tchoe, H. Yoon, H. Baek, K. Chung, S. Lee, C. Yoon, B. H. Park, and G.-C. Yi, “Real-time device-scale imaging of conducting filament dynamics in resistive switching materials”, Scientific Reports 6, 27451 (2016)
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H.-Y. Hwang, H. Baek, G.-C. Yi, H.-C. Kim, and Y.-D. Jho, “Distinctive mapping of strain and quantum size effects using depth-resolved photoluminescence in ZnO nanoneedles”, AIP Advances 6, 045021 (2016).
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Y. Tchoe, C.-H. Lee, J. B. Park, H. Baek, K. Chung, J. Jo, M. Kim, and G.-C. Yi, "Microtube Light-Emitting Diode Arrays with Metal Cores”, ACS Nano 10, 3114 (2016)
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J. K. Hyun, T. Kang, H. Baek, H. Oh, D.-S. Kim, and G.-C Yi, “Enhanced second harmonic generation by coupling to exciton ensembles in Ag-coated ZnO nanorods”, ACS Photonics 2, 1314 (2015)
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J. K. Hyun, T. Kang, H. Baek, D.-S. Kim, and G.-C Yi, “Nanoscale Single-Element Color Filters”, Nano Letters 15, 5938 (2015)
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S. I. Park, Y. Tchoe, H. Baek, J. Heo, J. K. Hyun, J. Jo, M. Kim, N.-J. Kim, and G.-C. Yi, “Growth and optical characteristics of high-quality ZnO thin films on graphene layers”, APL Materials 3, 016103 (2015)
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H. Oh, Y. J. Hong, K.-S. Kim, S. Yoon, H. Baek, S.-H. Kang, Y.-K. Kwon, M. Kim, and G.-C. Yi, “Architectured van der Waals epitaxy of ZnO nanostructures on hexagonal BN”, NPG Asia Materials 6, e145 (2014)
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H. Baek, J. K Hyun, K. Chung, H. Oh, and G.-C. Yi, “Selective excitation of Fabry-Perot or whispering-gallery mode-type lasing in GaN microrods”, Applied Physics Letters 105, 201108 (2014)
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J. Xu, C. Wang, A. Lu, B. Wu, X. Chen, H. Oh, H. Baek, G.-C. Yi, and L. Ouyang, “Photoluminescence of excitons and defects in ZnSe-based longitudinal twinning nanowires”, Journal of Physics D: Applied Physics 47, 485302 (2014)
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J. Xu, C. Wang, B. Wu, X. Xu, X. Chen, H. Oh, H. Baek, and G.-C. Yi, “Twinning effect on photoluminescence spectra of ZnSe nanowires”, Journal of Applied Physics 116, 174303 (2014)
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K. Chung, H. Beak, Y. Tchoe, H. Oh, H. Yoo, M. Kim, and G.-C. Yi, “Growth and characterizations of GaN micro-rods on graphene films for flexible light emitting diodes”, APL Materials 2, 092521 (2014)
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D. M. Kim, Y.-H. Cho, H. Jeong, H. Baek, G.-C. Yi, and Y. D. Jho, “Stimulated Emission Features of Bound Excitons in ZnO Nanotubes”, Journal of Nanoscience and Nanotechnology 14, 5293, (2014)
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J. Xu, A. Lu, C. Wang, R. Zou, X. Liu, X. Wu, Y. Wang, S. Li, L. Sun, X. Chen, H. Oh, H. Baek, G.‐C. Yi, and J. Chu, “ZnSe‐based longitudinal twinning nanowires”, Advanced Engineering Materials 16, 459 (2014)
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H. Baek, C.-H. Lee, K. Chung, and G.-C. Yi, “Epitaxial GaN Microdisk Lasers Grown on Graphene Microdots”, Nano Letters 13, 2782 (2013).
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K. Chung, S. I. Park, H. Baek, J.-S. Chung, and G.-C. Yi, “High-quality GaN films grown on chemical vapor-deposited graphene films”, NPG Asia Materials 4, e24 (2012)
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Y.-J. Kim, H. Yoo, C.-H. Lee, J. B. Park, H. Baek, M. Kim, and G.-C. Yi, “Position- and Morphology-Controlled ZnO Nanostructures Grown on Graphene Layers”, Advanced Materials 24, 5565 (2012)
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H. Heo, K. Kang, D. Lee, L.-H. Jin, H. Baek, I. Hwang, M. Kim, H.-S. Lee, B.-J. Lee, G.-C. Yi, Y.-H. Cho, and M.-H. Jo, “Tunable Catalytic Alloying Eliminates Stacking Faults in Compound Semiconductor Nanowires”, Nano Letters 12, 855 (2012)
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C.-H. Lee, Y. J. Hong, Y.-J. Kim, J. Yoo, H. Baek, S.-R. Jeon, S.-J. Le, and G.-C. Yi “GaN/ZnO Nanotube Heterostructure Light-Emitting Diodes Fabricated on Si”, IEEE Journal of Selected Topics in Quantum Electronics 17, 966 (2010)