73. Spontaneous Emission Decay and Excitation in Photonic Time Crystals
Jagang Park, Kyungmin Lee, Ruo-Yang Zhang, Hee-Chul Park, Jung-Wan Ryu, Gil Young Cho, Min Yeul Lee, Zhaoqing Zhang, Namkyoo Park, Wonju Jeon, Jonghwa Shin, C. T. Chan, and Bumki Min
Phys. Rev. Lett. 135, 133801 (2025)
72. Robust exceptional point chains and chirality switch in a vast optical parameter space
Chang-Hwan Yi, Jung-Wan Ryu, Tom Simon Rodemund, and Martina Hentschel
Phys. Rev. A 112, L031501 (2025)
71. Nonreciprocity induced spatiotemporal chaos: Reactive vs dissipative routes
Jung-Wan Ryu
arXiv:2509.20992
70. A unified framework for exceptional point pairs in non-Hermitian two-level systems
Jung-Wan Ryu, Jae-Ho Han, Chang-Hwan Yi
arXiv:2509.09129
69. Non-orientable Exceptional Points in Twisted Boundary Systems
Jung-Wan Ryu, Jae-Ho Han, Moon Jip Park, Hee Chul Park, Chang-Hwan Yi
arXiv:2504.11983
68. Decay rates of optical modes unveiling the island structures in mixed phase space
Chang-Hwan Yi, Barbara Dietz, Jae-Ho Han, and Jung-Wan Ryu
Phys. Rev. A 111, 033509 (2025); arXiv:2502.07407
67. Complex energy structures of exceptional point pairs in two level systems
Jung-Wan Ryu, Chang-Hwan Yi, and Jae-Ho Han
Europhysics Letters 150, 45001 (2025); arXiv:2412.17450
66. Realization of geometric phase topology induced by multiple exceptional points
Jung-Wan Ryu, Jae-Ho Han, and Chang-Hwan Yi
Phys. Rev. A 110, 052221 (2024); arXiv:2408.16302
65. Engineering high Chern number insulators
Sungjong Woo, Seungbum Woo, Jung-Wan Ryu, and Hee Chul Park
Journal of the Korean Physical Society 85, 661–669 (2024); arXiv:2407.16225
64. Pseudo-Hermitian Topology of Multiband Non-Hermitian Systems
Jung-Wan Ryu, Jae-Ho Han, Chang-Hwan Yi, Hee Chul Park, and Moon Jip Park
Phys. Rev. A 111, 042205 (2025); arXiv: 2405.17749
63. Spontaneous emission decay and excitation in photonic temporal crystals
Jagang Park, Kyungmin Lee, Ruo-Yang Zhang, Hee-Chul Park, Jung-Wan Ryu, Gil Young Cho, Min Yeul Lee, Zhaoqing Zhang, Namkyoo Park, Wonju Jeon, Jonghwa Shin, C. T. Chan, Bumki Min
62. Exceptional Classifications of Non-Hermitian Systems
Jung-Wan Ryu, Jae-Ho Han, Chang-Hwan Yi, Moon Jip Park, and Hee Chul Park
Communications Physics 7, 109 (2024); arXiv:2306.06967
61. Realization of non-Hermitian Hopf bundle matter
Yung Kim, Hee Chul Park, Minwook Kyung, Kyungmin Lee, Jung-Wan Ryu, Oubo You, Shuang Zhang, Bumki Min, and Moon Jip Park
Communications Physics 6, 273 (2023); arXiv:2303.13721
60. Orthogonal flatbands in Hamiltonians with local symmetry
Jung-Wan Ryu, Alexei Andreanov, Hee Chul Park, and Jae-Ho Han
J. Phys. A: Math. Theor. 57, 495301 (2024); arXiv:2308.14997
59. Dynamics in non-Hermitian systems with nonreciprocal coupling
Jung-Wan Ryu
Phys. Rev. A 108, 052205 (2023); arXiv:2307.12021
58. Revealing non-Hermitian band structure of photonic Floquet media
Jagang Park, Hyukjoon Cho, Seojoo Lee, Kyungmin Lee, Kanghee Lee, Hee Chul Park, Jung-Wan Ryu, Namkyoo Park, Sanggeun Jeon, Bumki Min
Science Advances 8 (40), eabo6220 (2022); arXiv:2112.01313
57. Classification of multiple arbitrary-order non-Hermitian singularities
Jung-Wan Ryu, Jae-Ho Han, Chang-Hwan Yi
Phys. Rev. A 106, 012218 (2022); arXiv:2112.02547
56. Mesoscopic Möbius ladder lattices as non-Hermitian model systems
Jung-Wan Ryu and Martina Hentschel
Journal of Physics A: Mathematical and Theoretical, 55 224008 (2022); arXiv:2205.01641
55. Impact of non-Hermitian Mode interaction on Inter-cavity Light transfer
Hyeon-Hye Yu, Sunjae Gwak, Jinhyeok Ryu, Ji-Hwan Kim, Jung-Wan Ryu, Chil-Min Kim, Chang-Hwan Yi
Photon. Res. 10(5), 1232-1237 (2022); arXiv:2105.10936
54. Double layered transformation cavities: Crossover between local and global transformations
Jung-Wan Ryu
Phys. Rev. A 105, 033523 (2022); arXiv:2112.08661
53. Topological edge states in bowtie ladders with different cutting edges
Jung-Wan Ryu, Sungjong Woo, Nojoon Myoung, and Hee Chul Park
Physica E: Low-dimensional Systems and Nanostructures 137, 114941 (2022); arXiv:2012.00270
52. Stochastic thermodynamics of inertial-like Stuart–Landau dimer
Jung-Wan Ryu, Alexandre Lazarescu, Rahul Marathe, Juzar Thingna
New Journal of Physics 23, 105005 (2021); arXiv:2107.00208
51. Salient role of the non-Hermitian coupling for optimizing conditions in multiple maximizations of inter-cavity light transfer
Hyeon-Hye Yu, Sunjae Gwak, Hyundong Kim, Jung-Wan Ryu, Chil-Min Kim, Chang-Hwan Yi
Optics Express 29, 19998 (2021)
50. Transformation cavities with a narrow refractive index profile
Jung-Wan Ryu and Jinhang Cho
Opt. Lett. 46, 1900 (2021); arXiv:2102.09516
49. Non-orientability induced PT phase transition in Moebius ladder lattices
Jung-Wan Ryu, Nojoon Myoung, Martina Hentschel, and Hee Chul Park
Phys. Rev. A 103, 042207 (2021); arXiv:2001.10221
48. Whispering gallery modes in triple microdisks of triangular configurations
Jung-Wan Ryu and Sunghwan Rim
J. Opt. Soc. Am. B 37, 2382-2387 (2020); arXiv:1910.13660
47. Emergent localized states at the interface of a twofold PT-symmetric lattice
Jung-Wan Ryu, Nojoon Myoung, Ara Go, Sungjong Woo, Sang-Jun Choi, and Hee Chul Park
Phys. Rev. Research 2, 033149 (2020); arXiv:1904.00444
46. Boundary integral equation method for resonances in gradient index cavities designed by conformal transformation optics
Jung-Wan Ryu, Jinhang Cho, Soo-Young Lee, Yushin Kim, Sang-Jun Park, Sunghwan Rim, Muhan Choi, and Inbo Kim
Scientific Reports 9, 19684 (2019); arXiv:1909.11582
45. Oscillation death in coupled counter-rotating identical nonlinear oscillators
Jung-Wan Ryu, Woo-Sik Son, and Dong-Uk Hwang
Phys. Rev. E 100, 022209 (2019); arXiv:1904.07450
44. Splitting of conductance resonance through a magnetic quantum dot in graphene
Nojoon Myoung, Jung-Wan Ryu, Hee Chul Park, Seung Joo Lee, and Sungjong Woo
Phys. Rev. B 100, 045427 (2019); arXiv:1811.00750
43. Optimization of conformal Whispering Gallery Modes in limacon-shaped transformation cavities
Jung-Wan Ryu, Jinhang Cho, Inbo Kim, and Muhan Choi
Scientific Reports 9, 8506 (2019); arXiv:1901.03083
42. Statistical properties of chaotic microcavities in small and large opening cases
Jung-Wan Ryu and Sang Wook Kim
Chaos 29, 043123 (2019); arXiv:1305.6698
41. Flat-band localization and self-collimation of light in photonic crystals
Nojoon Myoung, Hee Chul Park, A Ramachandran, E Lidorikis, and Jung-Wan Ryu
Scientific Reports 9, 2862 (2019); arXiv:1801.08671
40. Husimi functions at gradient index cavities designed by conformal transformation optics
Inbo Kim, Jinhang Cho, Yushin Kim, Bumki Min, Jung-Wan Ryu, Sunghwan Rim, and Muhan Choi
Optics Express 26, 6851 (2018).
39. Quantum Transport and Non-Hermiticity on Flat-Band Lattices
Hee Chul Park, Jung-Wan Ryu, and Nojoon Myoung
J Low Temp Phys 191, 49 (2018).
38. Antiresonance induced by symmetry-broken contacts in quasi-one-dimensional lattices
Jung-Wan Ryu, Nojoon Myoung, and Hee Chul Park
Phys. Rev. B 96, 125421 (2017); arXiv:1709.00130
37. Amplitude death in a ring of nonidentical nonlinear oscillators with unidirectional coupling
Jung-Wan Ryu, Jong-Ho Kim, Woo-Sik Son, and Dong-Uk Hwang
Chaos 27, 083119 (2017); arXiv:1708.04736
36. Reconfiguration of quantum states in PT-symmetric quasi-one dimensional lattices
Jung-Wan Ryu, Nojoon Myoung, and Hee Chul Park
Scientific Reports 7, 8746 (2017); arXiv:1708.00131
35. Designing whispering gallery modes via transformation optics
Yushin Kim*, Soo-Young Lee*, Jung-Wan Ryu*, Inbo Kim, Jae-Hyung Han, Heung-Sik Tae, Muhan Choi, and Bumki Min
Nature Photonics 10, 647 (2016). (*Equally contributed)
34. Localization in chaotic systems with a single-channel opening
D. Lippolis, J.-W. Ryu, and S. W. Kim
Phys. Rev. E 92, 012921 (2015).
33. Rotationally reconfigurable metamaterials based on moiré phenomenon
J.-H. Han, I. Kim, J.-W. Ryu, J. Kim, J.-H. Cho, G.-S. Yim, H.-S. Park, B. Min, and M. Choi
Optics Express 23, 17443 (2015).
32. Exceptional points in coupled dissipative dynamical systems
J.-W. Ryu, W.-S. Son, D.-U. Hwang, S.-Y. Lee, and S. W. Kim
Phys. Rev. E 91, 052910 (2015).
31. Abnormal high-Q modes of coupled stadium-shaped microcavities
J.-W. Ryu, S.-Y. Lee, I. Kim, M. Choi, M. Hentschel, and S. W. Kim
Opt. Lett. 39, 4196 (2014).
30. Phase-space analysis of lasing modes in a chaotic microcavity
T.-Y. Kwon, S.-Y. Lee, J.-W. Ryu, and M. Hentschel
Phys. Rev. A 88, 023855 (2013).
29. On-manifold localization in open quantum maps
D. Lippolis, J.-W. Ryu, S.-Y. Lee, and S. W. Kim
Phys. Rev. E 86, 066213 (2012).
28. Terahertz beat frequency generation from two-mode lasing operation of coupled microdisk laser
J.-W. Ryu, J. Cho, C.-M. Kim, S. Shinohara, and S. W. Kim
Opt. Lett. 37, 3210 (2012).
27. Geometric phase around multiple exceptional points
S.-Y. Lee, J.-W. Ryu, S. W. Kim, and Y. C. Chung
Phys. Rev. A 85, 064103 (2012).
26. Quasiattractors in coupled maps and coupled dielectric cavities
J.-W. Ryu, M. Hentschel, and S. W. Kim
Phys. Rev. E 85, 056213 (2012).
25. Analysis of multiple exceptional points related to three interacting eigenmodes in a non-Hermitian Hamiltonian
J.-W. Ryu, S.-Y. Lee, and S. W. Kim
Phys. Rev. A 85, 042101 (2012).
24. Nonorthogonal pairs of copropagating optical modes in deformed microdisk cavities
J. Wiersig, A. Eberspaecher, J.-B. Shim, J.-W. Ryu, S. Shinohara, M. Hentschel, and H. Schomerus
Phys. Rev. A 84, 023845 (2011).
23. Designing coupled microcavity lasers for high-Q modes with unidirectional light emission
J.-W. Ryu and M. Hentschel
Opt. Lett. 36, 1116 (2011).
22. Quasiscarred modes and their branching behavior at an exceptional point
J.-W. Ryu and S.-Y. Lee
Phys. Rev. E 83, 015203(R) (2011).
21. Ray model and ray-wave correspondence in coupled optical microdisks
J.-W. Ryu and M. Hentschel
Phys. Rev. A 82, 033824 (2010).
20. Oscillation Quenching in Coupled Different Oscillators
J.-W. Ryu, D.-S. Lee, Y.-J. Park, and C.-M. Kim
J. Korean. Phys. Soc. 55, 395 (2009).
19. Coupled nonidentical microdisks: Avoided crossing of energy levels and unidirectional far-field emission
J.-W. Ryu, S.-Y. Lee, and S.W. Kim
Phys. Rev. A 79, 053858 (2009).
18. Quantum Localization in Open Chaotic Systems
J.-W. Ryu, G. Hur, and S.W. Kim
Phys. Rev. E 78, 037201 (2008).
17. Divergent Petermann factor of interacting resonances in a stadium-shaped microcavity
S.-Y. Lee, J.-W. Ryu, J.-B. Shim, S.-B. Lee, S.W. Kim, and K. An.
Phys. Rev. A 78, 015805 (2008).
16. Transport Control in a Deterministic Ratchet System
W.-S. Son, J.-W. Ryu, D.-U. Hwang, S.-Y. Lee, Y.-J. Park, and C.-M. Kim
Phys. Rev. E 77, 066213 (2008).
15. Ray and Wave Dynamical Properties of a Spiral-shaped Dielectric Microcavity
S.-Y. Lee, S. Rim, J.-W. Ryu, T.-Y. Kwon, M. Choi, and C.-M. Kim
J. Phys. A: Math. Theor. 41, 275102 (2008).
14. Resonances in a Circular Dielectric Cavity
J.-W. Ryu, S. Rim, Y.-J. Park, C.-M. Kim, and S.-Y. Lee
Phys. Lett. A 372, 3531 (2008).
13. Characteristics of Lasing Modes in a Spiral-shaped Microcavity
C.-M. Kim, S.-Y. Lee, J.-W. Ryu, T.-Y. Kwon, S. Rim, J. Lee, and J. Cho
Prog. Theor. Phys. Supp. 166, 112 (2007).
12. Control of a Deterministic Inertia Ratchet System via Extended Delay Feedback
W.-S. Son, Y.-J. Park, J.-W. Ryu, D.-U. Hwang, and C.-M. Kim
J. Korean. Phys. Soc. 50, 243 (2007).
11. Directional Interacting Whispering Gallery Modes in Coupled Dielectric Microdisks
J.-W. Ryu, S.-Y. Lee, C.-M. Kim, and Y.-J. Park
Phys. Rev. A 74, 013804 (2006).
10. Survival Probability Time Distribution in Dielectric Cavities
J.-W. Ryu, S.-Y. Lee, C.-M. Kim, and Y.-J. Park
Phys. Rev. E 73, 036207 (2006).
9. Scarred Resonances and Steady Probability Distribution in a Chaotic Microcavity
S.-Y. Lee, J.-W. Ryu, T.-Y. Kwon, S. Rim, and C.-M. Kim
Phys. Rev. A 72, 061801(R) (2005).
8. Excitable Behavior of an Operational Amplifier
C.-M. Kim, G.-S. Yim, J.-W. Ryu, Y.-J. Park, and D.-U. Hwang
Europhysics Letters, 71, 723 (2005).
7. Stabilization of a Chaotic Laser and Quenching
D.-S. Lee, J.-W. Ryu, Y.-J. Park, W.-H. Kye, M. S. Kurdoglyan, and C.-M. Kim
Appl. Phys. Lett. 86, 181104 (2005).
6. Quasiscarred Resonances in a Spiral-Shaped Microcavity
S.-Y. Lee, S. Rim, J.-W. Ryu, T.-Y. Kwon, M. Choi, and C.-M. Kim
Phys. Rev. Lett. 93, 164102 (2004).
5. Effects of Time-delayed Feedback on Chaotic Oscillators
J.-W. Ryu, W.-H. Kye, S.-Y. Lee, M.-W. Kim, M. Choi, S. Rim, Y.-J. Park, and C.-M. Kim
Phys. Rev. E 70, 036220 (2004).
4. Chaotic Behaviors of Operational Amplifiers
G.-S. Yim, J.-W. Ryu, Y.-J. Park, S. Rim, S.-Y. Lee, W.-H. Kye, and C.-M. Kim
Phys. Rev. E 69, 045201 (2004).
3. Anti-synchronization of Chaotic Oscillators
C.-M. Kim, S. Rim, W.-H. Kye, J.-W. Ryu, and Y.-J. Park
Phys. Lett. A 320, 39 (2003).
2. Experimental Observation of Characteristic Relations of Type-III Intermittency in the Presence of Noise in a Simple Electronic Circuit
W.-H. Kye, S. Rim, C.-M. Kim, J.-H. Lee, J.-W. Ryu, B.-S. Yeom, and Y.-J. Park
Phys. Rev. E 68, 036203 (2003).
1. Characteristic Relations of Type-III Intermittency in an Electronic Circuit
C.-M. Kim, G.-S. Yim, J.-W. Ryu, and Y.-J. Park
Phys. Rev. Lett. 80, 5317 (1998).