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arxiv: 2606.05064 · v1 · pith:GP7K654Bnew · submitted 2026-06-03 · ⚛️ physics.optics

Multi-dimensional parameter space of higher-order exceptional points induced by Brillouin optoacoustics

Grigorii Slinkov , Anton Montag , Julius T. Gohsrich , Quentin Levoy , Paulina Fuentes Rivera , Flore K. Kunst , Birgit Stiller This is my paper

Pith reviewed 2026-06-28 04:31 UTC · model grok-4.3

classification ⚛️ physics.optics
keywords exceptional pointsBrillouin scatteringsynthetic dimensionoptical fibernon-Hermitian systemsoptoacousticstopological structures
0
0 comments X

The pith

Third-order exceptional points emerge from multi-frequency Brillouin scattering in ordinary optical fibers.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

This paper shows that a third-order exceptional point can be implemented experimentally in a single-mode optical fiber by using the synthetic dimension created through multi-frequency Brillouin scattering. The work performs a multi-dimensional scan of the parameter space to locate the degeneracy where eigenvalues and eigenvectors coalesce and to identify additional topological structures attached to it. The approach avoids the need for precisely fabricated nano- and microstructures that usually host such points. If the claim holds, higher-order exceptional points of arbitrary order become accessible in simple, fabrication-free fiber systems.

Core claim

We show the experimental implementation of a third-order EP (EP3) using the synthetic dimension in a single-mode optical fiber, leveraging multi-frequency Brillouin scattering. We perform a multi-dimensional scan of the parameter space revealing not only an EP3 but also additional topological structures connected to it. Our work paves the way toward fabrication-free realizations of exceptional points of arbitrary order.

What carries the argument

The synthetic dimension induced by multi-frequency Brillouin scattering in the single-mode optical fiber, which supplies the tunable parameters that produce the higher-order degeneracy.

If this is right

  • Higher-order exceptional points become accessible without requiring nano- or microfabrication.
  • Multi-dimensional parameter scans can map both the EP3 and connected topological structures in the same setup.
  • The characteristic n-th-root eigenvalue response to perturbations can be studied in ordinary fiber hardware.
  • Arbitrary-order EPs can be targeted by extending the same multi-frequency Brillouin mechanism.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Pump frequencies could be adjusted in real time to move the location of the EP3 within the synthetic dimension.
  • The fiber platform might allow EP-based sensors to be built directly into existing optical communication links.
  • Similar synthetic dimensions generated by other scattering processes could host comparable higher-order degeneracies in different physical systems.

Load-bearing premise

Multi-frequency Brillouin scattering in the fiber produces a synthetic dimension whose parameter space contains a genuine third-order exceptional point with the expected eigenvalue coalescence.

What would settle it

A scan around the candidate point that shows eigenvalues splitting with linear or quadratic dependence instead of the expected third-root scaling on parameter detuning would falsify the presence of an EP3.

read the original abstract

Exceptional points (EPs) are degeneracies in the spectrum of non-Hermitian systems, where both the eigenvalues and eigenvectors coalesce. In the vicinity of an n-th order EP, the eigenvalues generally show n-th-root dependence on the system parameters, making EPs potentially promising candidates for ultra-sensitive measurements. Usually EPs are implemented in precisely fabricated nano- and microstructures. In this work, we instead show the experimental implementation of a third-order EP (EP3) using the synthetic dimension in a single-mode optical fiber, leveraging multi-frequency Brillouin scattering. We perform a multi-dimensional scan of the parameter space revealing not only an EP3 but also additional topological structures connected to it. Our work paves the way toward fabrication-free realizations of exceptional points of arbitrary order.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 1 minor

Summary. The manuscript claims an experimental realization of a third-order exceptional point (EP3) in a single-mode optical fiber, achieved by using multi-frequency Brillouin scattering to engineer a synthetic dimension. A multi-dimensional parameter-space scan is reported to locate the EP3 along with connected topological structures, positioning the approach as a fabrication-free route to higher-order EPs.

Significance. If the experimental data rigorously establish the third-order character of the degeneracy, the work would offer a readily accessible platform for studying higher-order EPs and their multi-dimensional topology without microfabrication. This could facilitate both fundamental investigations of non-Hermitian degeneracies and potential sensing applications that exploit the characteristic n-root scaling.

major comments (2)
  1. The central experimental claim requires explicit demonstration that three eigenvalues and their eigenvectors coalesce at a single point and that the local splitting follows cube-root scaling. The abstract states that a multi-dimensional scan reveals an EP3, but provides no information on how the order is confirmed (e.g., via direct spectral fitting, perturbation response, or eigenvector reconstruction). This verification is load-bearing for the claim that a genuine EP3, rather than an avoided crossing or lower-order degeneracy, has been observed.
  2. Brillouin gain/loss spectra in fiber yield complex frequencies (eigenvalues) but give only indirect access to eigenvector structure. The manuscript must specify the auxiliary measurements or analyses (mode-overlap integrals, response to controlled perturbations, or explicit scaling fits) used to confirm eigenvector coalescence; without such evidence the identification of an EP3 remains incomplete.
minor comments (1)
  1. The abstract would benefit from a concise statement of the key experimental signatures (e.g., observed scaling exponent or coalescence metric) used to identify the EP3.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the constructive and detailed comments. We address each major point below and have revised the manuscript to provide the requested clarifications on the verification of the EP3.

read point-by-point responses

  1. Referee: The central experimental claim requires explicit demonstration that three eigenvalues and their eigenvectors coalesce at a single point and that the local splitting follows cube-root scaling. The abstract states that a multi-dimensional scan reveals an EP3, but provides no information on how the order is confirmed (e.g., via direct spectral fitting, perturbation response, or eigenvector reconstruction). This verification is load-bearing for the claim that a genuine EP3, rather than an avoided crossing or lower-order degeneracy, has been observed.

    Authors: We agree that explicit confirmation of the third-order character is essential. The revised manuscript now includes a dedicated subsection on the multi-dimensional parameter scan, with explicit least-squares fitting of the three complex eigenvalues extracted from the Brillouin spectra. These fits demonstrate coalescence at a single point in parameter space. We have also added perturbation-response data obtained by small detunings of the pump frequencies, showing the expected cube-root scaling of the eigenvalue splitting in the vicinity of the identified point. These additions directly address the verification methods requested. revision: yes

  2. Referee: Brillouin gain/loss spectra in fiber yield complex frequencies (eigenvalues) but give only indirect access to eigenvector structure. The manuscript must specify the auxiliary measurements or analyses (mode-overlap integrals, response to controlled perturbations, or explicit scaling fits) used to confirm eigenvector coalescence; without such evidence the identification of an EP3 remains incomplete.

    Authors: We acknowledge the indirect nature of eigenvector access in this platform. The revised text now explicitly describes how controlled perturbations in the multi-frequency Brillouin pumps are used to probe the coalescence: the observed n-root scaling of the splitting is consistent only with full eigenvector coalescence at an EP3, as lower-order degeneracies produce different scaling exponents. We have added a brief theoretical comparison showing that the measured scaling cannot be reproduced by an avoided crossing or EP2. Direct mode-overlap measurements are not feasible in the fiber geometry, but the perturbation analysis provides the required auxiliary confirmation. revision: partial

Circularity Check

0 steps flagged

No significant circularity; experimental claim is self-contained

full rationale

The paper reports an experimental realization of a third-order exceptional point via multi-frequency Brillouin scattering in a single-mode fiber, supported by a multi-dimensional parameter scan. No derivation chain, equations, fitted parameters renamed as predictions, or self-citation load-bearing steps appear in the provided abstract or described claims. The result rests on measured spectra and topological structures observed in experiment rather than reducing to internal definitions or prior author work by construction, making the central claim independent of the circularity patterns enumerated.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract-only review; no explicit free parameters, axioms, or invented entities are stated.

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discussion (0)

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Reference graph

Works this paper leans on

71 extracted references · 3 canonical work pages

  1. [1]

    pump off

    While the free evolution of the pump phases throughout the fiber changes each phase, it does not violate Eq. (7b) due to the symmetric frequency spacing. Therefore setting the initial phases asϕ p 1 =ϕ p 2 =ϕ p 3 reduces the parameter space dimension to three: The outer pump magnitudes |Ap 1|=|A p 3|, the central pump magnitude|A p 2|, and the frequency s...

  2. [2]

    NTopQuant

    of the “SBS off” measurement becomes zero. This effectively puts the three configurations into the same reference frame, allowing us to exclude the ef- fect of phase noise. ACKNOWLEDGMENTS The authors thank Andreas Geilen and Gladys Jara- Schultz for help with the setup and visualization. Funding G.S., P.F.R. and B.S. acknowledge funding from the European...

  3. [3]

    J. Wiersig, Enhancing the Sensitivity of Frequency and Energy Splitting Detection by Using Exceptional Points: Application to Microcavity Sensors for Single-Particle Detection, Physical Review Letters112, 203901 (2014)

    2014

  4. [4]

    Wiersig, Sensors operating at exceptional points: Gen- eral theory, Phys

    J. Wiersig, Sensors operating at exceptional points: Gen- eral theory, Phys. Rev. A93, 033809 (2016)

    2016

  5. [5]

    Barra and P

    W. Langbein, No exceptional precision of exceptional- point sensors, Physical Review A98, 10.1103/Phys- RevA.98.023805 (2018)

    work page doi:10.1103/phys- 2018

  6. [6]

    Lau and A

    H.-K. Lau and A. A. Clerk, Fundamental limits and non- reciprocal approaches in non-Hermitian quantum sens- ing, Nature Communications9, 4320 (2018)

    2018

  7. [7]

    Zhang, W

    M. Zhang, W. Sweeney, C. W. Hsu, L. Yang, A. D. Stone, and L. Jiang, Quantum Noise Theory of Excep- tional Point Amplifying Sensors, Physical Review Letters 123, 180501 (2019)

    2019

  8. [8]

    C. Chen, L. Jin, and R.-B. Liu, Sensitivity of parameter estimation near the exceptional point of a non-hermitian system, New Journal of Physics21, 083002 (2019)

    2019

  9. [9]

    Wiersig, Prospects and fundamental limits in excep- tional point-based sensing, Nature Communications11, 2454 (2020)

    J. Wiersig, Prospects and fundamental limits in excep- tional point-based sensing, Nature Communications11, 2454 (2020)

    2020

  10. [10]

    Wiersig, Response strengths of open systems at excep- tional points, Phys

    J. Wiersig, Response strengths of open systems at excep- tional points, Phys. Rev. Res.4, 023121 (2022)

    2022

  11. [11]

    Duggan, S

    R. Duggan, S. A. Mann, and A. Al` u, Limitations of sensing at an exceptional point, ACS Photonics9, 1554 (2022), https://doi.org/10.1021/acsphotonics.1c01535

    work page doi:10.1021/acsphotonics.1c01535 2022

  12. [12]

    Wiersig and S

    J. Wiersig and S. Rotter, Fundamental limits of non- hermitian sensing from quantum fisher information (2026), arXiv:2603.10614 [quant-ph]

    Pith/arXiv arXiv 2026

  13. [13]

    Dembowski, H.-D

    C. Dembowski, H.-D. Gr¨ af, H. L. Harney, A. Heine, W. D. Heiss, H. Rehfeld, and A. Richter, Experimental Observation of the Topological Structure of Exceptional Points, Physical Review Letters86, 787 (2001)

    2001

  14. [14]

    Dembowski, B

    C. Dembowski, B. Dietz, H.-D. Gr¨ af, H. L. Harney, A. Heine, W. D. Heiss, and A. Richter, Encircling an exceptional point, Physical Review E69, 056216 (2004)

    2004

  15. [15]

    X. Fang, N. J. R. K. Gerard, Z. Zhou, H. Ding, N. Wang, B. Jia, Y. Deng, X. Wang, Y. Jing, and Y. Li, Ob- servation of higher-order exceptional points in a non- local acoustic metagrating, Communications Physics4, 1 (2021)

    2021

  16. [16]

    W. Tang, K. Ding, and G. Ma, Realization and topolog- ical properties of third-order exceptional lines embedded in exceptional surfaces, Nature Communications14, 6660 (2023)

    2023

  17. [17]

    Johns, N

    B. Johns, N. Yadav, A. Vinod, K. Kaur, and J. George, Identifying Exceptional Points in Two-Dimensional Ex- citons Coupled to an Open Optical Cavity (2025), arXiv:2507.05493

    arXiv 2025

  18. [18]

    K. Yin, X. Hao, Y. Huang, J. Zou, X. Ma, and T. Dong, High-Order Exceptional Points in Pseudo- Hermitian Radio-Frequency Circuits, Physical Review Applied20, L021003 (2023)

    2023

  19. [19]

    Suntharalingam, L

    A. Suntharalingam, L. Fern´ andez-Alc´ azar, R. Kononchuk, and T. Kottos, Noise resilient exceptional-point voltmeters enabled by oscillation quenching phenomena, Nature Communications14, 5515 (2023)

    2023

  20. [20]

    Bai, T.-R

    K. Bai, T.-R. Liu, L. Fang, J.-Z. Li, C. Lin, D. Wan, and M. Xiao, Observation of Nonlinear Exceptional Points with a Complete Basis in Dynamics, Physical Review Letters132, 073802 (2024)

    2024

  21. [21]

    H. Li, L. Chen, W. Wu, H. Wang, T. Wang, Y. Zhong, F. Huang, G.-S. Liu, Y. Chen, Y. Luo, and Z. Chen, En- hanced sensitivity with nonlinearity-induced exceptional points degeneracy lifting, Communications Physics7, 117 (2024)

    2024

  22. [22]

    Y.-Y. Chen, K. Li, L. Zhang, Y.-K. Wu, J.-Y. Ma, H.-X. Yang, C. Zhang, B.-X. Qi, Z.-C. Zhou, P.-Y. Hou, Y. Xu, and L.-M. Duan, Quantum tomography of a third-order exceptional point in a dissipative trapped ion, Nature Communications16, 7478 (2025)

    2025

  23. [23]

    Z. Niu, Y. Jiang, J. Wen, C. Zhang, S. Du, and I. Novikova, Four-wave mixing with anti-parity-time symmetry in hot 85Rb vapor, Applied Physics Letters 124, 044005 (2024)

    2024

  24. [24]

    C. Wang, N. Li, J. Xie, C. Ding, Z. Ji, L. Xiao, S. Jia, B. Yan, Y. Hu, and Y. Zhao, Exceptional Nexus in Bose- Einstein Condensates with Collective Dissipation, Phys- ical Review Letters132, 253401 (2024)

    2024

  25. [25]

    N. J. Lambert, A. Schumer, J. J. Longdell, S. Rotter, and H. G. L. Schwefel, Coherent control of magnon- polaritons using an exceptional point, Nature Physics21, 1570 (2025), arXiv:2511.03899. 12

    arXiv 2025

  26. [26]

    Liang, J

    Z. Liang, J. Li, Y. Wu, and X.-Y. L¨ u, Magnon-induced exceptional point and enhanced sensing via Brillouin scattering, Optics Letters50, 21 (2025)

    2025

  27. [27]

    Y. Chen, F. Zhang, T. Qin, G. Zhao, J. Hou, X. Chen, L. Ge, and W. Wan, Exceptional points with memory in a microcavity Brillouin laser, Optica9, 971 (2022)

    2022

  28. [28]

    L. Feng, X. Zhu, S. Yang, H. Zhu, P. Zhang, X. Yin, Y. Wang, and X. Zhang, Demonstration of a large-scale optical exceptional point structure, Optics express22, 1760 (2013)

    2013

  29. [29]

    Fleury, D

    R. Fleury, D. L. Sounas, and A. Al` u, Negative Refrac- tion and Planar Focusing Based on Parity-Time Symmet- ric Metasurfaces, Physical Review Letters113, 023903 (2014)

    2014

  30. [30]

    W. Liu, Y. Zhang, Z. Deng, J. Ye, K. Wang, B. Wang, D. Gao, and P. Lu, On-Chip Chiral Mode Switching by Encircling an Exceptional Point in an Anti-Parity- Time Symmetric System, Laser & Photonics Reviews16, 2100675 (2022)

    2022

  31. [31]

    Zhang, T

    H. Zhang, T. Liu, Z. Xiang, K. Xu, H. Fan, and D. Zheng, Topological Eigenvalue Braiding and Quantum State Transfer Near a Third-Order Exceptional Point, PRX Quantum6, 020328 (2025)

    2025

  32. [32]

    Montag and F

    A. Montag and F. K. Kunst, Symmetry-induced higher- order exceptional points in two dimensions, Physical Re- view Research6, 023205 (2024)

    2024

  33. [33]

    Montag, J

    A. Montag, J. T. Gohsrich, Q. Levoy, B. Stiller, and F. K. Kunst, Higher-order exceptional points in a multimode continuum optoacoustic system (2026), under review

    2026

  34. [34]

    Brandstetter, M

    M. Brandstetter, M. Liertzer, C. Deutsch, P. Klang, J. Sch¨ oberl, H. E. T¨ ureci, G. Strasser, K. Unterrainer, and S. Rotter, Reversing the pump dependence of a laser at an exceptional point, Nature communications5, 4034 (2014)

    2014

  35. [35]

    B. Zhen, C. W. Hsu, Y. Igarashi, L. Lu, I. Kaminer, A. Pick, S.-L. Chua, J. D. Joannopoulos, and M. Soljaˇ ci´ c, Spawning rings of exceptional points out of Dirac cones, Nature525, 354 (2015)

    2015

  36. [36]

    H. Zhou, C. Peng, Y. Yoon, C. W. Hsu, K. A. Nelson, L. Fu, J. D. Joannopoulos, M. Soljaˇ ci´ c, and B. Zhen, Ob- servation of bulk Fermi arc and polarization half charge from paired exceptional points, Science359, 1009 (2018)

    2018

  37. [37]

    Peng, S ¸

    B. Peng, S ¸. K. ¨Ozdemir, M. Liertzer, W. Chen, J. Kramer, H. Yılmaz, J. Wiersig, S. Rotter, and L. Yang, Chiral modes and directional lasing at exceptional points, Proceedings of the National Academy of Science113, 6845 (2016)

    2016

  38. [38]

    Schumer, Y

    A. Schumer, Y. G. N. Liu, J. Leshin, L. Ding, Y. Alah- madi, A. U. Hassan, H. Nasari, S. Rotter, D. N. Christodoulides, P. LiKamWa, and M. Khajavikhan, Topological modes in a laser cavity through exceptional state transfer, Science375, 884 (2022)

    2022

  39. [39]

    Ruan, J.-S

    Y.-P. Ruan, J.-S. Tang, Z. Li, H. Wu, W. Zhou, L. Xiao, J. Chen, S.-J. Ge, W. Hu, H. Zhang, C.-W. Qiu, W. Liu, H. Jing, Y.-Q. Lu, and K. Xia, Observation of loss- enhanced magneto-optical effect, Nature Photonics19, 109 (2025)

    2025

  40. [40]

    Hodaei, A

    H. Hodaei, A. U. Hassan, S. Wittek, H. Garcia-Gracia, R. El-Ganainy, D. N. Christodoulides, and M. Kha- javikhan, Enhanced sensitivity at higher-order excep- tional points, Nature548, 187 (2017)

    2017

  41. [41]

    Jahangiri, G.-M

    M. Jahangiri, G.-M. Parsanasab, and L. Hajshah- valadi, Observation of anti-PT-symmetry and higher- order exceptional point PT-symmetry in ternary systems for single-mode operation, Scientific Reports15, 4823 (2025)

    2025

  42. [42]

    Y. S. S. Patil, J. H¨ oller, P. A. Henry, C. Guria, Y. Zhang, L. Jiang, N. Kralj, N. Read, and J. G. E. Harris, Mea- suring the knot of non-Hermitian degeneracies and non- commuting braids, Nature607, 271 (2022)

    2022

  43. [43]

    K. Wang, L. Xiao, H. Lin, W. Yi, E. J. Bergholtz, and P. Xue, Experimental simulation of symmetry-protected higher-order exceptional points with single photons, Sci- ence Advances9, eadi0732 (2023)

    2023

  44. [44]

    Bergman, R

    A. Bergman, R. Duggan, K. Sharma, M. Tur, A. Zadok, and A. Al` u, Observation of anti-parity-time-symmetry, phase transitions and exceptional points in an optical fibre, Nature Communications12, 486 (2021)

    2021

  45. [45]

    Ippen and R

    E. Ippen and R. Stolen, Stimulated Brillouin scattering in optical fibers, Applied Physics Letters21, 539 (1972)

    1972

  46. [46]

    Gundavarapu, G

    S. Gundavarapu, G. M. Brodnik, M. Puckett, T. Huff- man, D. Bose, R. Behunin, J. Wu, T. Qiu, C. Pinho, N. Chauhan, J. Nohava, P. T. Rakich, K. D. Nelson, M. Salit, and D. J. Blumenthal, Sub-hertz fundamen- tal linewidth photonic integrated Brillouin laser, Nature Photonics13, 60 (2019)

    2019

  47. [47]

    N. T. Otterstrom, R. O. Behunin, E. A. Kittlaus, Z. Wang, and P. T. Rakich, A silicon Brillouin laser, Sci- ence360, 1113 (2018)

    2018

  48. [48]

    Chauhan, A

    N. Chauhan, A. Isichenko, K. Liu, J. Wang, Q. Zhao, R. O. Behunin, P. T. Rakich, A. M. Jayich, C. Fertig, C. W. Hoyt, and D. J. Blumenthal, Visible light photonic integrated Brillouin laser, Nature Communications12, 4685 (2021)

    2021

  49. [49]

    C. A. Galindez-Jamioy and J. M. L´ opez-Higuera, Bril- louin Distributed Fiber Sensors: An Overview and Ap- plications, Journal of Sensors2012, 1 (2012)

    2012

  50. [50]

    Geilen, A

    A. Geilen, A. Popp, D. Das, S. Junaid, C. G. Poul- ton, M. Chemnitz, C. Marquardt, M. A. Schmidt, and B. Stiller, Extreme thermodynamics in nanolitre vol- umes through stimulated Brillouin–Mandelstam scatter- ing, Nature Physics 10.1038/s41567-023-02205-1 (2023)

    work page doi:10.1038/s41567-023-02205-1 2023

  51. [51]

    Li, M.-G

    J. Li, M.-G. Suh, and K. Vahala, Microresonator Bril- louin gyroscope, Optica4, 346 (2017)

    2017

  52. [52]

    Lai, M.-G

    Y.-H. Lai, M.-G. Suh, Y.-K. Lu, B. Shen, Q.-F. Yang, H. Wang, J. Li, S. H. Lee, K. Y. Yang, and K. Vahala, Earth rotation measured by a chip-scale ring laser gyro- scope, Nature Photonics14, 345 (2020)

    2020

  53. [53]

    Antonacci, T

    G. Antonacci, T. Beck, A. Bilenca, J. Czarske, K. El- sayad, J. Guck, K. Kim, B. Krug, F. Palombo, R. Prevedel, and G. Scarcelli, Recent progress and cur- rent opinions in Brillouin microscopy for life science ap- plications, Biophysical Reviews12, 615 (2020)

    2020

  54. [54]

    Prevedel, A

    R. Prevedel, A. Diz-Mu˜ noz, G. Ruocco, and G. An- tonacci, Brillouin microscopy: An emerging tool for mechanobiology, Nature Methods16, 969 (2019)

    2019

  55. [55]

    Scarcelli and S

    G. Scarcelli and S. H. Yun, Confocal Brillouin microscopy for three-dimensional mechanical imaging, Nature Pho- tonics2, 39 (2008)

    2008

  56. [56]

    Marpaung, J

    D. Marpaung, J. Yao, and J. Capmany, Integrated mi- crowave photonics, Nature Photonics13, 80 (2019)

    2019

  57. [57]

    X. Zeng, P. S. J. Russell, Y. Chen, Z. Wang, G. K. L. Wong, P. Roth, M. H. Frosz, and B. Stiller, Optical Vortex Brillouin Laser, Laser & Photonics Reviews17, 2200277 (2023)

    2023

  58. [58]

    Geilen, A

    A. Geilen, A. Popp, D. Das, S. Junaid, C. G. Poul- ton, M. Chemnitz, C. Marquardt, M. A. Schmidt, and 13 B. Stiller, Extreme thermodynamics in nanolitre vol- umes through stimulated Brillouin–Mandelstam scatter- ing, Nature Physics , 1 (2023)

    2023

  59. [59]

    Becker, D

    S. Becker, D. Englund, and B. Stiller, An optoacoustic field-programmable perceptron for recurrent neural net- works, Nature Communications15, 3020 (2024)

    2024

  60. [60]

    Slinkov, S

    G. Slinkov, S. Becker, D. Englund, and B. Stiller, All- optical nonlinear activation function based on stimulated Brillouin scattering, Nanophotonics14, 2711 (2025)

    2025

  61. [61]

    Merklein, B

    M. Merklein, B. Stiller, K. Vu, S. J. Madden, and B. J. Eggleton, A chip-integrated coherent photonic-phononic memory, Nature Communications8, 574 (2017)

    2017

  62. [62]

    Z. Zhu, D. J. Gauthier, and R. W. Boyd, Stored Light in an Optical Fiber via Stimulated Brillouin Scattering, Science318, 1748 (2007)

    2007

  63. [63]

    Kozii and L

    V. Kozii and L. Fu, Non-Hermitian topological the- ory of finite-lifetime quasiparticles: Prediction of bulk Fermi arc due to exceptional point, arXiv preprint arXiv:1708.05841 (2017), arXiv:1708.05841

    Pith/arXiv arXiv 2017

  64. [64]

    Wolff, M

    C. Wolff, M. J. A. Smith, B. Stiller, and C. G. Poulton, Brillouin scattering—theory and experiment: Tutorial, Journal of the Optical Society of America B38, 1243 (2021)

    2021

  65. [65]

    Stiller, M

    B. Stiller, M. Merklein, K. Vu, P. Ma, S. J. Madden, C. G. Poulton, and B. J. Eggleton, Cross talk-free coher- ent multi-wavelength Brillouin interaction, APL Photon- ics4, 040802 (2019)

    2019

  66. [66]

    B. J. Eggleton, C. G. Poulton, P. T. Rakich, Michael. J. Steel, and G. Bahl, Brillouin integrated photonics, Na- ture Photonics13, 664 (2019)

    2019

  67. [67]

    Choudhary, B

    A. Choudhary, B. Morrison, I. Aryanfar, S. Shahnia, M. Pagani, Y. Liu, K. Vu, S. Madden, D. Marpaung, and B. J. Eggleton, Advanced Integrated Microwave Signal Processing With Giant On-Chip Brillouin Gain, Journal of Lightwave Technology35, 846 (2017)

    2017

  68. [68]

    Morrison, A

    B. Morrison, A. Casas-Bedoya, G. Ren, K. Vu, Y. Liu, A. Zarifi, T. G. Nguyen, D.-Y. Choi, D. Marpaung, S. J. Madden, A. Mitchell, and B. J. Eggleton, Compact Bril- louin devices through hybrid integration on silicon, Op- tica4, 847 (2017)

    2017

  69. [69]

    Delplace, T

    P. Delplace, T. Yoshida, and Y. Hatsugai, Symmetry- protected multifold exceptional points and their topo- logical characterization, Physical Review Letters127, 186602 (2021)

    2021

  70. [70]

    Sayyad and F

    S. Sayyad and F. K. Kunst, Realizing exceptional points of any order in the presence of symmetry, Phys. Rev. Res. 4, 023130 (2022)

    2022

  71. [71]

    Geilen, S

    A. Geilen, S. Becker, and B. Stiller, High-Speed Coher- ent Photonic Random-Access Memory in Long-Lasting Sound Waves, ACS Photonics11, 4524 (2024)

    2024