Understanding all-optical switching at the epsilon-near-zero point: a tutorial review

Fruhling, Colton; Ozlu, Mustafa Goksu; Saha, Soham; Boltasseva, Alexandra; Shalaev, Vladimir M.

doi:10.1007/s00340-022-07756-4

Understanding all-optical switching at the epsilon-near-zero point: a tutorial review

Journal Article · 29 January 2022 · Applied Physics. B, Lasers and Optics

DOI:https://doi.org/10.1007/s00340-022-07756-4· OSTI ID:1976620

; Ozlu, Mustafa Goksu; Saha, Soham; Boltasseva, Alexandra; Shalaev, Vladimir M.

Not provided.

Research Organization:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: SC0017717

OSTI ID:: 1976620

Journal Information:: Applied Physics. B, Lasers and Optics, Vol. 128, Issue 2; ISSN 0946-2171

Publisher:: Springer

Country of Publication:: United States

Language:: English

References (85)

Nonlinear Plasmonic Photoelectron Response of Ag(111) Reutzel, Marcel; Li, Andi; Gumhalter, Branko Physical Review Letters, Vol. 123, Issue 1 https://doi.org/10.1103/PhysRevLett.123.017404	journal	July 2019
Optical Constants of the Noble Metals Johnson, P. B.; Christy, R. W. Physical Review B, Vol. 6, Issue 12, p. 4370-4379 https://doi.org/10.1103/PhysRevB.6.4370	journal	December 1972
Alternative Plasmonic Materials: Beyond Gold and Silver Naik, Gururaj V.; Shalaev, Vladimir M.; Boltasseva, Alexandra Advanced Materials, Vol. 25, Issue 24 https://doi.org/10.1002/adma.201205076	journal	May 2013
Epsilon-near-zero Al-doped ZnO for ultrafast switching at telecom wavelengths Kinsey, N.; DeVault, C.; Kim, J. Optica, Vol. 2, Issue 7 https://doi.org/10.1364/OPTICA.2.000616	journal	January 2015
Ultrafast Nonlinear Response of Bulk Plasmons in Highly Doped ZnO Layers Tyborski, Tobias; Kalusniak, Sascha; Sadofev, Sergey Physical Review Letters, Vol. 115, Issue 14 https://doi.org/10.1103/PhysRevLett.115.147401	journal	September 2015
Large optical nonlinearity of indium tin oxide in its epsilon-near-zero region Alam, M. Z.; De Leon, I.; Boyd, R. W. Science, Vol. 352, Issue 6287 https://doi.org/10.1126/science.aae0330	journal	April 2016
Extreme nonlinear electrodynamics in metamaterials with very small linear dielectric permittivity Ciattoni, A.; Rizza, C.; Palange, E. Physical Review A, Vol. 81, Issue 4 https://doi.org/10.1103/PhysRevA.81.043839	journal	April 2010
Boosting optical nonlinearities in ε -near-zero plasmonic channels Argyropoulos, Christos; Chen, Pai-Yen; D’Aguanno, Giuseppe Physical Review B, Vol. 85, Issue 4 https://doi.org/10.1103/PhysRevB.85.045129	journal	January 2012
Experimental Verification of Epsilon-Near-Zero Metamaterial Coupling and Energy Squeezing Using a Microwave Waveguide Edwards, Brian; Alù, Andrea; Young, Michael E. Physical Review Letters, Vol. 100, Issue 3 https://doi.org/10.1103/PhysRevLett.100.033903	journal	January 2008
Optical properties of metal-dielectric based epsilon near zero metamaterials Subramania, G.; Fischer, A. J.; Luk, T. S. Applied Physics Letters, Vol. 101, Issue 24 https://doi.org/10.1063/1.4770517	journal	December 2012
Experimental realization of an epsilon-near-zero metamaterial at visible wavelengths Maas, Ruben; Parsons, James; Engheta, Nader Nature Photonics, Vol. 7, Issue 11, p. 907-912 https://doi.org/10.1038/nphoton.2013.256	journal	October 2013
Epsilon near zero based phenomena in metamaterials Basharin, Alexey A.; Mavidis, Charalampos; Kafesaki, Maria Physical Review B, Vol. 87, Issue 15 https://doi.org/10.1103/PhysRevB.87.155130	journal	April 2013
Enhanced Nonlinear Optical Responses of Layered Epsilon-near-Zero Metamaterials at Visible Frequencies Suresh, Sisira; Reshef, Orad; Alam, M. Zahirul ACS Photonics, Vol. 8, Issue 1 https://doi.org/10.1021/acsphotonics.0c01178	journal	December 2020
Dirac-like cone-based electromagnetic zero-index metamaterials Li, Yang; Chan, C. T.; Mazur, Eric Light: Science & Applications, Vol. 10, Issue 1 https://doi.org/10.1038/s41377-021-00642-2	journal	September 2021
Integrated zero-index supercouplers Vulis, Daryl I.; Camayd-Muñoz, Philip; Li, Yang Frontiers in Optics 2017 https://doi.org/10.1364/FIO.2017.JW3A.108	conference	January 2017
Tunneling of Electromagnetic Energy through Subwavelength Channels and Bends using ε -Near-Zero Materials Silveirinha, Mário; Engheta, Nader Physical Review Letters, Vol. 97, Issue 15 https://doi.org/10.1103/PhysRevLett.97.157403	journal	October 2006
Theory of supercoupling, squeezing wave energy, and field confinement in narrow channels and tight bends using ε near-zero metamaterials Silveirinha, Mário G.; Engheta, Nader Physical Review B, Vol. 76, Issue 24 https://doi.org/10.1103/PhysRevB.76.245109	journal	December 2007
A Metamaterial for Directive Emission Enoch, Stefan; Tayeb, Gérard; Sabouroux, Pierre Physical Review Letters, Vol. 89, Issue 21 https://doi.org/10.1103/PhysRevLett.89.213902	journal	November 2002
Epsilon-near-zero metamaterials and electromagnetic sources: Tailoring the radiation phase pattern Alù, Andrea; Silveirinha, Mário G.; Salandrino, Alessandro Physical Review B, Vol. 75, Issue 15 https://doi.org/10.1103/PhysRevB.75.155410	journal	April 2007
Possible implementation of epsilon-near-zero metamaterials working at optical frequencies Monti, Alessio; Bilotti, Filiberto; Toscano, Alessandro Optics Communications, Vol. 285, Issue 16 https://doi.org/10.1016/j.optcom.2011.12.037	journal	July 2012
Directional perfect absorption using deep subwavelength low-permittivity films Luk, Ting S.; Campione, Salvatore; Kim, Iltai Physical Review B, Vol. 90, Issue 8, Article No. 085411 https://doi.org/10.1103/PhysRevB.90.085411	journal	August 2014
Omnidirectional Near-Unity Absorption in an Ultrathin Planar Semiconductor Layer on a Metal Substrate Park, Junghyun; Kang, Ju-Hyung; Vasudev, Alok P. ACS Photonics, Vol. 1, Issue 9 https://doi.org/10.1021/ph500093d	journal	August 2014
Epsilon-Near-Zero Substrate Engineering for Ultrathin-Film Perfect Absorbers Rensberg, Jura; Zhou, You; Richter, Steffen Physical Review Applied, Vol. 8, Issue 1 https://doi.org/10.1103/PhysRevApplied.8.014009	journal	July 2017
Self-organization of frozen light in near-zero-index media with cubic nonlinearity Marini, A.; García de Abajo, F. J. Scientific Reports, Vol. 6, Issue 1 https://doi.org/10.1038/srep20088	journal	February 2016
Enhanced Nonlinear Refractive Index in ε -Near-Zero Materials Caspani, L.; Kaipurath, R. P. M.; Clerici, M. Physical Review Letters, Vol. 116, Issue 23 https://doi.org/10.1103/PhysRevLett.116.233901	journal	June 2016
Large optical nonlinearity of nanoantennas coupled to an epsilon-near-zero material Alam, M. Zahirul; Schulz, Sebastian A.; Upham, Jeremy Nature Photonics, Vol. 12, Issue 2 https://doi.org/10.1038/s41566-017-0089-9	journal	January 2018
Large optical nonlinearity of ITO/Ag/ITO sandwiches based on Z-scan measurement Wu, Ke; Wang, Zhewei; Yang, Jianhan Optics Letters, Vol. 44, Issue 10 https://doi.org/10.1364/OL.44.002490	journal	May 2019
Near-zero refractive index photonics Liberal, Iñigo; Engheta, Nader Nature Photonics, Vol. 11, Issue 3 https://doi.org/10.1038/nphoton.2017.13	journal	March 2017
Epsilon-Near-Zero Photonics: A New Platform for Integrated Devices Niu, Xinxiang; Hu, Xiaoyong; Chu, Saisai Advanced Optical Materials, Vol. 6, Issue 10 https://doi.org/10.1002/adom.201701292	journal	March 2018
Near-zero-index materials for photonics Kinsey, Nathaniel; DeVault, Clayton; Boltasseva, Alexandra Nature Reviews Materials, Vol. 4, Issue 12 https://doi.org/10.1038/s41578-019-0133-0	journal	September 2019
Nonlinear optical effects in epsilon-near-zero media Reshef, Orad; De Leon, Israel; Alam, M. Zahirul Nature Reviews Materials, Vol. 4, Issue 8 https://doi.org/10.1038/s41578-019-0120-5	journal	June 2019
Epsilon-near-zero photonics: infinite potentials Wu, Jiaye; Xie, Ze Tao; Sha, Yanhua Photonics Research, Vol. 9, Issue 8 https://doi.org/10.1364/PRJ.427246	journal	July 2021
Low-Loss Plasmonic Metamaterials Boltasseva, A.; Atwater, H. A. Science, Vol. 331, Issue 6015, p. 290-291 https://doi.org/10.1126/science.1198258	journal	January 2011
Oxides and nitrides as alternative plasmonic materials in the optical range [Invited] Naik, Gururaj V.; Kim, Jongbum; Boltasseva, Alexandra Optical Materials Express, Vol. 1, Issue 6 https://doi.org/10.1364/OME.1.001090	journal	January 2011
Controlling hybrid nonlinearities in transparent conducting oxides via two-colour excitation Clerici, M.; Kinsey, N.; DeVault, C. Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/ncomms15829	journal	June 2017
Femtosecond optical polarization switching using a cadmium oxide-based perfect absorber Yang, Yuanmu; Kelley, Kyle; Sachet, Edward Nature Photonics, Vol. 11, Issue 6 https://doi.org/10.1038/nphoton.2017.64	journal	May 2017
Atomic Layer Engineering of Epsilon‐Near‐Zero Ultrathin Films with Controllable Field Enhancement Gurung, Sudip; Anopchenko, Aleksei; Bej, Subhajit Advanced Materials Interfaces, Vol. 7, Issue 17 https://doi.org/10.1002/admi.202000844	journal	June 2020
Broadband, High‐Speed, and Large‐Amplitude Dynamic Optical Switching with Yttrium‐Doped Cadmium Oxide Saha, Soham; Diroll, Benjamin T.; Shank, Joshua Advanced Functional Materials, Vol. 30, Issue 7 https://doi.org/10.1002/adfm.201908377	journal	December 2019
Broadband Electroabsorption Modulators Design Based on Epsilon-Near-Zero Indium Tin Oxide Zhao, Hongwei; Wang, Yu; Capretti, Antonio IEEE Journal of Selected Topics in Quantum Electronics, Vol. 21, Issue 4 https://doi.org/10.1109/JSTQE.2014.2375153	journal	July 2015
Optical and electrical properties of ultra-thin indium tin oxide nanofilms on silicon for infrared photonics Cleary, Justin W.; Smith, Evan M.; Leedy, Kevin D. Optical Materials Express, Vol. 8, Issue 5 https://doi.org/10.1364/OME.8.001231	journal	January 2018
All-Optical Control of a Single Plasmonic Nanoantenna–ITO Hybrid Abb, Martina; Albella, Pablo; Aizpurua, Javier Nano Letters, Vol. 11, Issue 6 https://doi.org/10.1021/nl200901w	journal	June 2011
Enhanced third-harmonic generation in Si-compatible epsilon-near-zero indium tin oxide nanolayers Capretti, Antonio; Wang, Yu; Engheta, Nader Optics Letters, Vol. 40, Issue 7 https://doi.org/10.1364/OL.40.001500	journal	January 2015
Highly efficient ultraviolet high-harmonic generation from epsilon-near-zero indium tin oxide films Tian, Wendong; Liang, Fei; Lu, Dazhi Photonics Research, Vol. 9, Issue 3 https://doi.org/10.1364/PRJ.414570	journal	January 2021
Role of epsilon-near-zero substrates in the optical response of plasmonic antennas Kim, Jongbum; Dutta, Aveek; Naik, Gururaj V. Optica, Vol. 3, Issue 3 https://doi.org/10.1364/OPTICA.3.000339	journal	January 2016
Plasmonic Antenna Resonance Pinning and Suppression of Near-Field Coupling from Epsilon-Near-Zero Substrate De Vault, C.; Zenin, V. A.; Pors, A. CLEO: QELS_Fundamental Science, Conference on Lasers and Electro-Optics https://doi.org/10.1364/CLEO_QELS.2017.FTu4H.5	conference	January 2017
Optical response of dipole antennas on an epsilon-near-zero substrate Schulz, Sebastian A.; Tahir, Asad A.; Alam, M. Zahirul Physical Review A, Vol. 93, Issue 6 https://doi.org/10.1103/PhysRevA.93.063846	journal	June 2016
Optical Time Reversal from Time-Dependent Epsilon-Near-Zero Media Vezzoli, Stefano; Bruno, Vincenzo; DeVault, Clayton Physical Review Letters, Vol. 120, Issue 4 https://doi.org/10.1103/PhysRevLett.120.043902	journal	January 2018
Adiabatic frequency shifting in epsilon-near-zero materials: the role of group velocity Khurgin, Jacob B.; Clerici, Matteo; Bruno, Vincenzo Optica, Vol. 7, Issue 3 https://doi.org/10.1364/OPTICA.374788	journal	January 2020
Adiabatic Frequency Conversion Using a Time-Varying Epsilon-Near-Zero Metasurface Pang, Kai; Alam, M. Zahirul; Zhou, Yiyu Nano Letters, Vol. 21, Issue 14 https://doi.org/10.1021/acs.nanolett.1c00550	journal	July 2021
Broadband frequency translation through time refraction in an epsilon-near-zero material Zhou, Yiyu; Alam, M. Zahirul; Karimi, Mohammad Nature Communications, Vol. 11, Issue 1 https://doi.org/10.1038/s41467-020-15682-2	journal	May 2020
Topological aspects of photonic time crystals Lustig, Eran; Sharabi, Yonatan; Segev, Mordechai Optica, Vol. 5, Issue 11 https://doi.org/10.1364/OPTICA.5.001390	journal	January 2018
Fast and Slow Nonlinearities in Epsilon‐Near‐Zero Materials Khurgin, Jacob B.; Clerici, Matteo; Kinsey, Nathaniel Laser & Photonics Reviews, Vol. 15, Issue 2 https://doi.org/10.1002/lpor.202000291	journal	December 2020
Slow light in various media: a tutorial Khurgin, Jacob B. Advances in Optics and Photonics, Vol. 2, Issue 3 https://doi.org/10.1364/AOP.2.000287	journal	January 2010
Nonlinear epsilon-near-zero materials explained: opinion Kinsey, N.; Khurgin, J. Optical Materials Express, Vol. 9, Issue 7 https://doi.org/10.1364/OME.9.002793	journal	January 2019
Broadband Ultrafast Dynamics of Refractory Metals: TiN and ZrN Diroll, Benjamin T.; Saha, Soham; Shalaev, Vladimir M. Advanced Optical Materials, Vol. 8, Issue 19 https://doi.org/10.1002/adom.202000652	journal	July 2020
All-optical switching of an epsilon-near-zero plasmon resonance in indium tin oxide Bohn, Justus; Luk, Ting Shan; Tollerton, Craig Nature Communications, Vol. 12, Issue 1 https://doi.org/10.1038/s41467-021-21332-y	journal	February 2021
Extraordinarily large permittivity modulation in zinc oxide for dynamic nanophotonics Saha, Soham; Dutta, Aveek; DeVault, Clayton Materials Today, Vol. 43 https://doi.org/10.1016/j.mattod.2020.10.023	journal	March 2021
Transparent conducting oxides for electro-optical plasmonic modulators Babicheva, Viktoriia E.; Boltasseva, Alexandra; Lavrinenko, Andrei V. Nanophotonics, Vol. 4, Issue 1 https://doi.org/10.1515/nanoph-2015-0004	journal	June 2015
Ultrafast Active Tuning of the Berreman Mode Dunkelberger, Adam D.; Ratchford, Daniel C.; Grafton, Andrea B. ACS Photonics, Vol. 7, Issue 1 https://doi.org/10.1021/acsphotonics.9b01578	journal	December 2019
Absorptive loss and band non-parabolicity as a physical origin of large nonlinearity in epsilon-near-zero materials Secondo, Ray; Khurgin, Jacob; Kinsey, Nathaniel Optical Materials Express, Vol. 10, Issue 7 https://doi.org/10.1364/OME.394111	journal	January 2020
Hot electron dynamics in ultrafast multilayer epsilon-near-zero metamaterials Rashed, Alireza R.; Yildiz, Bilge Can; Ayyagari, Surya R. Physical Review B, Vol. 101, Issue 16 https://doi.org/10.1103/PhysRevB.101.165301	journal	April 2020
Role of hot electron scattering in epsilon-near-zero optical nonlinearity Wang, Heng; Du, Kang; Liu, Ruibin Nanophotonics, Vol. 9, Issue 14 https://doi.org/10.1515/nanoph-2020-0266	journal	July 2020
A Solution-Processed Ultrafast Optical Switch Based on a Nanostructured Epsilon-Near-Zero Medium Guo, Qiangbing; Cui, Yudong; Yao, Yunhua Advanced Materials, Vol. 29, Issue 27 https://doi.org/10.1002/adma.201700754	journal	May 2017
Nonlinearities and carrier dynamics in refractory plasmonic TiN thin films George, Heather; Reed, Jennifer; Ferdinandus, Manuel Optical Materials Express, Vol. 9, Issue 10 https://doi.org/10.1364/OME.9.003911	journal	January 2019
Theory of epsilon-near-zero modes in ultrathin films Campione, Salvatore; Brener, Igal; Marquier, Francois Physical Review B, Vol. 91, Issue 12, Article No. 121408(R) https://doi.org/10.1103/PhysRevB.91.121408	journal	March 2015
Experimental verification of epsilon-near-zero plasmon polariton modes in degenerately doped semiconductor nanolayers Campione, Salvatore; Kim, Iltai; de Ceglia, Domenico Optics Express, Vol. 24, Issue 16 https://doi.org/10.1364/OE.24.018782	journal	January 2016
Refractive index errors in the critical-angle and the Brewster-angle methods applied to absorbing and heterogeneous materials Meeten, G. H. Measurement Science and Technology, Vol. 8, Issue 7 https://doi.org/10.1088/0957-0233/8/7/006	journal	July 1997
Collective Electronic Motion in a Metallic Slab Kliewer, K. L.; Fuchs, Ronald Physical Review, Vol. 153, Issue 2 https://doi.org/10.1103/PhysRev.153.498	journal	January 1967
Ultrafast plasmonics using transparent conductive oxide hybrids in the epsilon-near-zero regime Traviss, Daniel; Bruck, Roman; Mills, Ben Applied Physics Letters, Vol. 102, Issue 12 https://doi.org/10.1063/1.4798833	journal	March 2013
Remote Sensing of High Temperatures with Refractory, Direct-Contact Optical Metacavity Chaudhuri, Krishnakali; Guler, Urcan; Azzam, Shaimaa I. ACS Photonics, Vol. 7, Issue 2 https://doi.org/10.1021/acsphotonics.9b01450	journal	January 2020
Long-range surface plasmon polaritons Berini, Pierre Advances in Optics and Photonics, Vol. 1, Issue 3 https://doi.org/10.1364/AOP.1.000484	journal	January 2009
Predicted Radiation of Plasma Oscillations in Metal Films Ferrell, Richard A. Physical Review, Vol. 111, Issue 5 https://doi.org/10.1103/PhysRev.111.1214	journal	September 1958
Infrared Absorption at Longitudinal Optic Frequency in Cubic Crystal Films Berreman, D. W. Physical Review, Vol. 130, Issue 6 https://doi.org/10.1103/PhysRev.130.2193	journal	June 1963
Ferrell–Berreman Modes in Plasmonic Epsilon-near-Zero Media Newman, Ward D.; Cortes, Cristian L.; Atkinson, Jon ACS Photonics, Vol. 2, Issue 1 https://doi.org/10.1021/ph5003297	journal	December 2014
Notizen: Radiative Decay of Non Radiative Surface Plasmons Excited by Light Kretschmann, E.; Raether, H. Zeitschrift für Naturforschung A, Vol. 23, Issue 12 https://doi.org/10.1515/zna-1968-1247	journal	December 1968
Field-Effect Tunable and Broadband Epsilon-Near-Zero Perfect Absorbers with Deep Subwavelength Thickness Anopchenko, Aleksei; Tao, Long; Arndt, Catherine ACS Photonics, Vol. 5, Issue 7 https://doi.org/10.1021/acsphotonics.7b01373	journal	December 2017
Exciting surface plasmon polaritons in the Kretschmann configuration by a light beam Vinogradov, A. P.; Dorofeenko, A. V.; Pukhov, A. A. Physical Review B, Vol. 97, Issue 23 https://doi.org/10.1103/PhysRevB.97.235407	journal	June 2018
Berreman mode and epsilon near zero mode Vassant, Simon; Hugonin, Jean-Paul; Marquier, Francois Optics Express, Vol. 20, Issue 21, p. 23971-23977 https://doi.org/10.1364/OE.20.023971	journal	January 2012
Epsilon-near-Zero Modes and Surface Plasmon Resonance in Fluorine-Doped Cadmium Oxide Thin Films Runnerstrom, Evan L.; Kelley, Kyle P.; Sachet, Edward ACS Photonics, Vol. 4, Issue 8 https://doi.org/10.1021/acsphotonics.7b00429	journal	July 2017
Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides Carnemolla, Enrico Giuseppe; Caspani, Lucia; DeVault, Clayton Optical Materials Express, Vol. 8, Issue 11 https://doi.org/10.1364/OME.8.003392	journal	January 2018
High-harmonic generation from an epsilon-near-zero material Yang, Yuanmu; Lu, Jian; Manjavacas, Alejandro Nature Physics, Vol. 15, Issue 10 https://doi.org/10.1038/s41567-019-0584-7	journal	July 2019
Dynamics of plasma formation, relaxation, and topography modification induced by femtosecond laser pulses in crystalline and amorphous dielectrics Puerto, D.; Siegel, J.; Gawelda, W. Journal of the Optical Society of America B, Vol. 27, Issue 5 https://doi.org/10.1364/JOSAB.27.001065	journal	April 2010
Transient Drude Response Dominates Near-Infrared Pump–Probe Reflectivity in Nodal-Line Semimetals ZrSiS and ZrSiSe Kirby, Robert J.; Ferrenti, Austin; Weinberg, Caroline The Journal of Physical Chemistry Letters, Vol. 11, Issue 15 https://doi.org/10.1021/acs.jpclett.0c01377	journal	July 2020
Ultrafast all-optical switching enabled by epsilon-near-zero-tailored absorption in metal-insulator nanocavities Kuttruff, Joel; Garoli, Denis; Allerbeck, Jonas Communications Physics, Vol. 3, Issue 1 https://doi.org/10.1038/s42005-020-0379-2	journal	June 2020
Broad Frequency Shift of Parametric Processes in Epsilon-Near-Zero Time-Varying Media Bruno, Vincenzo; Vezzoli, Stefano; DeVault, Clayton Applied Sciences, Vol. 10, Issue 4 https://doi.org/10.3390/app10041318	journal	February 2020

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