Publications

Abasifard, M., Cholsuk, C., Pousa, R., Kumar, A., Zand, A., Riel, T., KL Oi, D., Vogl, T., The ideal wavelength for daylight free-space quantum key distributionExternal link, APL Quantum 1, 016113, 2024.

Ahmadi, N., Schwertfeger, S., Werner, P., Wiese, L., Lester, J., Da Ros, E., Krause, J., Ritter, S., Abasifard, M., Cholsuk, C., Krämer, R. G., Atzeni, S., Gündogan, M., Sachidananda, S., Pardo, D., Nolte, S., Lohrmann, A., Ling, Alxd, Bartholomäus, J., Corrielli, G., Krutzik, M., Vogl, T., QUICK3 - Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in spaceExternal link, Advanced Quantum Technologies 7 (4), 9, 2024.

Alberucci, A., Jisha, C. P., Nolte, S., Application of the Green's function formalism to the interplay between avalanche and multiphoton ionization induced by optical pulsesExternal link, Physical Review B 109 (14), 9, 2024.

Bartnick, M., Bharathan, G., Goebel, T. A., Krämer, R. G., Nolte, S., Brés, C. S., Wavelength-stabilized figure-of-9 thulium-doped all-fiber laser emitting 560 fs pulsesExternal link, Laser Physics 34 (2), 7, 2024.

Blothe, M., Alberucci, A., Alasgarzade, N., Chambonneau, M., Nolte, S., Transverse Inscription of Silicon Waveguides by Picosecond Laser PulsesExternal link, Laser & Photonics Reviews 18 (11), 12, 2024.

Cholsuk, C., Cakan, A., Suwanna, S., Vogl, T., Identifying Electronic Transitions of Defects in Hexagonal Boron Nitride for Quantum MemoriesExternal link, Advanced Optical Materials 12 (13), 11, 2024.

Cholsuk, C., Davani, S., Conlon, L. O., Vogl, T., Eilenberger, F., Efficient light propagation algorithm using quantum computersExternal link, Physica Scripta 99 (4), 9, 2024.

Cholsuk, C., Zand, A., Çakan, A., Vogl, T., The hBN Defects Database: A Theoretical Compilation of Color Centers in Hexagonal Boron NitrideExternal link, Journal of Physical Chemistry C 128 (30), 12716-12725, 2024.

Conlon, L. O., Walsh, A., Hua, Y. H., Thearle, O., Vogl, T., Eilenberger, F., Lam, P. K., Assad, S. M., Testing the postulates of quantum mechanics with coherent states of light and homodyne detectionExternal link, New Journal of Physics 26 (5), 14, 2024.

Gour, J., Beer, S., Paul, P., Alberucci, A., Steinert, M., Szeghalmi, A., Siefke, T., Peschel, U., Nolte, S., Zeitner, U. D., Wafer-scale nanofabrication of sub-5 nm gaps in plasmonic metasurfacesExternal link, Nanophotonics 13 (22), 4191-4202, 2024.

Junaid, S., Hofmann, J., Chemnitz, M., Blothe, M., Setzpfandt, F., Nolte, S., Schmidt, M. A., Cascaded four-wave mixing in liquid-core optical fibersExternal link, APL Photonics 9 (1), 8, 2024.

Kappe, F., Karli, Y., Wilbur, G., Krämer, R. G., Ghosh, S., Schwarz, R., Kaiser, M., Bracht, T. K., Reiter, D. E., Nolte, S., Hall, K. C., Weihs, G., Remesh, V., Chirped Pulses Meet Quantum Dots: Innovations, Challenges, and Future PerspectivesExternal link, Advanced Quantum Technologies 19, 2024.

Karli, Y., Schwarz, R., Kappe, F., Vajner, D. A., Krämer, R. G., Bracht, T. K., da Silva, S. F. C., Richter, D., Nolte, S., Rastelli, A., Reiter, D. E., Weihs, G., Heindel, T., Remesh, V., Robust single-photon generation for quantum information enabled by stimulated adiabatic rapid passageExternal link, Applied Physics Letters 125 (25), 8, 2024.

Kesorn, A., Hunkao, R., Talang, C. N., Cholsuk, C., Sinsarp, A., Vogl, T., Suwanna, S., Yuma, S., Formation energy prediction of neutral single-atom impurities in 2D materials using tree-based machine learningExternal link, Machine Learning-Science and Technology 5 (3), 18, 2024.

Koch, T., Ackermann, R., Stoecker, A., Meyer-Zedler, T., Gabler, T., Lippoldt, T., Missbach-Guentner, J., Russmann, C., Popp, J., Nolte, S., Ultrabroadband two-beam coherent anti-Stokes Raman scattering and spontaneous Raman spectroscopy of organic fluids: A comparative studyExternal link, Journal of Biophotonics 17 (9), 10, 2024.

Kumar, A., Cholsuk, C., Mishuk, M. N., Hazra, M., Pillot, C., Matthes, T., Shaik, T. A., Çakan, A., Deckert, V., Suwanna, S., Vogl, T., Comparative Study of Quantum Emitter Fabrication in Wide Bandgap Materials Using Localized Electron IrradiationExternal link, Acs Applied Optical Materials 2 (2), 323-332, 2024.

Kumar, A., Samaner, Ç, Cholsuk, C., Matthes, T., Paçal, S., Oyun, Y., Ashkan, Z., Chapman, R. J., Saerens, G., Grange, R., Suwanna, S., Ates, S., Vogl, T., Polarization Dynamics of Solid-State Quantum EmittersExternal link, ACS Nano 18 (7), 5270-5281, 2024.

Kretzschmar, T., Ritter, S., Kumar, A., Vogl, T., Eilenberger, F., Schmidt, F., Quantitative Investigation of Quantum Emitter Yield in Drop-Casted Hexagonal Boron Nitride NanoflakesExternal link, ACS Applied Optical Materials 2 (7), 1427-1435, 2024.

Lammers, K., Alberucci, A., Jisha, C. P., Szameit, A., Nolte, S., Electro-optical control of polarization in femtosecond-laser written waveguides using an embedded liquid crystal cellExternal link, Optical Materials Express 14 (4), 836-846, 2024.

Liu, D. M., Fang, Y. D., Nolte, S., Lippmann, S., Dendritic Si growth morphologies in highly undercooled Al-Si alloysExternal link, Journal of Materials Research and Technology 31 520-528, 2024.

Stoecker, A., Pinkert-Leetsch, D., Koch, T., Ackermann, R., Nolte, S., van Oterendorp, C., Russmann, C., Missbach-Guentner, J., Collagen crosslinking-induced corneal morphological changes: a three-dimensional light sheet Microscopy-based evaluationExternal link, Scientific Reports 14 (1), 10, 2024.

Talbot, L., Siems, M. P., Richter, D., David, N., Blais-Ouellette, S., Nolte, S., Bernier, M., Mid-infrared tunable filter based on a femtosecond-written silica volume Bragg gratingExternal link, Optics Letters 49 (13), 3745-3748, 2024.

Wang, J. K., Ghazagh, A., Ravi, S. S., Baumbach, S., Dannecker, B., Scharun, M., Bauer, D., Nolte, S., Flamm, D., Phase retrieval algorithm applied to high-energy ultrafast lasersExternal link, Applied Optics 63 (10), 2518-2527, 2024.

Abtahi, F., Paul, P., Beer, S., Kuppadakkath, A., Pakhomov, A., Szeghalmi, A., Nolte, S., Setzpfandt, F., Eilenberger, F., „Enhanced surface second harmonic generation in nanolaminates”, Opt. Express 31 (7), 11354-11362, 2023. http://dx.doi.org/10.1364/oe.484893External link

Alam, S., Paul, P., Beladiya, V., Schmitt, P., Stenzel, O., Trost, M., Wilbrandt, S., Mühlig, C., Schröder, S., Matthäus, G., Nolte, S., Riese, S., Otto, F., Fritz, T., Gottwald, A., Szeghalmi, A., “Heterostructure Films of SiO2 and HfO2 for High-Power Laser Optics Prepared by Plasma-Enhanced Atomic Layer Deposition”, Coatings 13 (2), 23, 2023. http://dx.doi.org/10.3390/coatings13020278External link

Chakraborty, A., Barman, P., Singh, A. K., Wu, X. F., Akimov, D. A., Meyer-Zedler, T., Nolte, S., Ronning, C., Schmitt, M., Popp, J., Huang, J. S., “Broadband Four-Wave Mixing Enhanced by Plasmonic Surface Lattice Resonance and Localized Surface Plasmon Resonance in an Azimuthally Chirped Grating”, Laser Photon. Rev. 220095, 2023. http://dx.doi.org/10.1002/lpor.202200958External link

Chambonneau, M., Li, Q. F., Blothe, M., Arumugam, S. V., Nolte, S., “Ultrafast Laser Welding of Silicon”, Adv. Photonics Res. 4 (5), 2200300, 2023. http://dx.doi.org/10.1002/adpr.202200300External link

Conlon, L. O., Vogl, T., Marciniak, C. D., Pogorelov, I., Yung, S. K., Eilenberger, F., Berry, D. W., Santana, F. S., Blatt, R., Monz, T., Lam, P. K., Assad, S. M., “Approaching optimal entangling collective measurements on quantum computing platforms”, Nat. Phys. 19 (3), 351, 2023. http://dx.doi.org/10.1038/s41567-022-01875-7External link

Jisha, C. P., Arumugam, S. V., Marrucci, L., Nolte, S., Alberucci, A., “Waveguiding driven by the Pancharatnam-Berry phase”, Phys. Rev. A 107 (1), 16, 2023. http://dx.doi.org/10.1103/PhysRevA.107.013523External link

Perevezentsev, E. A., Siems, M. P., Richter, D., Mukhin, I. B., Kraemer, R. G., Gorokhov, A. I., Volkov, M. R., Nolte, S., “First steps in the development of next-generation chirped volume Bragg gratings by means of fs laser inscription in fused silica”, Opt. Express 31 (9), 14286-14298, 2023. http://dx.doi.org/10.1364/oe.483214External link

Tünnermann, A., Momma, C., Nolte, S., “Perspective on ultrashort pulse laser micromachining”, Appl. Phys. A-Mater. Sci. Process. 129 (2), 3, 2023. http://dx.doi.org/10.1007/s00339-023-06403-9External link

Zhao, X. D., Boden, A., Nolte, S., Ackermann, R., “Spectral properties of IR-filamentation in air induced by 1 ps pulses for coherent anti-Stokes Raman scattering”, Optics Continuum 2 (4), 720-726, 2023. http://dx.doi.org/10.1364/optcon.477461External link

A. Kuppadakkath, E. Najafidehaghani, Z. Y. Gan, A. Tuniz, G. Q. Ngo, H. Knopf, F. J. F. Löchner, F. Abtahi, T. Bucher, S. Shradha, T. Käsebier, S. Palomba, N. Felde, P. Paul, T. Ullsperger, S. Schröder, A. Szeghalmi, T. Pertsch, I. Staude, U. Zeitner, A. George, A. Turchanin, F. Eilenberger, „Direct growth of monolayer MoS2 on nanostructured silicon waveguides“, Nanophotonics 11 (19), 4397-4408, 2022.  http://dx.doi.org/10.1515/nanoph-2022-0235External link

G. Q. Ngo, E. Najafidehaghani, Z. Y. Gan, S. Khazaee, M. P. Siems, A. George, E. P. Schartner, S. Nolte, H. Ebendorff-Heidepriem, T. Pertsch, A. Tuniz, M. A. Schmidt, U. Peschel, A. Turchanin, F. Eilenberger, “In-fibre second-harmonic generation with embedded two-dimensional materials”, Spectroc. Acta Pt. A-Molec. Biomolec. Spectr. 16 (11), 769, 2022. http://dx.doi.org/10.1038/s41566-022-01067-yExternal link

J. Gour, S. Beer, A. Alberucci, U. D. Zeitner, S. Nolte, “Enhancement of third harmonic generation induced by surface lattice resonances in plasmonic metasurfaces”, Opt. Lett. 47 (22), 6025-6028, 2022. http://dx.doi.org/10.1364/ol.474896External link

H. Kohl, L. Schade, G. Matthäus, T. Ullsperger, B. Yürekli, B. Seyfarth, S. Nolte, „Lasergestützte Additive Fertigung reiner Kupferbauteile unter Einsatz von Laserstrahlung im NIR-Spektralbereich“, Metall 75 (11-12), 400-402, 2022.

E. Alimohammadian, K. Lammers, A. Alberucci, G. Djogo, C. P. Jisha, S. Nolte, P. R. Herman, “Manipulating geometric and optical properties of laser-inscribed nanogratings with a conical phase front”, Opt. Express 30 (4), 5360-5375, 2022. http://dx.doi.org/10.1364/oe.437591External link

J. Ballato, U. Fotheringham, M. Hubert, S. Nolte, L. Petit, K. A. Richardson, “Celebrating Optical Glass – the International Year of Glass (2022): feature issue introduction”, Opt. Mater. Express 12 (12), 4660-4664, 2022. https://doi.org/10.1364/OME.479891External link

S. Beer, J. Gour, A. Alberucci, C. David, S. Nolte, U. D. Zeitner, “Second harmonic generation under doubly resonant lattice plasmon excitation”, Opt. Express 30 (22), 40884-40896, 2022. http://dx.doi.org/10.1364/oe.470578External link

M. Blothe, M. Chambonneau, S. Nolte, “Nanostructured back surface amorphization of silicon with picosecond laser pulses”, Appl. Phys. Lett. 121 (10), 6, 2022. http://dx.doi.org/10.1063/5.0103276External link

P. Böttner, T. Peschel, A. Brady, D. Heinig, M. Goy, R. Eberhardt, S. Nolte, “Design of a metal-based deformable mirror for orthogonal beam deflection and highly dynamic beam oscillation”, Opt. Express 30 (25), 45178-45194, 2022. https://doi.org/10.1364/OE.457364External link

Z. Y. Gan, E. Najafidehaghani, S. H. Han, S. Shradha, F. Abtahi, C. Neumann, J. Picker, T. Vogl, U. Hübner, F. Eilenberger, A. George, A. Turchanin, “Patterned Growth of Transition Metal Dichalcogenide Monolayers and Multilayers for Electronic and Optoelectronic Device Applications”, Small Methods 6 (9), 9, 2022. http://dx.doi.org/10.1002/smtd.202200300External link

A. Alberucci, C. P. Jisha, M. Monika, U. Peschel, S. Nolte, “Wave manipulation via delay-engineered periodic potentials”, Phys. Rev. Res. 4 (4), 14, 2022. http://dx.doi.org/10.1103/PhysRevResearch.4.043162External link

M. Bartnick, G. Bharathan, T. A. Goebel, R. G. Kramer, S. Nolte, C. S. Bres, “Wavelength-stabilized tunable mode-locked thulium-doped fiber laser beyond 2 mu m”, Opt. Lett. 47 (8), 2085-2088, 2022. http://dx.doi.org/10.1364/ol.453936External link

P. Böttner, A. Brady, C. Reinlein, R. Eberhardt, S. Nolte, “Design routine and characterisation of a biconic deformable metal mirror for focus shifting”, Opt. Express 29 (3), 2971-2983, 2021. http://doi.org/10.1364/oe.408748External link

Q. Li, M. Chambonneau, M. Blothe, H. Gross, S. Nolte,Flexible, fast, and benchmarked vectorial model for focused laser beams”, Appl. Optics 60 (13), 3954-3963, 2021. http://dx.doi.org/10.1364/ao.421945External link

C. P. Jisha, S. Nolte, A. Alberucci, “Geometric Phase in Optics: From Wavefront Manipulation to Waveguiding”, Laser Photon. Rev. 15, 2100003, 2021. http://dx.doi.org/10.1002/lpor.202100003External link

F. An, F. Klister, R. Ackermann, S. Guhl, A. Richter, “Heat and mass transfer analysis of a high-pressure TGA with defined gas flow for single-particle studies”, Chem. Eng. J., 411, 11, 2021. http://dx.doi.org/10.1016/j.cej.2021.128503External link

Y. Ran, A. Boden, F. Küster, F. An, A. Richter, S. Guhl, S. Nolte, R. Ackermann, “In situ investigation of carbon gasification using ultrabroadband coherent anti-Stokes Raman scattering”, Appl. Phys. Lett. 119 (24), 243905, 2021. http://dx.doi.org/10.1063/5.0074044External link

M. Chambonneau, D. Grojo, O. Tokel, F. Ö. Ilday, S. Tzortzakis, S. Nolte, “In-Volume Laser Direct Writing of Silicon-Challenges and Opportunities”, Laser Photon. Rev. 15, 2100140, 2021. http://dx.doi.org/10.1002/lpor.202100140External link

C. Gaudiuso, P. N. Terekhin, A. Volpe, S. Nolte, B. Rethfeld, A. Ancona, “Laser ablation of silicon with THz bursts of femtosecond pulses”, Scientific Reports 11 (1), 11, 2021. http://dx.doi.org/10.1038/s41598-021-92645-7External link

T. Ullsperger, Y. L. Wencke, B. Yürekli, G. Matthäus, M. Rettenmayr, G. A. Luinstra, S. Nolte, “Laser powder bed fusion of ultra-high molecular weight polyethylene (UHMWPE) using near-infrared ultrashort laser pulses”, Mater. Des. 210, 110048, 2021. http://dx.doi.org/10.1016/j.matdes.2021.110048External link

D. Liu, B. Yürekli, T. Ullsperger, G. Matthäus, L. Schade, S. Nolte, M. Rettenmayr, “Microstructural aspects of additive manufacturing of Al-Li alloys with high Li content”, Mater. Des. 198, 109323, 2021. http://dx.doi.org/10.1016/j.matdes.2020.109323External link

M. Chambonneau, Q. Li, V. Yu. Fedorov, M. Blothe, K. Schaarschmidt, M. Lorenz, S. Tzortzakis, S. Nolte, „Taming Ultrafast Laser Filaments for Optimized Semiconductor-Metal Welding“, Laser Photon. Rev. 15 (2), 2000433, 2021. http://dx.doi.org/10.1002/lpor.202000433External link

M. Chambonneau, M. Blothe, Q. Li, V. Yu. Fedorov, T. Heuermann, M. Gebhardt, C. Gaida, S. Tertelmann, F. Sotier, J. Limpert, S. Tzortzakis, S. Nolte, „Transverse ultrafast laser inscription in bulk silicon“, Phys. Rev. Res. 3, 043037, 2021. http://dx.doi.org/10.1103/PhysRevResearch.3.043037External link

K. Schaarschmidt, J. Kobelke, S. Nolte, T. Meyer, M. A. Schmidt, „Ultrafast intermodal third harmonic generation in a liquid core step-index fiber filled with C2Cl4 erratum (vol 28, pg 25037, 2020)“, Opt. Express 29 (2), 1890-1891, 2021. http://dx.doi.org/10.1364/oe.417759External link

T. Goebel, J. Nold, C. Hupel, S. Kuhn, N. Haarlammert, T. Schreiber, C. Matzdorf, T. O. Imogore, R. G. Krämer, D. Richter, A. Tünnermann, S. Nolte, „Ultrashort pulse written fiber Bragg gratings as narrowband filters in multicore fibers“, Appl. Optics 60 (19), D43-D51, 2021. http://dx.doi.org/10.1364/ao.421089External link

T. Ullsperger, D. Liu, B. Yürekli, G. Matthäus, L. Schade, B. Seyfarth, H. Kohl, R. Ramm, M. Rettenmayr, S. Nolte, “Ultra-short pulsed laser powder bed fusion of Al-Si alloys: Impact of pulse duration and energy in comparison to continuous wave excitation”, Addit. Manuf. 46, 102085, 2021. http://dx.doi.org/10.1016/j.addma.2021.102085External link

A. Alberucci, „Transverse quasi-modes in periodic potentials“, J. Phys. A: Math. Theor. 53, 135302, 2020. https://doi.org/10.1088/1751-8121/ab7522External link

A. Alberucci, N. Alasgarzadex, M. Chambonneau, M. Blothe, H. Kämmer, G. Matthäus, C.P. Jisha, S. Nolte, “In-Depth Optical Characterization of Femtosecond-Written Waveguides in Silicon”, Phys. Rev. Appl. 14 (2), 024078, 2020. http://dx.doi.org/10.1103/PhysRevApplied.14.024078External link

A. Reim, R. Ackermann, J. Font-Mateu, R. Kammel, M. Beato, S. Nolte, M. Mann, C. Russmann, M. Wierer, “Atomic-resolution mapping of transcription factor-DNA interactions by femtosecond laser crosslinking and mass spectrometry”, Nat. Commun. 11 (1), 3019, 2020. http://dx.doi.org/10.1038/s41467-020-16837-xExternal link

A. Reupert, M. Heck, S. Nolte, L. Wondraczek, “Angular Scattering Pattern of Femtosecond Laser-Induced Refractive Index Modifications in Optical Fibers”, Adv. Opt. Mater. 2000633, 2020. http://dx.doi.org/10.1002/adom.202000633External link

F. Seiboth, D. Bruckner, M. Kahnt, M. Lyubomirskiy, F. Wittwer, D. Dzhigaev, T. Ullsperger, S. Nolte, F. Koch, C. David, J. Garrevoet, G. Falkenberg, C.G. Schroer, ”Hard X-ray wavefront correction via refractive phase plates made by additive and subtractive fabrication techniques”, J. Synchrot. Radiat. 27, 1121-1130, 2020. http://dx.doi.org/10.1107/S1600577520007900External link

K. Schaarschmidt, J. Kobelke, S. Nolte, T. Meyer, M.A. Schmidt, “Ultrafast intermodal third harmonic generation in a liquid core step-index fiber filled with C2Cl4”, Opt. Express 28 (17), 25037-25047, 2020. https://dx.doi.org/10.1364/OE.399771External link

L. Talbot, D. Richter, M. Heck, S. Nolte, M. Bernier, “Femtosecond-written volume Bragg gratings in fluoride glasses”, Opt. Lett.,45 (13), 3625-3628, 2020. https://dx.doi.org/10.1364/OL.396022External link

M. Jenne, D. Flamm, K.Y. Chen, M. Schäfer, M. Kumkar, S. Nolte, “Facilitated glass separation by asymmetric Bessel-like beams”, Opt. Express 28 (5), 6552-6564, 2020. https://doi.org/10.1364/OE.387545External link

R.G. Krämer, F. Moller, C. Matzdorf, T.A. Goebel, M. Strecker, M. Heck, D. Richter, M. Plotner, T. Schreiber, A. Tünnermann, S. Nolte, “Extremely robust femtosecond written fiber Bragg gratings for an ytterbium-doped fiber oscillator with 5 kW output power”, Opt. Lett. 45 (6), 1447-1450, 2020. https://dx.doi.org/10.1364/OL.389427External link

S. Hecker, M. Blothe, D. Grossmann, T. Graf, “Process regimes during welding of glass by femtosecond laser pulse bursts”, Appl. Optics 59 (22), 6452-6458, 2020. https://doi.org/10.1364/AO.392702External link

S. Hecker, M. Blothe, T. Graf, “Reproducible process regimes during glass welding by bursts ofsubpicosecond laser pulses”, Appl. Optics 59 (36), 11382-11388, 2020. https://doi.org/10.1364/AO.411667External link

S. Junaid, K. Schaarschmidt, M. Chemnitz, M. Chambonneau, S. Nolte, M.A. Schmidt, “Tailoring modulation instabilities and four-wave mixing in dispersion-managed composite liquid-core fibers”, Opt. Express 28 (3), 3097-3106, 2020. https://doi.org/10.1364/OE.382639External link

T. A. Goebel, M. Heusinger, R. G. Krämer, C. Matzdorf, T. O. Imogore, D. Richter, U. D. Zeitner, S. Nolte, “Femtosecond inscription of semi-aperiodic multi-notch fiber Bragg gratings using a phase mask”, Opt. Express 28 (24), 35682-35694, 2020. https://doi.org/10.1364/oe.405498External link

T. O. Imogore, R. G. Krämer, T. A. Goebel, C. Matzdorf, D. Richter, S. Nolte, “Dispersion tailoring of femtosecond laser written chirped fiber Bragg gratings by selective femtosecond laser post-processing”, Opt. Lett. 45 (23), 6526-6529, 2020. https://dx.doi.org/10.1364/OL.411679External link

X.D. Zhao, S. Nolte, R. Ackermann, “Lasing of N-2(+) induced by filamentation in air as a probe for femtosecond coherent anti-Stokes Raman scattering”, Opt. Lett. 45 (13), 3661-3664, 2020. http://dx.doi.org/10.1364/OL.391989External link

Y. Ran, A. Boden, A. Richter, S. Guhl, S. Nolte, R. Ackermann, “Nonresonant signal assisted high-pressure multi-species gas concentration measurements using ultrabroadband CARS”, OSA Continuum 3 (8), 2036-2043, 2020. https://doi.org/10.1364/osac.394713External link