Vankatraman Gopalan's research focuses on the science and technology of nonlinear optical materials. The work straddles materials science, physics, and optical engineering. There are three current areas of focus: complex oxides, semiconductor fibers and metalattices, and symmetry. Technology impacted by Gopalan's research includes:
- Multiferroics enable electrical control of magnetic devices, and vice versa, and dual electrical-magnetic storage media
- Nonlinear optical devices are targeted for optical communications and infrared applications
- The vision of hybrid semiconductor-metal-silica structures is all-fiber optoelectronics, where light generation, modulation and detection can be performed within a fiber
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Recent Publications
Chemically-Disordered Transparent Conductive Perovskites With High Crystalline Fidelity
Almishal, S. S. I., Kezer, P., Sivak, J. T., Iwabuchi, Y., Ayyagari, S. V. G., Sarker, S., Furst, M., Bejger, G., Yang, B., Gelin, S., Alem, N., Dabo, I., Rost, C. M., Sinnott, S. B., Crespi, V., Gopalan, V., Engel-Herbert, R., Heron, J. T. & Maria, J. P., 2025, (Accepted/In press) In: Advanced Science.Research output: Contribution to journal › Article › peer-review
LionGlass™: A low-melting, carbonate-free alternative to soda lime silicate glass
Clark, N. L., Mancini, M., Akman-Ozay, E. P., Ozay, M. A., Astle, S. R., Becerra, S. M., Gallagher, C., Suceava, A. C., Claireaux, C., Verheijen, O., Engelmann, T., Prange, A., Roos, C., Cook, G. B., Gopalan, V. & Mauro, J. C., Dec 2025, In: Journal of the American Ceramic Society. 108, 12, e70163.Research output: Contribution to journal › Article › peer-review
Discovery of a layered multiferroic compound Cu1−xMn1+ySiTe3 with strong magnetoelectric coupling
De, C., Liu, Y., Ayyagari, S. V. G., Zheng, B., Kelley, K. P., Hazra, S., He, J., Pawledzio, S., Mali, S., Guchhait, S., Yoshida, S., Guan, Y., Lee, S. H., Sretenovic, M., Ke, X., Wang, L., Engelhard, M. H., Du, Y., Xie, W. & Wang, X. & 5 others, , Jan 3 2025, In: Science Advances. 11, 1, eadp9379.Research output: Contribution to journal › Article › peer-review
Thermodynamic Theory of Proximity Ferroelectricity
Eliseev, E. A., Morozovska, A. N., Maria, J. P., Chen, L.-Q. & Gopalan, V., Apr 2025, In: Physical Review X. 15, 2, 021058.Research output: Contribution to journal › Article › peer-review
Mixed 1D/0D Structures of Chiral Hybrid Lead Halides with an l-Nicotinium Spacer Exhibit Broadband Photoluminescence and Polarized Emission
Fletcher, J. D., Nag, J., Yazdaanpanah, R., Sarker, S., Kulkarni, S., Gilley, I. W., Aydin, K., Gopalan, V. & Kanatzidis, M. G., Mar 12 2025, In: Journal of the American Chemical Society. 147, 10, p. 8820-8831 12 p.Research output: Contribution to journal › Article › peer-review
Strain-induced lead-free morphotropic phase boundary
Ghanbari, R., KP, H., Patel, K., Zhou, H., Zhou, T., Liu, R., Wu, L., Khandelwal, A., Crust, K. J., Hazra, S., Carroll, J., Meyers, C. J. G., Wang, J., Prosandeev, S., Qiao, H., Kim, Y. H., Nabei, Y., Chi, M., Sun, D. & Balke, N. & 7 others, , Dec 2025, In: Nature communications. 16, 1, 7766.Research output: Contribution to journal › Article › peer-review
Interplay between Two Structure Types in the Incommensurately Modulated A14+2/3Ta8Se46+2/3 Compounds (A = Rb, Cs)
Ie, T. S., Balvanz, A., Malliakas, C. D., Nag, J., Sarker, S., Marmer, A., Gopalan, V. & Kanatzidis, M. G., Feb 10 2025, In: Inorganic chemistry. 64, 5, p. 2403-2414 12 p.Research output: Contribution to journal › Article › peer-review
Single-Crystal Growth and Characterization of High-Entropy Phosphides ASiP2
Iwabuchi, Y., Xu, M., Xie, W., Oyon, S. A., Henry, J., Gopalan, V. & Mao, Z., Aug 11 2025, In: Inorganic chemistry. 64, 31, p. 15905-15913 9 p.Research output: Contribution to journal › Article › peer-review
Realization of Non-Equilibrium Wurtzite Structure in Heterovalent Ternary MgSiN2 Film Grown by Reactive Sputtering
Kageyama, S., Okamoto, K., Yasuoka, S., Ide, K., Hanzawa, K., Hiranaga, Y., Hsieh, P., Hazra, S., Suceava, A., Saha, A., Yokota, H., Shigematsu, K., Azuma, M., Gopalan, V., Uchida, H., Hiramatsu, H. & Funakubo, H., Jun 2025, In: Advanced Electronic Materials. 11, 9, 2400880.Research output: Contribution to journal › Article › peer-review
Discovery of an Intrinsic Antiferromagnetic Semiconductor EuSc2Te4 With Magnetism-Driven Nonlinear Transport
Lee, S. H., Zhao, Y., Gluscevich, N., Yi, H., Morgan, Z., Cao, H., Koo, J., Wang, Y., He, J., Gopalan, V., Wang, Y., Xie, W., Chang, C. Z., Zhang, Q., Yan, B. & Mao, Z., Aug 8 2025, In: Advanced Functional Materials. 35, 32, 2424231.Research output: Contribution to journal › Article › peer-review
Evidence for In-Plane Electrical Polarization in 3R-ß’-In2Se3 Thin Films Grown by Molecular Beam Epitaxy
Liu, D. S. H., Calderon, S., Jacques, L., Yao, J., Suceava, A. C., Fazlioglu-Yalcin, B., Li, M., Young, J., Auker, W., Law, S., Engel-Herbert, R., Gopalan, V., Liu, Y., Trolier-McKinstry, S., Dickey, E. C., Redwing, J. M. & Hilse, M., Jun 18 2025, In: ACS Applied Materials and Interfaces. 17, 24, p. 35661-35672 12 p.Research output: Contribution to journal › Article › peer-review
Hidden domain boundary dynamics toward crystalline perfection
Mangu, A., Stoica, V. A., Zheng, H., Yang, T., Zhang, M., Wang, H., Zu, R., Nguyen, Q. L., Song, S., Das, S., Meisenheimer, P., Donoway, E., Chollet, M., Sun, Y., Turner, J. J., Freeland, J. W., Wen, H., Martin, L. W., Chen, L. Q. & Gopalan, V. & 3 others, , Jan 14 2025, In: Proceedings of the National Academy of Sciences of the United States of America. 122, 2, e2407772122.Research output: Contribution to journal › Article › peer-review
The influence of electric field on the anisotropic dispersion of the flexocoupling induced phonons and ferrons in van der Waals ferrielectrics
Morozovska, A. N., Eliseev, E. A., Zhu, Y., Vysochanskii, Y. M., Gopalan, V., Chen, L.-Q. & Hu, J., Oct 7 2025, In: Journal of Applied Physics. 138, 13, 134101.Research output: Contribution to journal › Article › peer-review
Large Non-Resonant Infrared Optical Second Harmonic Generation in Bulk Crystals of Van der Waals Semiconductor, SnP2Se6
Nag, J., Sarker, S., Imam, S., Iyer, A., Waters, M. J., Suceava, A., Rondinelli, J. M., Kanatzidis, M. G. & Gopalan, V., Mar 21 2025, In: Advanced Optical Materials. 13, 9, 2402649.Research output: Contribution to journal › Article › peer-review
Symmetry over Chemistry: Harmonic Generation of Low-Dimensional Alkali Chalcopnictates RbMP2S6 (M = Sb, Bi)
Oxley, B. M., Lim, J. H., Lee, K. H., Cho, J. B., Sarker, S., Nag, J., Waters, M. J., Rondinelli, J. M., Gopalan, V., Jang, J. I. & Kanatzidis, M. G., Apr 8 2025, In: Chemistry of Materials. 37, 7, p. 2592-2602 11 p.Research output: Contribution to journal › Article › peer-review