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Optical/Electrical Properties of Nanostructures

We have over the years on developing nanostructures for electronic/optical devices. Some of these devices include interconnects, sensors and plasmonic devices. The fundamental understanding of transport behavior in nanostructures, the interaction of nanostructures with light, opto-electronic and magneto-electronic properties of nanostructures etc., are of interest to us. We have worked on the electronic and optical properties of carbon nanotubes, graphene and other 2D atomic layers. In addition to electronic and optical properties we are also interested in solutions to problems that impact the electronics technology, such as on-chip thermal management. The following themes represent some of our ongoing interest in electronic and optical properties of nanostructures.


M. Razanoelina, F. R. Bagsican, I. Kawayama, X. Zhang, L. Ma, H. Murakami, R. Vajtai, P. M. Ajayan, J. Kono, M. Tonouchi, “Probing low-density carriers in a single atomic layer using terahertz parallel-plate waveguides,” Optics Express 24 (4): 3885-3893 (2016). Read Article

S. Deckoff-Jones, J. Zhang, C. E. Petoukhoff, M. K. L. Man, S. Lei, R. Vajtai, P. M. Ajayan, D. Talbayev, J. Madéo, K. M. Dani, “Observing the interplay between surface and bulk optical nonlinearities in thin van der Waals crystals,” Scientific Reports 6: 22620 (2016). Read Article

B. Li, G. Shi, S. Lei, Y. He, W. Gao, Y. Gong, G. Ye, W. Zhou, K. Keyshar, J. Hao, P. Dong, L. Ge, J. Lou, J. Kono, R. Vajtai, P.M. Ajayan, “3D Band Diagram and Photoexcitation of 2D-3D Semiconductor Heterojunctions”, Nano Letters 15(9): 5919-5925 (2015). Read Article

Q. Liu, X. Li, Z. Xiao, Y. Zhou, H. Chen, A. Khalil, T. Xiang, J. Xu, W. Chu, X. Wu, J. Yang, C. Wang, Y. Xiong, C. Jin, P.M. Ajayan, L. Song, “Stable Metallic 1T-WS2 Nanoribbons Intercalated with Ammonia Ions: The Correlation between Structure and Electrical/Optical Properties”, Advanced Materials 27(33): 4837-4844 (2015). Read Article

S. Lei, F. Wen, B. Li, Q. Wang, Y. Huang, Y. Gong, Y. He, P. Dong, J. Bellah, A. George, L. Ge, J. Lou, N. J. Halas, R. Vajtai, P. M. Ajayan, “Optoelectronic Memory Using Two-Dimensional Materials”, Nano Letters 15(1), 259-265 (2015). Read Article

S. Lei, A.Sobhani, F. Wen, A. George, Q. Wang, Y. Huang, P. Dong, B. Li, S. Najmaei, J. Bellah, G. Gupta, A. D. Mohite, L. Ge, J. Lou, N. J. Halas, R. Vajtai, P. M. Ajayan, “Ternary CuIn7Se11: Towards Ultra-Thin Layered Photodetectors and Photovoltaic Devices”, Advanced Materials 26 (45) 7666-7672 (2014). Read Article

C. Qiu, W. Gao, R. Vajtai, P. M. Ajayan, J. Kono, Q. Xu, “Efficient Modulation of 1.55 mu m Radiation with Gated Graphene on a Silicon Microring Resonator”, Nano Letters 14(12), 6811-6815 (2014). Read Article

S. D. Lei, L. H. Ge, S. Najmaei, A. George, R. Kappera, J. Lou, M. Chhowalla, H. Yamaguchi, G. Gupta, R. Vajtai, A. D. Mohite, P. M. Ajayan, “Evolution of the Electronic Band Structure and Efficient Photo-Detection in Atomic Layers of InSe”, ACS Nano 8, 1263-1272 (2014). Read Article

S. D. Lei, L. H. Ge, Z. Liu, S. Najmaei, G. Shi, G. You, J. Lou, R. Vajtai, and P. M. Ajayan, “Synthesis and Photoresponse of Large GaSe Atomic Layers”, Nano Letters, 13(6), 2777-2781 (2013). Read Article

F. Yavari, E. Castillo, H. Gullapalli, P. M. Ajayan, and N. Koratkar, “High Sensitivity Detection of NO2 and NH3 in Air Using Chemical Vapor Deposition Grown Graphene”, Applied Physics Letters, 100(20)(2012). Read Article

R. K. Srivastava, S. Srivastava, T. N. Narayanan, B. D. Mahlotra, R. Vajtai, P. M. Ajayan, and A. Srivastava, “Functionalized Multilayered Graphene Platform for Urea Sensor”, Acs Nano, 6(1), 168-175 (2012). Read Article

L. Song, L. Balicas, D. J. Mowbray, R. B. Capaz, K. Storr, L. Ci, D. Jariwala, S. Kurth, S. G. Louie, A. Rubio, and P. M. Ajayan, “Anomalous Insulator-Metal Transition in Boron Nitride-Graphene Hybrid Atomic Layers”, Physical Review B, 86(7)(2012). Read Article