6篇
您的检索式：作者名="Barun Gupta"
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| 1 | Self-referenced measurements of the dielectric properties of metals using terahertz time-domain spectroscopy via the excitation of surface plasmon-polaritons显示文摘We present experimental measurements that show direct determination of the dielectric properties of various metals relevant to plasmonics.In contrast to traditional measurements that typically rely on transmission and reflectance measurements,we launch surface plasmon-polaritons on a variety of different substrates and measure the propagation properties using terahertz time-domain spectroscopy.Surprisingly,we find that the extracted values for the dielectric constant for these metals differ by orders of magnitude from published data.In order to validate the obtained results,we separately measure the 1∕e decay length,both along the propagation direction and normal to the metal surface,and show that the results are fully self-consistent with experimental data.The generality of the measurement technique makes it a useful tool to estimate the properties not only of planar conducting substrates but also a wide variety of more complex plasmonic structures. | Shashank Pandey Shuchang Liu Barun Gupta Ajay Nahata | 2013 | Photonics Research2013，1，4： | 2 |
| 2 | Oxyfluorination of Wood-Fiber Reinforced Thermoplastic Composites to Improve Adhesion 显示文摘 | Laborie Marie-Pierre G Gupta Barun | 2008 | The Journal of Adhesion2008，84，10： | 1 |
| 3 | Surface properties and adhesion of wood fiber reinforced thermoplastic composites显示文摘 | Barun S Gupta Isabela Reiniati Marie-Pierre G Laborie | 2007 | Colloids and Surface A2007，302，13： | 1 |
| 4 | Oxyfluorination of wood-fiber reinforced thermoplastic composites to improve adhesion显示文摘 | Marie-Pierre G Laborie Barun Gupta | 2008 | TheJournal of Adhesion2008，84，10： | 1 |
| 5 | Benthic foraminifera of bathyal hydrocarbon vents of the Gulf of Mexico: Initial report on communities and stable isotopes显示文摘 | Barun K. Sen Gupta Paul Aharon | 1994 | Geo - Marine Letters (-)1994，，2： | 1 |
| 6 | Direct observation of Anderson localization in plasmonic terahertz devices显示文摘We present the first experimental observation of Anderson localization in the terahertz frequency range using plasmonic structures.To accomplish this goal,we designed THz waveguides consisting of a one-dimensional array of rectangular apertures that were fabricated in a freestanding metal foil.Disorder is introduced into the waveguide by offsetting the position of each aperture by a random distance within a prescribed range.For example,for a waveguide with apertures spaced by 250μm in a periodic waveguide,10%disorder would correspond to the apertures being shifted by a random value between±25μm along the waveguide axis.We find that for disorder levels below 25%,there is only an increase in the propagation loss along the device.However,for two specific waveguides with 25%disorder,we observe a spatially localized mode that lies just within the stop band of the device and exhibits a double-sided exponential spatial decay away from the maximum. | Shashank Pandey Barun Gupta Sushil Mujumdar Ajay Nahata | 2016 | Light(Science & Applications)2016，5，1： | 0 |
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