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- Publications
- Influence
Role of nanoparticles in wavelength selectivity of multilayered structures in the far-field and near-field regimes.
- Alok Ghanekar, L. Lin, Junwei Su, H. Sun, Y. Zheng
- Materials Science, Medicine
- Optics express
- 21 September 2015
Microscopic thin films have shown wavelength selectivity in the context of radiative heat transfer. We propose a methodology to shift the wavelength selectivity in the desired location. This work… Expand
High-rectification near-field thermal diode using phase change periodic nanostructure
- Alok Ghanekar, J. Ji, Yi Zheng
- Materials Science
- 22 September 2016
We theoretically demonstrate workings of a near-field thermal rectification device that uses a phase change material to achieve asymmetry in radiative heat transfer. We exploit the temperature… Expand
Novel and efficient Mie-metamaterial thermal emitter for thermophotovoltaic systems.
- Alok Ghanekar, L. Lin, Yi Zheng
- Materials Science, Medicine
- Optics express
- 16 May 2016
We theoretically demonstrate a novel, efficient and cost effective thermal emitter using a Mie-resonance metamaterial for thermophotovoltaic (TPV) applications. We propose for the first time the… Expand
Radiative energy and momentum transfer for various spherical shapes: A single sphere, a bubble, a spherical shell, and a coated sphere
- Y. Zheng, Alok Ghanekar
- Physics
- 15 October 2014
We use fluctuational electrodynamics to determine spectral emissivity and van der Waals contribution to surface energy for various spherical shapes, such as a sphere, a bubble, a spherical shell, and… Expand
Near-field thermal rectification devices using phase change periodic nanostructure.
- Alok Ghanekar, Y. Tian, Matthew Ricci, Sinong Zhang, O. Gregory, Y. Zheng
- Materials Science, Medicine
- Optics express
- 22 January 2018
We theoretically analyze two near-field thermal rectification devices: a radiative thermal diode and a thermal transistor that utilize a phase change material to achieve dynamic control over heat… Expand
Mie-Metamaterials-Based Thermal Emitter for Near-Field Thermophotovoltaic Systems
- Alok Ghanekar, Y. Tian, Sinong Zhang, Y. Cui, Yi Zheng
- Materials Science, Medicine
- Materials
- 31 July 2017
In this work, we theoretically analyze the performance characteristics of a near-field thermophotovoltaic system consisting a Mie-metamaterial emitter and GaSb-based photovoltaic cell at separations… Expand
Dynamic optical response of SU-8 upon UV treatment.
- Alok Ghanekar, M. Ricci, Y. Tian, O. Gregory, Yi Zheng
- Materials Science, Medicine
- Optical materials express
- 1 July 2018
We report the optical properties of SU-8 in the mid-infrared (mid-IR) region before and after UV treatment. Samples consisted of SU-8 films of thickness ranging from 10 um to 157 um deposited on gold… Expand
Strain-induced modulation of near-field radiative transfer.
- Alok Ghanekar, M. Ricci, Y. Tian, O. Gregory, Y. Zheng
- Materials Science, Medicine
- Applied physics letters
- 11 June 2018
In this theoretical study, we present a near-field thermal modulator that exhibits change in radiative heat transfer when subjected to mechanical stress/strain. The device has two terminals at… Expand
Optimal Design of Wavelength Selective Thermal Emitter for Thermophotovoltaic Applications.
- Alok Ghanekar, M. Sun, Z. Zhang, Y. Zheng
- Materials Science, Medicine
- Journal of thermal science and engineering…
- 1 February 2018
We theoretically and numerically demonstrate optimal design of wavelength selective thermal emitter using one-dimensional (1D) and two-dimensional (2D) metal-dielectric gratings for… Expand
A Review of Tunable Wavelength Selectivity of Metamaterials in Near-Field and Far-Field Radiative Thermal Transport
- Y. Tian, Alok Ghanekar, M. Ricci, M. Hyde, O. Gregory, Y. Zheng
- Materials Science, Medicine
- Materials
- 1 May 2018
Radiative thermal transport of metamaterials has begun to play a significant role in thermal science and has great engineering applications. When the key features of structures become comparable to… Expand