Appointment: Professor

Research topics:

Development of terahertz, infrared, and optical metamaterial based active and passive plasmonic devices.

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41 to 50 of 75 Results
Jul 21, 2021 - Manukumara Manjappa
Dai, Zijie; Manjappa, Manukumara; Yang, Yunkun; Tan, Thomas Cai Wei; Qiang, Bo; Han, Song; Wong, Liang Jie; Xiu, Faxian; Liu, Weiwei; Singh, Ranjan, 2021, "Replication Data for: High Mobility 3D Dirac Semimetal (Cd3As2) for Ultrafast Photoactive Terahertz Photonics", https://doi.org/10.21979/N9/G5GIEN, DR-NTU (Data), V1
The Dirac semimetal cadmium arsenide (Cd3As2), a 3D electronic analog of graphene, has sparked renewed research interests for its novel topological phases and excellent optoelectronic properties. The gapless nature of its 3D electronic band facilitates strong optical nonlinearity...
Jul 7, 2021 - Manoj GUPTA
Gupta, Manoj; Singh, Ranjan, 2021, "Replication Data for: Terahertz Sensing with Optimized Q/Veff Metasurface Cavities", https://doi.org/10.21979/N9/SRDC9A, DR-NTU (Data), V1, UNF:6:1U/9Po6a5ClppS0honp8Jw== [fileUNF]
Confinement of electromagnetic radiation in a subwavelength cavity is an important platform for strong light–matter interaction as it enables efficient design of photonic switches, modulators, and ultrasensitive sensors. Metallic metasurfaces consist of an array of planar cavitie...
Jul 5, 2021
Kandammathe Valiyaveedu, Sreekanth; Mahalakshmi, P., 2021, "Replication Data for: Brewster mode-enhanced sensing with hyperbolic metamaterial", https://doi.org/10.21979/N9/GGL3QP, DR-NTU (Data), V1
Hyperbolic metamaterials (HMMs) have been used to demonstrate extreme sensitivity biosensing by exciting their high-k modes. However, momentum couplers such as sub-wavelength diffraction grating or bulky high-index prism is required to excite these non-radiative modes, which is n...
Jul 2, 2021
Kandammathe Valiyaveedu, Sreekanth; Mahalakshmi, P., 2021, "Replication Data for: A Terahertz Brewster Switch based on Superconductor Hyperbolic Metamaterial", https://doi.org/10.21979/N9/CIXDAO, DR-NTU (Data), V1
Active polarization switching devices are important to control the polarization state of light including terahertz (THz) waves that are technologically challenging to manipulate. Here, we propose and numerically demonstrate a hyperbolic metamaterial (HMM) based active Brewster po...
Jun 15, 2021 - THz metamaterials
Cong, Longqing; Singh, Ranjan, 2021, "Replication Data for: Spatiotemporal Dielectric Metasurfaces for Unidirectional Propagation and Reconfigurable Steering of Terahertz Beams", https://doi.org/10.21979/N9/7584ID, DR-NTU (Data), V1
Next-generation devices for low-latency and seamless communication are envisioned to revolutionize information processing, which would directly impact human lives, technologies, and societies. The ever-increasing demand for wireless data traffic can be fulfilled by the terahertz...
Jun 15, 2021 - THz metamaterials
Prakash Pitchappa; Abhishek Kumar; Saurav Prakash; Hariom Jani; Thirumalai Venkatesan; Ranjan Singh, 2021, "Related data for: Chalcogenide Phase Change Material for Active Terahertz Photonics", https://doi.org/10.21979/N9/FANBBO, DR-NTU (Data), V2
To be filled
Jun 15, 2021 - THz metamaterials
Prakash Pitchappa; Abhishek Kumar; Saurav Prakash; Hariom Jani; Rohit Medwal; Mayank Mishra; Rajdeep Singh Rawat; Thirumalai Venkatesan; Nan Wang; Ranjan Singh, 2021, "Related data for: Volatile Ultrafast Switching at Multilevel Nonvolatile States of Phase Change Material for Active Flexible Terahertz Metadevices", https://doi.org/10.21979/N9/JFJJVP, DR-NTU (Data), V2
To be filled
Jun 10, 2021 - Han Song
Song Han; Prakash Pitchappa; Wenhao Wang; Yogesh Kumar Srivastava; Mikhail V. Rybin; Ranjan Singh, 2021, "Replication Data for: Extended Bound States in the Continuum with Symmetry- Broken Terahertz Dielectric Metasurfaces", https://doi.org/10.21979/N9/81VE6S, DR-NTU (Data), V1
Excitation of the non-radiative eigenmodes in photonics and metamaterials above their light cone, that is, the bound states in the continuum (BICs), has drawn fundamental and technological interest. However, the current studies on photonic BICs are mainly restricted to the charac...
Jun 10, 2021 - QUANTUMET_ANR_NRF
Yang, Yihao; Yamagami, Yuichiro; Yu, Xiongbin; Pitchappa, Prakash; Webber, Julian; Zhang, Baile; Fujita, Masayuki; Nagatsuma, Tadao; Singh, Ranjan, 2021, "Replication Data for: Terahertz topological photonics for on-chip communication", https://doi.org/10.21979/N9/NXNIDR, DR-NTU (Data), V1
Realisation of integrated, low-cost, and efficient solutions for high-speed, on-chip communication requires terahertz waveguides and holds tremendous potential in future information and communication technologies, including terahertz wireless communication, terahertz integrated c...
Jun 10, 2021 - Han Song
Han, Song; Rybin, Mikhail V.; Pitchappa, Prakash; Srivastava, Yogesh Kumar; Kivshar, Yuri S; Singh, Ranjan, 2021, "Replication Data for: Guided-Mode Resonances in All-Dielectric Terahertz Metasurfaces", https://doi.org/10.21979/N9/E6QQAL, DR-NTU (Data), V1
Coupling of diffracted waves in gratings with the waveguide modes gives rise to the guided mode resonances (GMRs). The GMRs provide designer linewidth and resonance intensity amidst a broad background, and thus have been widely used for numerous applications in visible and infrar...
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