Appointment: Professor

Research topics:

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

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1 to 10 of 82 Results
Dec 26, 2024 - Narendra VISHWAKARMA
Premanand, Rithwik; Vishwakarma, Narendra; Singh, Ranjan; Madhukumar, A. S., 2024, "Related Data for: Multi-IRS Empowered Terahertz Wireless Communication over Generalized Fading", https://doi.org/10.21979/N9/QGSBJZ, DR-NTU (Data), V2
Intelligent reflecting surfaces (IRS) have emerged as a promising technology for addressing the inherent challenges associated with terahertz (THz) bands, thereby enhancing system performance and offering immense potential for future wireless systems. However, existing single and...
Dec 19, 2024 - Thomas TAN Caiwei
Tan, Thomas Caiwei; Wang, Kemeng; Srivastava, Yogesh Kumar; Ako, Rajour Tanyi; Bhaskaran, Madhu; Sriram, Sharath; Gu, Jianqiang; Singh, Ranjan, 2024, "Replication Data for: Nanometric Ge Films for Ultrafast Modulation of THz Waves with Flexible Metasurface", https://doi.org/10.21979/N9/5KZBBR, DR-NTU (Data), V1, UNF:6:3rAUTl8sl6YVq83zBrbYvw== [fileUNF]
Figure data for manuscript
Dec 19, 2024 - JIA Ridong
Jia, Ridong; Tan, Yi Ji; Navaratna, Nikhil; Kumar, Abhishek; Singh, Ranjan, 2024, "Related Data for: Photonic Supercoupling in Silicon Topological Waveguides", https://doi.org/10.21979/N9/N2N3DF, DR-NTU (Data), V1, UNF:6:7ln8OskQ7vFmBzYAgG+SDw== [fileUNF]
Waveguide interconnect coupling control is essential for enhancing the chip density of photonic integrated circuits to incorporate a growing number of components. However, a critical engineering challenge is to achieve both strong waveguide isolation and efficient long-range coup...
Dec 17, 2024 - Manoj GUPTA
Srivastava, Yogesh Kumar; Ietro, Pang Teng Chen; Gupta, Manoj; Manjappa, Manukumara; Agarwal, Piyush; Lesueur, Jérôme; Singh, Ranjan, 2024, "Replication Data for: The Elusive High-Tc YBa2Cu3O7 Superinductor", https://doi.org/10.21979/N9/O4MYJW, DR-NTU (Data), V1
The magnetic behavior of type-II superconductors is explained by a quantum vortex with a supercurrent encircling a coherence-length sized core. In a superconducting film with thickness t < λL, the vortex field decays slowly as 1/r2, extending to the Pearl length 𝑃𝐿=2𝜆𝐿2𝑡, kn...
Dec 2, 2024 - Narendra VISHWAKARMA
Premanand, Rithwik; Vishwakarma, Narendra; Singh, Ranjan; Madhukumar, A. S., 2024, "Related Data for: Intelligent Reflecting Surfaces-Assisted Hybrid THz/RF System Over Generalized Fading", https://doi.org/10.21979/N9/ZRTSHW, DR-NTU (Data), V1
This paper investigates a novel IRS-assisted hybrid framework that seamlessly combines both THz and radio frequency (RF) technologies using a selection combining (SC) scheme, thereby enhancing system reliability. The study incorporates the deterministic and statistical properties...
Dec 2, 2024 - Narendra VISHWAKARMA
Sharma, Shubha; Ong, Jun Siang; Madhukumar, A. S., 2024, "Related Data for: Secure transmission for MIMO THz communication system", https://doi.org/10.21979/N9/KJKSBN, DR-NTU (Data), V1
This work focuses on achieving security in the terahertz (THz) band using a MIMO wiretap channel. The source employs transmit antenna selection (TAS), while the main user and eavesdropper use maximal ratio combining (MRC) with their respective antennas. Statistical characteristic...
Dec 2, 2024 - Narendra VISHWAKARMA
Shubha, Sharma; Premanand, Rithwik; Vashistha, Ankush; Madhukumar, A. S., 2024, "Related Data for: IRS-assisted access link-based multihop THz communication", https://doi.org/10.21979/N9/N3YMHM, DR-NTU (Data), V1
This paper proposes an amplify-and-forward (AF) multihop terahertz (THz) backhaul communication system integrated with an intelligent reflecting surface (IRS)-assisted access THz link to address challenges in THz environments. The statistical analysis derives the probability dens...
Nov 29, 2024 - Narendra VISHWAKARMA
Premanand, Rithwik; Sharma, Shubha; Vishwakarma, Narendra; Singh, Ranjan; Madhukumar, A. S., 2024, "Related Data for: Intelligent Reflecting Surfaces Empowered TeraHertz Wireless Communication: System Modeling and Performance Analysis", https://doi.org/10.21979/N9/X107KJ, DR-NTU (Data), V1
MATLAB source code the publication title: "Intelligent Reflecting Surfaces Empowered TeraHertz Wireless Communication: System Modeling and Performance Analysis" These code will produce the outage probability, Bit error rate, and ergodic capacity plots for the above paper
Nov 29, 2024 - Narendra VISHWAKARMA
Premanand, Rithwik; Madhukumar, A. S.; Sharma, Shubha; Singh, Ranjan, 2024, "Related Data for: Performance Analysis of IRS-assisted Terahertz Communication System", https://doi.org/10.21979/N9/2A0HND, DR-NTU (Data), V1
In this paper, the performance of an IRS-assisted THz system, with N reflective elements, is systematically analyzed over the deterministic IRS channel gain, the THz path loss model, and the sum of independent and non-identically distributed (i.ni.d.) cascaded α−µ fading channels...
Jun 6, 2024 - MISHRA Sobhan Subhra
Mishra, Sobhan Subhra; Lourembam, James; Lin, Dennis Jing Xiong; Singh, Ranjan, 2024, "Replication Data for: Active ballistic orbital transport in Ni/Pt heterostructure", https://doi.org/10.21979/N9/FUGSDM, DR-NTU (Data), V1, UNF:6:dxyhfqPljbQpsfXuPYVaHg== [fileUNF]
Figure dataset for "Active Ballistic Orbital Transport in Ni/Pt Heterostructure"
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