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 84 Results
Replication Data for: Giant enhancement in Goos-Hänchen shift at the singular phase of a nanophotonic cavity
Aug 20, 2021 - Tier 1 RG191/17
Kandammathe Valiyaveedu, Sreekanth, 2021, "Replication Data for: Giant enhancement in Goos-Hänchen shift at the singular phase of a nanophotonic cavity", https://doi.org/10.21979/N9/61WPFK, DR-NTU (Data), V1
In this letter, we experimentally demonstrate thirty-fold enhancement in Goos-Hänchen shift at the Brewster angle of a nanophotonic cavity that operates at the wavelength of 632.8 nm. In particular, the point-of-darkness and the singular phase are achieved using a four-layered me...
Replication Data for: Generalized Brewster Angle Effect in Thin-Film Optical Absorbers and Its Application for Graphene Hydrogen Sensing
Aug 10, 2021 - Tier 1 RG191/17
Kandammathe Valiyaveedu, Sreekanth, 2021, "Replication Data for: Generalized Brewster Angle Effect in Thin-Film Optical Absorbers and Its Application for Graphene Hydrogen Sensing", https://doi.org/10.21979/N9/E0CDQU, DR-NTU (Data), V1
Generalized Brewster angle (GBA) is the incidence angle at polarization by reflection for p- or s-polarized light takes place. Realizing s-polarization Brewster effect requires a material with magnetic response which is challenging at optical frequencies since the magnetic respon...
Replication Data for: High Mobility 3D Dirac Semimetal (Cd3As2) for Ultrafast Photoactive Terahertz Photonics
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...
Replication Data for: Terahertz Sensing with Optimized Q/Veff Metasurface Cavities
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...
Replication Data for: Brewster mode-enhanced sensing with hyperbolic metamaterial
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...
Replication Data for: A Terahertz Brewster Switch based on Superconductor Hyperbolic Metamaterial
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...
ASTAR_M4070314_BRENIAC(Nanyang Technological University)
Jun 23, 2021
Research data generated in the grant ASTAR_M4070314
Tier-2, MOE2017-T2-1-110(Nanyang Technological University)
Jun 15, 2021
Data generated in the Project, Tier 2- Revolutionary Perovskites Versus Silicon For Ultrafast Active Photonic Devices
Replication Data for: Spatiotemporal Dielectric Metasurfaces for Unidirectional Propagation and Reconfigurable Steering of Terahertz Beams
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...
NRF-CRP23-2019-0005(Nanyang Technological University)
Jun 15, 2021
On-chip Terahertz Topological Photonics for 6G Communication (TERACOMM)
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