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Ranjan Singh (Nanyang Technological University)

Appointment: Associate Professor

Research topics:

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

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1 to 10 of 54 Results
May 13, 2022 - Piyush Agarwal
Agarwal Piyush; Yang Yingshu; Lourembam James; Medwal Rohit; Battiato Marco; Singh Ranjan, 2022, "Replication Data for: Terahertz Spintronic Magnetometer (TSM)", https://doi.org/10.21979/N9/WJDQAH, DR-NTU (Data), V1
A ferromagnetic metal consists of localized electrons and conduction electrons coupled through strong exchange interaction. Together, these localized electrons contribute to the magnetization of the system, while conduction electrons lead to the formation of spin and charge curre...
Apr 21, 2022 - THz metamaterials
Wang, Wenhao; Srivastava, Yogesh Kumar; Gupta, Manoj; Wang, Zhiming; Singh, Ranjan, 2022, "Replication Data for: Photoswitchable Anapole Metasurfaces", https://doi.org/10.21979/N9/SEO9DL, DR-NTU (Data), V1, UNF:6:Z0A4LQx8OHi2AMSm8dIcVw== [fileUNF]
Nonradiating charge-current configurations have attracted attention in photonics for the efficient localization of the electromagnetic fields. Anapole mode is a unique nonradiating state of light induced by the interference of electric and toroidal dipole that possesses rich phys...
Mar 23, 2022 - THz metamaterials
Longqing, Cong; Han, Jiaguang; Zhang, Weili; Singh, Ranjan, 2022, "Replication Data for: Temporal loss boundary engineered photonic cavity", https://doi.org/10.21979/N9/EXZCGV, DR-NTU (Data), V1
Losses are ubiquitous and unavoidable in nature inhibiting the performance of most optical processes. Manipulating losses to adjust the dissipation of photons is analogous to braking a running car that is as important as populating photons via a gain medium. Here, we introduce th...
Jan 2, 2022
Kandammathe Valiyaveedu, Sreekanth, 2021, "Replication Data for: Biosensing with the singular phase of an ultrathin metal-dielectric nanophotonic cavity", https://doi.org/10.21979/N9/127YJV, DR-NTU (Data), V2
The concept of point of darkness has received much attention for biosensing based on phase-sensitive detection and perfect absorption of light. The maximum phase change is possible at the point of darkness where the reflection is almost zero. To date, this has been experimentally...
Dec 11, 2021
Kandammathe Valiyaveedu, Sreekanth, 2021, "Replication Data for: Ge2Sb2Te5-Based Tunable Perfect Absorber Cavity with Phase Singularity at Visible Frequencies", https://doi.org/10.21979/N9/RZHN4C, DR-NTU (Data), V1
The metal-dielectric stacks-based asymmetric Fabry-Perot (F-P) cavity systems have recently attracted much interest from the scientific community for realizing perfect absorption over the spectral bands from visible to infrared since they possess a lithography-free design that is...
Dec 10, 2021
Kandammathe Valiyaveedu, Sreekanth; Weiling Dong; Qingling Ouyang, 2021, "Replication Data for: Large area silver-stibnite nanoporous plasmonic films for label-free biosensing", https://doi.org/10.21979/N9/9XIRAF, DR-NTU (Data), V1
The development of various plasmonic nanoporous materials have attracted much interest in different areas of research including bioengineering and biosensing because of their large surface area and versatile porous structure. Here, we introduce a novel technique for fabricating s...
Dec 7, 2021
Sreekanth, Kandammathe Valiyaveedu; Ouyang, Qingling; Sreejith, Sivaramapanicker; Zeng, Shuwen; Lishu, Wu; Ilker, Efe; Dong, Weiling; ElKabbash, Mohamed; Ting, Yu; Lim, Chwee Teck; Hinczewski, Michael; Strangi, Giuseppe; Yong, Ken-Tye; Simpson, Robert E.; Singh, Ranjan, 2021, "Replication Data for: Phase Change Material-based Low-loss Visible Frequency Hyperbolic Metamaterials for Ultra-sensitive Label-free Biosensing", https://doi.org/10.21979/N9/JPRKXS, DR-NTU (Data), V1
Hyperbolic metamaterials (HMMs) have emerged as a burgeoning field of research over the past few years as their dispersion can be easily engineered in different spectral regions using various material combinations. Even though HMMs have comparatively low optical loss due to a sin...
Dec 7, 2021
Sreekanth, Kandammathe Valiyaveedu; Sreejith, Sivaramapanicker; Alapan, Yunus; Sitti, Metin; Lim, Chwee Teck; Singh, Ranjan, 2021, "Replication Data for: Microfluidics Integrated Lithography-Free Nanophotonic Biosensor for the Detection of Small Molecules", https://doi.org/10.21979/N9/3EU45S, DR-NTU (Data), V1
Currently, labelling techniques are mostly used to study the binding kinetics of small molecules and their detection (molecular weights <500 Daltons) at low analyte concentrations. However, the fluorescent tags used in this method for conjugation may modify or prevent the functio...
Dec 6, 2021
Sreekanth, Kandammathe Valiyaveedu; Das, Chandreyee Manas; Mishra, Mayank; Ouyang, Qingling; Rawat, Rajdeep Singh; Yong, Ken-Tye; Singh, Ranjan, 2021, "Replication Data for: Electrically tunable singular phase and Goos-Hänchen shifts in phase change material based thin-film optical absorbers", https://doi.org/10.21979/N9/V6NDY7, DR-NTU (Data), V2
The change of the phase of light under the evolution of a nanomaterial with time is a promising new research direction. A phenomenon directly related to sudden phase change of light is the Goos-Hänchen (G-H) shift, which describes the lateral beam displacement of the reflected li...
Dec 6, 2021
Sreekanth, Kandammathe Valiyaveedu; Medwal, Rohit; Das, Chandreyee Manas; Gupta, Manoj; Mishra, Mayank; Yong, Ken-Tye; Rawat, Rajdeep Singh; Singh, Ranjan, 2021, "Replication Data for: Electrically tunable all-PCM visible plasmonics", https://doi.org/10.21979/N9/4JPHRK, DR-NTU (Data), V2
Realizing electrically tunable plasmonic resonances in the ultraviolet (UV) to visible spectral band is particularly important for active nanophotonic device applications. However, the plasmonic resonances in the UV to visible wavelength range cannot be tuned due to the lack of t...
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