Ranjan SINGH

Appointment: Professor

Research topics:

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

ASTAR_M4070314_BRENIAC

NRF-CRP23-2019-0005

QUANTUMET_ANR_NRF

T2EP50121-0017 (MOE Tier 2)

THz metamaterials

Tier 1 RG191/17

Tier 1 RG96/19

Tier-2, MOE2017-T2-1-110

TRIM_M22L1b0110

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61 to 70 of 84 Results

QUANTUMET_ANR_NRF(Nanyang Technological University) Jun 10, 2021
Replication Data for: Ultrafast Photo-Thermal Switching of Terahertz Spin Currents Jun 1, 2021 - Piyush AGARWAL Agarwal, Piyush; Medwal, Rohit; Kumar, Abhishek; Asada, Hironori; Fukuma, Yasuhiro; Rawat, Rajdeep Singh; Battiato, Marco; Singh, Ranjan, 2021, "Replication Data for: Ultrafast Photo-Thermal Switching of Terahertz Spin Currents", https://doi.org/10.21979/N9/Y5VUPE, DR-NTU (Data), V1 Dissipationless and scattering-free spin-based terahertz electronics is the futuristic technology for energy-efficient information processing. Femtosecond light pulse provides an ideal pathway for exciting the ferromagnet (FM) out-of-equilibrium, causing ultrafast demagnetization...
Replication Data for: A metamaterial analog of the ising model Mar 8, 2021 - THz metamaterials Cong, Longqing; Singh, Ranjan, 2021, "Replication Data for: A metamaterial analog of the ising model", https://doi.org/10.21979/N9/ZMPLSH, DR-NTU (Data), V1 The interaction between microscopic particles has always been a fascinating and intriguing area of science. Direct interrogation of such interactions is often difficult. Structured electromagnetic systems offer a rich toolkit for mimicking and reproducing the key dynamics that go...
Replication Data for: Electrically programmable terahertz diatomic metamolecules for chiral optical control Mar 8, 2021 - THz metamaterials Cong, Longqing; Singh, Ranjan, 2021, "Replication Data for: Electrically programmable terahertz diatomic metamolecules for chiral optical control", https://doi.org/10.21979/N9/ER0KRH, DR-NTU (Data), V1 Optical chirality is central to many industrial photonic technologies including enantiomer identification, ellipsometry-based tomography and spin multiplexing in optical communications. However, a substantial chiral response requires a three-dimensional constituent, thereby makin...
Replication Data for: Symmetry-protected dual bound states in the continuum in metamaterials Mar 8, 2021 - THz metamaterials Cong, Longqing; Singh, Ranjan, 2021, "Replication Data for: Symmetry-protected dual bound states in the continuum in metamaterials", https://doi.org/10.21979/N9/ZUUGII, DR-NTU (Data), V1 Bound state in the continuum (BIC) is a mathematical concept with an infinite radiative quality factor (Q) that exists only in an ideal infinite array of resonators. In photonics, it is essential to achieve high Q resonances for enhanced light-mater interactions that could enable...
Replication Data for: Reconfigurable MEMS Fano metasurfaces with multiple-input-output states for logic operations at terahertz frequencies Mar 3, 2021 - Manukumara Manjappa Manjappa, Manukumara; Pitchappa, Prakash; Singh, Navab; Wang, Nan; Zheludev, Nikolay I.; Lee, Chengkuo; Singh, Ranjan, 2021, "Replication Data for: Reconfigurable MEMS Fano metasurfaces with multiple-input-output states for logic operations at terahertz frequencies", https://doi.org/10.21979/N9/XZATO7, DR-NTU (Data), V1, UNF:6:I6/Wbbi7GhGtLQPuFCjVsA== [fileUNF] A broad range of dynamic metasurfaces has been developed for manipulating the intensity, phase and wavefront of electromagnetic radiation from microwaves to optical frequencies. However, most of these metasurfaces operate in single-input-output state. Here, we experimentally demo...
Replication Data for: Strong Self-trapping by Deformation Potential Limits Photovoltaic Performance in Bismuth Double Perovskite Feb 18, 2021 - FU Jianhui Fu, Jianhui, 2021, "Replication Data for: Strong Self-trapping by Deformation Potential Limits Photovoltaic Performance in Bismuth Double Perovskite", https://doi.org/10.21979/N9/LTPBM2, DR-NTU (Data), V1 Replication data for the paper including the raw data, processed data and figures. DOI: Sci. Adv. 2021; 7 : eabd3160
THz metamaterials(Nanyang Technological University) Jan 29, 2021
Replication Data for: Impact of conductivity on Lorentzian and Fano resonant high-Q THz metamaterials: Superconductor, metal and perfect electric conductor May 15, 2020 - Yogesh Kumar Srivastava Srivastava, Yogesh Kumar; Singh, Ranjan, 2020, "Replication Data for: Impact of conductivity on Lorentzian and Fano resonant high-Q THz metamaterials: Superconductor, metal and perfect electric conductor", https://doi.org/10.21979/N9/AWKV0V, DR-NTU (Data), V1 High temperature superconductors have created exciting opportunities for switchable metamaterial and plasmonic devices operating at terahertz frequencies. In recent times, there have been several demonstrations using superconducting metamaterials, such as thermal, electrical, mag...
Replication Data for: Terahertz sensing of 7 nm dielectric film with bound states in the continuum metasurfaces May 14, 2020 - Yogesh Kumar Srivastava Srivastava, Yogesh Kumar; Ako, Rajour Tanyi; Gupta, Manoj; Bhaskaran, Madhu; Sriram, Sharath; Singh, Ranjan, 2020, "Replication Data for: Terahertz sensing of 7 nm dielectric film with bound states in the continuum metasurfaces", https://doi.org/10.21979/N9/45EWUQ, DR-NTU (Data), V1 The fingerprint spectral response of several materials with terahertz electromagnetic radiation indicates that terahertz technology is an effective tool for sensing applications. However, sensing few nanometer thin-films of dielectrics with much longer terahertz waves (1 THz = 0....

QUANTUMET_ANR_NRF(Nanyang Technological University)

Jun 10, 2021

Replication Data for: Ultrafast Photo-Thermal Switching of Terahertz Spin Currents

Jun 1, 2021 - Piyush AGARWAL

Agarwal, Piyush; Medwal, Rohit; Kumar, Abhishek; Asada, Hironori; Fukuma, Yasuhiro; Rawat, Rajdeep Singh; Battiato, Marco; Singh, Ranjan, 2021, "Replication Data for: Ultrafast Photo-Thermal Switching of Terahertz Spin Currents", https://doi.org/10.21979/N9/Y5VUPE, DR-NTU (Data), V1

Dissipationless and scattering-free spin-based terahertz electronics is the futuristic technology for energy-efficient information processing. Femtosecond light pulse provides an ideal pathway for exciting the ferromagnet (FM) out-of-equilibrium, causing ultrafast demagnetization...

Replication Data for: A metamaterial analog of the ising model

Mar 8, 2021 - THz metamaterials

Cong, Longqing; Singh, Ranjan, 2021, "Replication Data for: A metamaterial analog of the ising model", https://doi.org/10.21979/N9/ZMPLSH, DR-NTU (Data), V1

The interaction between microscopic particles has always been a fascinating and intriguing area of science. Direct interrogation of such interactions is often difficult. Structured electromagnetic systems offer a rich toolkit for mimicking and reproducing the key dynamics that go...

Replication Data for: Electrically programmable terahertz diatomic metamolecules for chiral optical control

Mar 8, 2021 - THz metamaterials

Cong, Longqing; Singh, Ranjan, 2021, "Replication Data for: Electrically programmable terahertz diatomic metamolecules for chiral optical control", https://doi.org/10.21979/N9/ER0KRH, DR-NTU (Data), V1

Optical chirality is central to many industrial photonic technologies including enantiomer identification, ellipsometry-based tomography and spin multiplexing in optical communications. However, a substantial chiral response requires a three-dimensional constituent, thereby makin...

Replication Data for: Symmetry-protected dual bound states in the continuum in metamaterials

Mar 8, 2021 - THz metamaterials

Cong, Longqing; Singh, Ranjan, 2021, "Replication Data for: Symmetry-protected dual bound states in the continuum in metamaterials", https://doi.org/10.21979/N9/ZUUGII, DR-NTU (Data), V1

Bound state in the continuum (BIC) is a mathematical concept with an infinite radiative quality factor (Q) that exists only in an ideal infinite array of resonators. In photonics, it is essential to achieve high Q resonances for enhanced light-mater interactions that could enable...

Replication Data for: Reconfigurable MEMS Fano metasurfaces with multiple-input-output states for logic operations at terahertz frequencies

Mar 3, 2021 - Manukumara Manjappa

Manjappa, Manukumara; Pitchappa, Prakash; Singh, Navab; Wang, Nan; Zheludev, Nikolay I.; Lee, Chengkuo; Singh, Ranjan, 2021, "Replication Data for: Reconfigurable MEMS Fano metasurfaces with multiple-input-output states for logic operations at terahertz frequencies", https://doi.org/10.21979/N9/XZATO7, DR-NTU (Data), V1, UNF:6:I6/Wbbi7GhGtLQPuFCjVsA== [fileUNF]

A broad range of dynamic metasurfaces has been developed for manipulating the intensity, phase and wavefront of electromagnetic radiation from microwaves to optical frequencies. However, most of these metasurfaces operate in single-input-output state. Here, we experimentally demo...

Replication Data for: Strong Self-trapping by Deformation Potential Limits Photovoltaic Performance in Bismuth Double Perovskite

Feb 18, 2021 - FU Jianhui

Fu, Jianhui, 2021, "Replication Data for: Strong Self-trapping by Deformation Potential Limits Photovoltaic Performance in Bismuth Double Perovskite", https://doi.org/10.21979/N9/LTPBM2, DR-NTU (Data), V1

Replication data for the paper including the raw data, processed data and figures. DOI: Sci. Adv. 2021; 7 : eabd3160

THz metamaterials(Nanyang Technological University)

Jan 29, 2021

Replication Data for: Impact of conductivity on Lorentzian and Fano resonant high-Q THz metamaterials: Superconductor, metal and perfect electric conductor

May 15, 2020 - Yogesh Kumar Srivastava

Srivastava, Yogesh Kumar; Singh, Ranjan, 2020, "Replication Data for: Impact of conductivity on Lorentzian and Fano resonant high-Q THz metamaterials: Superconductor, metal and perfect electric conductor", https://doi.org/10.21979/N9/AWKV0V, DR-NTU (Data), V1

High temperature superconductors have created exciting opportunities for switchable metamaterial and plasmonic devices operating at terahertz frequencies. In recent times, there have been several demonstrations using superconducting metamaterials, such as thermal, electrical, mag...

Replication Data for: Terahertz sensing of 7 nm dielectric film with bound states in the continuum metasurfaces

May 14, 2020 - Yogesh Kumar Srivastava

Srivastava, Yogesh Kumar; Ako, Rajour Tanyi; Gupta, Manoj; Bhaskaran, Madhu; Sriram, Sharath; Singh, Ranjan, 2020, "Replication Data for: Terahertz sensing of 7 nm dielectric film with bound states in the continuum metasurfaces", https://doi.org/10.21979/N9/45EWUQ, DR-NTU (Data), V1

The fingerprint spectral response of several materials with terahertz electromagnetic radiation indicates that terahertz technology is an effective tool for sensing applications. However, sensing few nanometer thin-films of dielectrics with much longer terahertz waves (1 THz = 0....

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