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Manukumara Manjappa (Nanyang Technological University)

Appointment: Research Fellow

Research topics:

•Terahertz spectroscopy
•Metamaterials & plasmonics
•Quantum optics

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1 to 9 of 9 Results
Jul 22, 2021
Manjappa, Manukumara; Srivastava, Yogesh Kumar; Singh, Ranjan, 2021, "Replication Data for: Lattice-induced transparency in planar metamaterials", https://doi.org/10.21979/N9/WRJBSK, DR-NTU (Data), V1
Lattice modes are intrinsic to periodic structures and they can be easily tuned and controlled by changing the lattice constant of the structural array. Previous studies have revealed the excitation of sharp absorption resonances due to lattice mode coupling with the plasmonic re...
Jul 21, 2021
Manjappa, Manukumara; Srivastava, Yogesh Kumar; Cong, Longqing; Al-Naib, Ibraheem; Singh, Ranjan, 2021, "Replication Data for: Active Photoswitching of Sharp Fano Resonances in THz Metadevices", https://doi.org/10.21979/N9/J3YYIN, DR-NTU (Data), V1
Fano resonances offer exciting features in enhancing the non-linearity and sensing capabilities in metamaterial systems. An active photoswitching of Fano resonances in a terahertz metadevice at low optical pump powers is demonstrated, which signifies the extreme sensitivity of th...
Jul 21, 2021
Manjappa, Manukumara; Turaga, Shuvan Prashant; Srivastava, Yogesh Kumar; Bettiol, Andrew Anthony; Singh, Ranjan, 2021, "Replication Data for: Magnetic annihilation of the dark mode in a strongly coupled bright–dark terahertz metamaterial", https://doi.org/10.21979/N9/5GT6VY, DR-NTU (Data), V1
Dark mode in metamaterials has become a vital component in determining the merit of the Fano type of interference in the system. Its strength dictates the enhancement and suppression in the amplitude and 𝑄-factors of resulting resonance features. In this work, we experimentally...
Jul 21, 2021
Yahiaoui, Riad; Manjappa, Manukumara; Srivastava, Yogesh Kumar; Singh, Ranjan, 2021, "Replication Data for: Active control and switching of broadband electromagnetically induced transparency in symmetric metadevices", https://doi.org/10.21979/N9/LMVFSX, DR-NTU (Data), V1
Electromagnetically induced transparency (EIT) arises from coupling between the bright and dark mode resonances that typically involve subwavelength structures with broken symmetry, which results in an extremely sharp transparency band. Here, we demonstrate a tunable broadband EI...
Jul 21, 2021
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...
Mar 3, 2021
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...
May 5, 2020
Manjappa, Manukumara; Solanki, Solanki; Kumar, Abhishek; Sum, Tze Chien; Singh, Ranjan, 2020, "Replication data: Solution‐Processed Lead Iodide for Ultrafast All‐Optical Switching of Terahertz Photonic Devices", https://doi.org/10.21979/N9/ELRXN4, DR-NTU (Data), V2, UNF:6:Us+ae5DF/P7Hrk8nuu8U6A== [fileUNF]
Solution‐processed lead iodide (PbI2) governs the charge transport characteristics in the hybrid metal halide perovskites. Besides being a precursor in enhancing the performance of perovskite solar cells, PbI2 alone offers remarkable optical and ultrasensitive photoresponsive pro...
May 1, 2020
Manjappa, Manukumara; Srivastava, Yogesh Kumar; Solanki, Ankur; Kumar, Abhishek; Sum, Tze Chien; Singh, Ranjan, 2020, "Replication Data for: Hybrid Lead Halide Perovskites for Ultrasensitive Photoactive Switching in Terahertz Metamaterial Devices", https://doi.org/10.21979/N9/AO8EGS, DR-NTU (Data), V1, UNF:6:q64smXm5gC1Z4eiNn8MDRw== [fileUNF]
The recent meteoric rise in the field of photovoltaics with the discovery of highly efficient solar‐cell devices is inspired by solution‐processed organic–inorganic lead halide perovskites that exhibit unprecedented light‐to‐electricity conversion efficiencies. The stunning perfo...
Apr 30, 2020
Manjappa, Manukumara; Pitchappa, Prakash; Wang, Nan; Lee, Chengkuo; Singh, Ranjan, 2020, "Replication data for: Active Control of Resonant Cloaking in a Terahertz MEMS Metamaterial", https://doi.org/10.21979/N9/BGPECI, DR-NTU (Data), V1, UNF:6:/BmAcAByq+so/7RUDmwnHw== [fileUNF]
Metamaterials exhibiting exotic optical properties have played a significant role over the years in guiding the concept of invisibility cloaking from the realm of being fiction to reality. However, due to the difficulties in fabricating the 3D cloaking devices and lack of exotic pla...
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