34 citations · 94 across the 9 of their papers we have counts for
9 papers
Unveiling nonlinearities of electromagnetically induced transparency in a THz metamaterial
Amit Haldar, Shriganesh Prabhu, Shovon Pal
Electromagnetically induced transparency (EIT) in terahertz (THz) metamaterials relies on the coherent coupling between a radiative (bright) mode and a subradiant (dark) mode. Unde…
Phonon-polariton mediated dual electromagnetically induced transparency-like response in a THz metamaterial
Amit Haldar, Kshitij V Goyal, Ruturaj V Puranik +9
Light and matter can intertwine to create entirely new quantum states in the so-called strong-coupling regime, allowing unprecedented control over electromagnetic waves. In this wo…
Sensing with Broken Symmetry: Revisiting Bound States in the Continuum
Brijesh Kumar, Elizaveta Tsiplakova, Samuel John +6
Metasurface with bound states in the continuum (BICs) offer exceptional potential for optical sensing due to their inherently high quality (Q) factors. However, the detection of sy…
A Broadband Dipolar Resonance in THz Metamaterials
Bagvanth Reddy Sangala, Harshad Surdi, Achanta Venu Gopal +1
We demonstrate a THz metamaterial with broadband dipole resonance originating due to the hybridization of LC resonances. The structure optimized by finite element method simulation…
Carbon Irradiated SI-GaAs for Photoconductive THz Detection
Abhishek Singh, Sanjoy Pal, Harshad Surdi +5
We report here a photoconductive material for THz generation and detection with sub-picosecond carrier lifetime made by C12 (Carbon) irradiation on commercially available semi-insu…
Microlensless Interdigitated Photoconductive Terahertz Emitters
Abhishek Singh, S. S. Prabhu
We report here fabrication of interdigitated photoconductive antenna (iPCA) terahertz (THz) emitters based on plasmonic electrode design. Novel design of this iPCA enables it to wo…
Highly Efficient and Electrically Robust Carbon Irradiated SI-GaAs Based Photoconductive THz Emitters
Abhishek Singh, Sanjoy Pal, Harshad Surdi +3
We demonstrate here an efficient THz source with low electrical power consumption. We have increased the maximum THz radiation power emitted from SI-GaAs based photoconductive emit…
Physical, optical and nonlinear properties of InS single crystal
Pallavi Kushwaha, Anuradha Patra, E. Anjali +6
Indium Sulphide (InS) single crystals are successfully grown by In flux. Single crystal X-ray diffraction shows orthorhombic structure of Pnnm space group. Ellipsometry measurement…
Improved Efficiency of Photoconductive THz Emitters by Increasing the Effective Contact Length of Electrodes
Abhishek Singh, Harshad Surdi, V. V. Nikesh +2
We study the effect of a surface modification at the interface between metallic electrodes and semiconducting substrate in Semi-Insulating GaAs (SI-GaAs) based photoconductive emit…