52 citations · 62 across the 3 of their papers we have counts for
4 papers
Dielectric cross-shaped resonator based metasurface for vortex beam generation in Mid-IR and THz wavelengths
Raghu Dharmavarapu, Ken-ichi Izumi, Ikufumi Katayama +7
Metasurfaces are engineered thin surfaces comprising two dimensional (2D) arrays of sub-wavelength spaced and sub-wavelength sized resonators. Metasurfaces can locally manipulate t…
GDoeSII: Open source software for design of diffractive optical elements and conversion to GDSII lithography files
Raghu Dharmavarapu, Shanti Bhattacharya, Saulius Juodkazis
We develop an open source software "GDoeSII" for the simulation of Fresnel (near field) and Fraunhofer (far field) diffraction integrals of diffractive optical elements (DOE). It c…
All-dielectric metasurface for wavefront control at terahertz frequencies
Raghu Dharmavarapu, Soon Hock Ng, Shanti Bhattacharya +1
Recently, metasurfaces have gained popularity due to their ability to offer a spatially varying phase response, low intrinsic losses and high transmittance. Here, we demonstrate nu…
Engineering the axial intensity of Bessel beams
Raghu Dharmavarapu, Saulius Juodkazis, Shanti Bhattacharya
Bessel beams (BBs) appear immune to diffraction over finite propagation distances due to the conical nature of light propagation along the optical axis. This offers promising advan…