Rakesh Krishna

ORCID: 0000-0003-2902-0454
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Photonic and Optical Devices
  • Advanced Fiber Laser Technologies
  • Semiconductor Lasers and Optical Devices
  • Advanced Photonic Communication Systems
  • Photorefractive and Nonlinear Optics
  • Infant Development and Preterm Care
  • Optical Coatings and Gratings
  • Family and Disability Support Research
  • Cerebral Palsy and Movement Disorders
  • Silicon Nanostructures and Photoluminescence

Georgia Institute of Technology
2022-2024

In this paper, we demonstrate a novel hybrid 3C-silicon carbide-lithium niobate (3C-SiC-LN) platform for passive and active integrated nanophotonic devices enabled through wafer bonding. These are fabricated by etching the SiC layer, with optical mode power distributed between LN layers taper design. We present racetrack resonator-based electro-optic (EO) phase shifter where resonator is in while using EO-effect (r 33 ≈ 27 pm/V). The proposed demonstrates efficient resonance wavelength...

10.1364/oe.517840 article EN cc-by Optics Express 2024-03-11

In this paper, high-quality silicon nitride (SiN) devices are demonstrated for the first time in a monolithic complementary-metal-oxide-semiconductor (CMOS) photonic platform with hybrid (Si)-SiN capability. Device demonstrations include racetrack resonator quality factor (Q) ≈ 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> and coupled resonator-based wavelength filter an insertion loss of 1.78 dB extinction ratio 6.88 dB. Although...

10.1109/lpt.2024.3396622 article EN IEEE Photonics Technology Letters 2024-05-03

A new, to the best of our knowledge, device platform for tuning resonance wavelength integrated photonic resonators based on polysilicon-based micro-heaters complementary metal-oxide semiconductor (CMOS)-foundry-based active Si photonics is demonstrated. The miniaturized micro-heater can be placed directly layer, with a pedestal providing optical and electrical isolation needed implementation ultrafast devices such as modulators. demonstrated do not require any additional modifications...

10.1364/ol.441510 article EN Optics Letters 2022-01-03

Background: Cerebral Palsy is a non-Progressive neuromotor disorder which leads to various impairments and disabilities. There are evidence based Paediatric Physiotherapy approaches for rehabilitating the same. In recovery of child literature suggests that home program plays major role. Objectives; Till date there dearth in quantifies program. To provide Mother as Rehabilitative Aid Program (MARA) parents children with cerebral palsy. compare effectiveness MARA traditional Methodology:...

10.37506/ijphrd.v11i6.9813 article EN Indian Journal of Public Health Research & Development 2020-06-26

We present silicon-nitride (SiN) resonators designed in a CMOS-photonic platform which offers both electronics and photonics on the same chip. The taped-out devices provide high-quality (Q) factors of up to 10 5 .

10.1364/cleo_at.2024.aw3j.5 article EN 2024-01-01

We present a novel hybrid silicon carbide (SiC)-lithium niobate (LN) photonic platform enabled through wafer bonding of cubic 3C-SiC and LN-on-insulator (LN). On this platform, we demonstrate ring-resonators with loaded quality factors ≈ 43,096.

10.1364/cleo_at.2024.atu4m.7 article EN 2024-01-01

We demonstrate a photonic crystal resonator on hybrid silicon nitride-on-lithium niobate (SiN-on-LN) platform, designed for microwave-assisted optical-frequency conversion applications. measure large intrinsic quality factor (Q int ) of 1.47×10 5 with mode-splitting bandwidth 14.6 GHz.

10.1364/cleo_at.2024.atu4m.2 article EN 2024-01-01

An on-package optical interconnect design is proposed for the first time, with silicon photonics in conjunction polymer-on-glass interposer technology to enable heterogeneous integration. Glass substrates are used low-cost, high reliability packaging while allows high-speed modulation and wavelength division multiplexing within a small footprint. By combining silicon-photonic benzo-cyclobutene-on-glass technologies, we propose scalable photonic that can provide data rates >224 Gb / s...

10.1117/1.jnp.16.036002 article EN Journal of Nanophotonics 2022-07-09
Coming Soon ...