Sputtering Al2O3 enhanced bandgap engineering for integrated photonic devices

Mohammad Kaleem*, Sajid Nazir, Shaista Jabeen, Hamid Turab Mirza, Shahrukh Agha, Aadil Raza

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Downloads (Pure)

Abstract

We present experimental results of the application of Sputtering enhanced Quantum Well Intermixing (QWI) process, where the bandgap of InGaAsP/InP quantum well laser microstructure is effectively modified by intermixing quantum well and potential
barrier layers through sputtering Al2O3-QWI. This technique creates point defects through plasma induced disordering in the process of sputtering Al2O3. The subsequent Rapid thermal Anneal (RTA) process is performed to increase the diffusion rate and quantum well intermixing. This results in an increased transitional energy and hence it modifies the bandgap essential for the development of next generation complex photonic integrated circuits (ICs). We report a large bandgap blue shift of 144 nm is achievable with a very high increase in photoluminescence (PL) intensity. The experimental results of the bandgap shifted waveguides and laser diodes are presented. Photoluminescence (PL) measurements of InGaAsP/InP laser structure were taken before and after Al2O3-QWI process. The proposed technique can provide reliable and fast post-growth wafer level fabrication of photonic devices monolithically.
Original languageEnglish
Article number109287
JournalOptics & Laser Technology
Volume162
Early online date26 Feb 2023
DOIs
Publication statusPublished - Jul 2023

Keywords

  • Sputtering
  • Bandgap shifted
  • Photonic Integration
  • Quantum Well Intermixing (QWI)
  • Photoluminescence (PL)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Sputtering Al2O3 enhanced bandgap engineering for integrated photonic devices'. Together they form a unique fingerprint.

Cite this