Reconfigurable Frequency-Selective Resonance Splitting in Chalcogenide Microring Resonators

ACS Photonics, vol. 7, pp. 499–511

Abstract

Abstract This paper reports a method to enable, for the first time, reconfigurable control of resonance splitting of one or multiple arbitrarily selected azimuthal orders in a microring resonator. This is accomplished by inscribing Bragg gratings in photosensitive Ge23Sb7S70 chalcogenide microring resonators via a novel cavity-enhanced photoinscription process, in which injection of light at the targeted C-band resonance frequency induces a spatially varying refractive index change. The so-formed Bragg grating precisely matches the selected resonance order without introducing optical losses. Long-term room temperature stability of the photoinscribed Bragg gratings has been verified in darkness and during operation with reduced optical power levels. The Bragg gratings can be reconfigured by first erasure with flood illumination of visible light at 561 nm and subsequent reinscription. We also report controlled splitting of multiple resonances by inscribing superimposed Bragg gratings.

Authors 9

1. Bin Shen Aachen Institute of Integrated Photonics (IPH)

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University , , Campus Blvd 73 , ,

   Institute of Integrated Photonics, RWTH Aachen University, Campus Blvd 73, 52074 Aachen, Germany

2. Hongtao Lin

   Zhejiang University

   Affiliation as printed

   Zhejiang University , , ,

   College of Information Science & Electronic Engineering, Zhejiang University, Hangzhou, China

3. Saeed Sharif Azadeh Aachen Institute of Integrated Photonics (IPH)

   Max Planck Institute of Microstructure Physics · RWTH Aachen University

   Affiliation as printed

   Max Planck Institute of Microstructure Physics , , Weinberg 2 , ,

   RWTH Aachen University , , Campus Blvd 73 , ,

   Institute of Integrated Photonics, RWTH Aachen University, Campus Blvd 73, 52074 Aachen, Germany

   Now at NINT Department, Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

4. Jovana Nojić Aachen Institute of Integrated Photonics (IPH)

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University , , Campus Blvd 73 , ,

   Institute of Integrated Photonics, RWTH Aachen University, Campus Blvd 73, 52074 Aachen, Germany

5. Myungkoo Kang

   University of Central Florida

   Affiliation as printed

   University of Central Florida , , 4304 Scorpius Street , , ,

   College of Optics and Photonics, University of Central Florida, 4304 Scorpius Street, Orlando, Florida 32816-2700, United States

6. Florian Merget Aachen Institute of Integrated Photonics (IPH)

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University , , Campus Blvd 73 , ,

   Institute of Integrated Photonics, RWTH Aachen University, Campus Blvd 73, 52074 Aachen, Germany

7. Kathleen A. Richardson

   University of Central Florida

   Affiliation as printed

   University of Central Florida , , 4304 Scorpius Street , , ,

   College of Optics and Photonics, University of Central Florida, 4304 Scorpius Street, Orlando, Florida 32816-2700, United States

8. Juejun Hu

   Massachusetts Institute of Technology

   Affiliation as printed

   Massachusetts Institute of Technology , , , ,

   Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States

9. Jeremy Witzens corresponding Aachen Institute of Integrated Photonics (IPH)

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University , , Campus Blvd 73 , ,

   Institute of Integrated Photonics, RWTH Aachen University, Campus Blvd 73, 52074 Aachen, Germany