Polymer optical micro-ring resonators

Micro-ring resonators are compact, versatile optical devices with applications in telecommunications and sensing.  Our research is carried out with a view toward applications in fast signal processing on a chip, for example, filtering, efficient switching, and buffering of optical signals. We are investigating polymers as our material platform because polymers can have high optical nonlinearities, low absorption loss, allow easy device fabrication, and offer a great variety of material properties.  We have designed and fabricated filters using arrays consisting of over 100 micro-rings with very low throughput loss (<3 dB) yet broad bandwidth. High quality micro-rings have also been fabricated using MAP.



Spectral transmission exhibiting a wide stop band at the
throughport of a lattice of 72 polymer microring



All-optical switching in a microring-loaded
Mach-Zehnder Interferometer fabricated by standard
photolithography from PFCB.


Demonstration of all-optical switching in an array of polymer microrings.



“High-Finesse Laterally-Coupled Single-Mode Benzocyclobutene Micro-Ring Resonators,”W.-Y. Chen, R. Grover, T. A. Ibrahim, V. Van, W. N. Herman, and P.-T. Ho, Photonics Technology Letters 16, 470(2004).

 “Microring Resonators Using Multiphoton Absorption Polymerization,” L. Li, W.-Y. Chen, T. N. Ding, W. N. Herman, P.-T. Ho, and J. T. Fourkas, CLEO’07, May 2007, Baltimore.

“Periodic microring lattice as a bandstop filter” W.-Y. Chen, V. Van, W. N. Herman, P.-T. Ho, IEEE Photonics Technology Letters 18, pp. 2041-3(2006)

“Linearized Microring-Loaded Mach–Zehnder Modulator With RF Gain,” Vien Van, Warren N. Herman, and Ping-Tong Ho, Journal of Lightwave Technology 24, 1850(2006). 

“Group Delay Enhancement in Circular Arrays of Microring Resonators,” V. Van, T.-N. Ding, W. N. Herman and P.-T. Ho, IEEE Photonics Technology Letters 20, 997(2008).

"High-Performance Microring Resonators Fabricated with Multiphoton Absorption Polymerization," Linjie Li, Erez Gershgoren, George Kumi, Wei-Yen Chen, P.-T. Ho, Warren N. Herman, and John T. Fourkas, Advanced Materials 20, 1(2008).

“Aperture-coupled MIM plasmonic ring resonators with sub-diffraction modal volumes,” Z. Han, V. Van, W. N. Herman and P.-T. Ho, Optics Express 17, 12678(2009).

“Compact Silicon microring-assisted directional couplers for optical signal processing,” A. M. Prabhu, V. Van, W. N. Herman and P.-T. Ho., Optics Letters 34, 1249(2009).