Iwao Teraoka

  • Professor

Chemical and Biomolecular Engineering

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Iwao Teraoka
Research Interests
Photonic sensor Whispering gallery mode

University of Tokyo
Applied Physics B.E., 1982

University of Tokyo
Applied Physics D.E., 1989

1986 – 1989: Research Associate at Department of Applied Physics, University of Tokyo
1989 – 1990: Visiting scientist, IBM Almaden Research Center
1990 – 1992:  Postdoctoral fellow, University of Massachusetts, Polymer Science & Engineering
1993 – Present: Assistant Professor, Department of Chemistry, Polytechnic University, Brooklyn, NY (1999 Associate Professor, 2008 Professor)

1986 – 1989: NSF Young Investigator Award
1997, 1998: Science and Technology Agency (Japan) Fellow

Recent publications

  1. Mode latching and self tuning of whispering gallery modes in a stand-alone silica microsphere, M. Agarwal and I. Teraoka, Appl. Phys. Lett. 101, 251105 (2012).
  2. All-photonic, dynamic control of optical path length in a silica sphere resonator, M. Agarwal and I. Teraoka, Opt. Lett. 38, 2640–2643 (2013).
  3. Analysis of thermal stabilization of whispering gallery mode resonance, I. Teraoka, Opt. Comm. 310, 212–216 (2014).
  4. A hybrid filter of Bragg grating and ring resonator, I. Teraoka, Opt. Comm. 339, 108–114 (2015).
  5. Whispering gallery mode dip sensor for aqueous sensing, M. Agarwal, and I. Teraoka, Anal. Chem. 87, 10600−10604 (2015).

Other significant publications

  1. Polymer Solutions: An Introduction to Physical Properties, I. Teraoka, John Wiley (2002). http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471389293.html
  2. Theory on resonance shifts in TE and TM whispering gallery modes by non-radial perturbations for sensing applications, I. Teraoka and S. Arnold, J. Opt. Soc. Amer. B. 23, 1381–1389 (2006).
  3. Enhancing sensitivity of a whispering gallery mode microsphere sensor by a high-refractive index surface layer, I. Teraoka and S. Arnold, J. Opt. Soc. Amer. B. 23, 1434–1441 (2006).

WGM sensor is a photonic sensor embodied by a transparent spherical glass touching a pair of tapered optical fibers. The sensor detects whatever occurs near the surface of the glass sphere. For example, immobilizing a ligand onto the surface readily turns the sphere into a sensor that detects binding of target molecules. Attaching a layer that selectively partitions lead ions turns the sphere into a lead ion sensor.