People

Affiliated Faculty

Research Interests

Research in Optical Characterization and Nanophotonics (OCN) laboratory focuses on developing and applying advanced optical characterization techniques to the study of solid-state and biological phenomena at the nanoscale. Nanophotonics addresses a broad spectrum of optics on the nanometer scale covering technology and basic science. Compared to the behavior of isolated molecules or bulk materials; the behavior of nanostructures exhibit important physical properties not necessarily predictable from observations of either individual constituents or large ensembles.

Current Research

Current projects include development of high-resolution subsurface imaging techniques based on numerical aperture increasing lens (NAIL) for the study of semiconductor devices and circuits and spectroscopy of quantum dots; optical characterization of carbon nanotubes; biosensors based on microring resonators; and development of new nanoscale microscopy techniques utilizing interference of excitation as well as emission from fluorescent molecules. In addition to microscopy, optical resonance is nearly ubiquitous in our research projects including development of resonant cavity enhanced photodetectors and imaging biosensors for DNA and protein arrays.

Selected Recent Publications

J. R. Dupuis, J. Needham, I. E. Ozkumur, D. A. Bergstein, B. B. Goldberg, J. R. Engel, D. L. Carlson, and M. S. Ünlü, "Hyperspectral Fourier transform spectrometer for reflection spectroscopy and spectral self-interference fluorescence microscopy," Applied Optics, Vol. 47, 20 March 2008, pp. 1223-1234

M. Ghioni, G. Armellini, P. Maccagnani, I. Rech, M. K. Emsley, and M. S. Ünlü, "Resonant-Cavity-Enhanced Single-Photon Avalanche Diodes on Reflecting Silicon Substrates," IEEE Photonics Technology Letters , Vol. 20, No. 6, 15 March 2008, pp. 413-415

D. A. Bergstein, I. E. Ozkumur, A. C. Wu, A. Yalcin, J. Needham, R. Irani, J. Gershoni, B. B. Goldberg, C. DeLisi, M. F. Ruane, and M. S. Ünlü, "Resonant Cavity Imaging: A Means Toward High-Throughput Label-Free Protein Detection," IEEE Journal of Selected Topics in Quantum Electronics, Vol. 14, No. 1, January/February 2008

M. Dogan, A. Yalcin, S. Jain, M. B. Goldberg, A. K. Swan, M. S. Ünlü, and B. B. Goldberg, "Spectral Self-Interference Fluorescence Microscopy for Subcellular Imaging," IEEE Journal of Selected Topics in Quantum Electronics, Vol. 14, No. 1, January/February 2008

A. N. Vamivakas, M. Atature, J. Dreiser, S. T. Yilmaz, A. Badolato, A. K. Swan, B. B. Goldberg, A. Imamoglu, and M. S. Ünlü, "Strong Extinction of a Far-Field Laser Beam by a Single Quantum Dot ," Nano Letters, Vol. 7, No. 9, September 2007, pp. 2892-2896

D. M. Karabacak, K. Ekinci, C. H. Gan, G. J. Gbur, M. S. Ünlü, S. B. Ippolito, B. B. Goldberg, and P. S. Carney, "Diffraction of evanescent waves and nanomechanical displacement detection," Optics Letters, Vol. 32, No. 13, 1 July 2007, pp. 1881-1883

A. G. Walsh, A. N. Vamivakas, Y. Yin, S. B. Cronin, M. S. Ünlü, B. B. Goldberg, and A. K. Swan, "Scaling of exciton binding energy with external dielectric function in carbon nanotubes," Physica E, July 2007

A. G. Walsh, A. N. Vamivakas, Y. Yin, S. B. Cronin, M. S. Ünlü, B. B. Goldberg, and A. K. Swan, "Screening of Excitons in Single, Suspended Carbon Nanotubes," Nano Letters, Vol. 7, No. 6, 9 May 2007, pp. 1485-1488

A. N. Vamivakas, S. B. Ippolito, A. K. Swan, M. S. Ünlü, M. Dogan, E. R. Behringer, and B. B. Goldberg, "Phase-sensitive detection of dipole radiation in a fiber-based high numerical aperture optical system ," Optics Letters, Vol. 32, No. 8, 15 April 2007, pp. 970-972

Y. Yin, A. N. Vamivakas, A. G. Walsh, S. B. Cronin, M. S. Ünlü, B. B. Goldberg, and A. K. Swan, "Optical Determination of Electron-Phonon Coupling in Carbon Nanotubes," Physical Review Letters, Vol. 98, No. 3, 19 January 2007, pp. 037404

B. J. Davis, M. Dogan, B. B. Goldberg, W. C. Karl, M. S. Ünlü, and A. K. Swan, "4Pi spectral self-interference microscopy," Journal of the Optical Society of America, Vol. 24, 2007, pp. 3762-3771

B. J. Davis, A. K. Swan, M. S. Ünlü, W. C. Karl, B. B. Goldberg, J. C. Schotland, and P. S. Carney, "Spectral self-interference microscopy for low-signal nanoscale axial imaging," Journal of the Optical Society of America, Vol. 24, 2007, pp. 3587-3599