Dr. Chang Chang
Assistant Professor
School of Biomedical Engineering, Science & Health Systems
Focus Area: X-ray Microscopy and Surgery

Dr. Chang earned his B.S. in Electrical Engineering from National Taiwan University in Taiwan in 1996, and then went on to earn an M. Eng. degree from Cornell University in 1997, and his Ph.D. from the University of California at Berkeley in 2002.

Dr. Chang has characterized the spatial coherence properties of undulator radiation, making the first direct measurement of refractive indices at Extreme Ultraviolet (EUV) wavelengths, and has thereby introduced a new kind of optical element into the field of x-ray optics. His dissertation work, "Coherence Techniques at Extreme Ultraviolet Wavelengths" resulted in publications in the journals Optics Communications, Optics Letters, and two cover features in Applied Optics.

Using nanotechnology, Dr. Chang demonstrated for the first time a novel diffractive Fourier optical element that enables a short wavelength optical holographic interferometry system by providing efficient and effective wavefront manipulation that was not available before at these wavelengths. With its improved efficiency, this demonstrated wavefront manipulation ability of Fourier optical elements has opened a new era in short wavelength optics and was featured on the cover of the December 2002 issue of Applied Optics.

Dr. Chang's research also includes modeling and experimental characterization of spatial coherence for a optical imaging systems. His work in this area resulted in a rigorous spatial coherence propagation analysis based on the Fresnel-Huygens principle that was subsequently demonstrated and featured on the May 2003 cover of Applied Optics. Another area of his research inerests involves coherence techniques and nanotechnology for biomedical imaging.Through the use of optical coherence techniques and nanotechnology, Dr. Chang is interested in realizing high resolution, in vivo, non-invasive, and 3-D imaging and in applying nanotechnology to achieve outcomes such as guided cell growth and high-throughout platforms.