Dr. Law’s research group in materials science and engineering focuses on the optical properties of novel materials and heterostructures in the mid- and far-infrared.  By engineering the material or structure, we can control the way light behaves in these materials, including squeezing light into subwavelength volumes, forcing light to bend backward (negative refraction) or even inducing light to bend around an object in such a way as to render it invisible.  The research in this group is focused both on observing and understanding the fundamental optical properties of these structures as well as creating useful devices, such as enhanced infrared detectors, useful for monitoring biological or chemical processes, or superlenses, which allow the viewing structures at length scales below the diffraction limit of light.

The materials and heterostructures my group is interested in are grown using molecular beam epitaxy (MBE), a technique whereby a material is deposited one atomic layer at a time.  This growth method results in highly ordered crystals with atomically sharp boundaries between materials, as well as complete control over the thickness and doping density in the material.  This results in low optical losses as well as the ability to engineer the material or structure for whatever purpose it is needed.  Optical measurements are made using Fourier transform infrared spectroscopy (FTIR), and films will be fabricated into devices using resources available in the new cleanroom in the ISE lab.

Current projects aim to modify and control the way light behaves in complex materials and structures, such as semiconductors and topological insulators.  By structuring these materials on a subwavelength scale as well as tuning their optical properties during growth, new physics can be uncovered and new devices with applications in fields such as biosensing, imaging, and emission control can be created.

Highly-motivated graduate or undergraduate students in Materials Science, Physics, or Electrical Engineering who are interested in joining the group should contact Dr. Law at slaw@udel.edu.



05/21/2018 Tess wins a Graduate Fellowship supported by the NASA Delaware Space Grant College and Fellowship Program.  Congratulations, Tess!

04/18/2018  Tess’ article “Coupled Dirac plasmons in topological insulators” is published in Advanced Optical Materials.  Congratulations Tess!

01/30/2018  Yong and Tess’ article “Growth of high-quality Bi2Se3 topological insulators using (Bi1-xInx)2Se3 buffer layers” was published in JVSTB and chosen as an Editor’s Pick.  Congratulations Yong and Tess!

12/01/2017  Zhengtianye (Daniel) Wang, a new MSEG graduate student, joins the group.  Welcome, Daniel!

08/09/2017  Dr. Law wins a Department of Energy Early Career award to pursue research on Dirac plasmons in topological insulators.

06/30/2017  Dongxia and Christian’s article “Volume plasmon polaritons in semiconductor hyperbolic metamaterials” was published in Optical Materials Express.  Congratulations Dongxia, and Christian!

06/05/2017  Hansel Montalvo Castro, an REU student from the University of Puerto Rico, and Nick Radziul, a UD Chemical Engineering student, join the group for the summer.  Welcome, Hansel and Nick!

03/16/2017  Tess is selected to attend “Expanding Horizons: The Ewha-Luce International Seminar” this summer in Korea.  Congratulations, Tess!

02/22/2017  Yong, Tess, and Chiyu’s article “Transport properties of Bi2(Se1−xTex)3 thin films grown by molecular beam epitaxy” was published in JVSTB.  Congratulations Yong, Tess, and Chiyu!

01/06/2017  Yong passes his quals!  Congratulations, Yong!