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.



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!

11/23/2016  Tess and Yong’s article “Topological Insulator Film Growth by Molecular Beam Epitaxy: A Review” was published in Crystals.  Congratulations Tess and Yong!

11/14/2016  Tess passes her quals!  Congratulations, Tess!

11/01/2016  Silvia Hertel, an exchange student from Germany, joins the group for three months through the Fraunhofer program.  Welcome, Silvia!

10/01/2016  Patrick Sohr, a new MSEG graduate student, joins the group.  Welcome, Patrick!

09/23/2016  Krysta La Bruna, an undergraduate researcher from Chemical Engineering, joins the group.  Welcome, Krysta!

09/21/2016  Dongxia wins a best student poster award at North American Molecular Beam Epitaxy conference!  Congratulations, Dongxia!

09/21/2016  Prof. Law wins the North American Molecular Beam Epitaxy Young Investigator award.

09/07/2016  Dongxia passes her quals!  Congratulations, Dongxia!

08/08/2016  The Law group receives funding from the NSF to pursue research on infrared metamaterials.

05/05/2016  Chiyu wins an research fellowship for summer 2016 from the UD Undergraduate Research Program. Congratulations, Chiyu!

05/02/2016  Christian rejoins the group for summer 2016.  Welcome back Christian!

04/13/2016  Dongxia and Christian’s paper “Single-material semiconductor hyperbolic metamaterials” was published in Optics Express.  Congratulations Dongxia and Christian!

03/11/2016 Tess’ JVSTB paper was on the most-read list for February.  Congratulations, Tess!

02/19/2016 Chiyu Zhang, an undergraduate researcher from Chemistry, joins the group.  Welcome Chiyu!

02/05/2016 Tess’ paper “Growth of Bi2Se3 topological insulator films using a selenium cracker source” was published in JVSTB.  Congratulations, Tess!

01/23/2016  Christian won first place at APS CUWiP for her presentation on her summer research!  Congratulations, Christian!

11/02/2015  Yong Wang, a new MSEG graduate student, joins the group.  Welcome Yong!

10/07/2015  Prof. Law presents research on topological insulator growth at the North American Molecular Beam Epitaxy conference.

06/22/2015  Lisa Gathura joins the group as part of the UD High School Internship Program.  Welcome, Lisa!

05/21/2015  Prof. Law receives a University of Delaware Research Foundation grant to pursue topological insulator research.

05/11/2015  Christian Harris, an undergrad from Lincoln University, joins the group.  Welcome Christian!

04/16/2015  The Veeco GenXplor topological insulator MBE is installed and baking!

03/09/2015  The new Veeco GenXplor topological insulator MBE arrives!

01/01/2015  MSEG graduate students Theresa Ginley and Dongxia Wei join the group.  Welcome Tess and Dongxia!

08/01/2014  Prof. Law joins the MSEG department at UD.