General Introduction

My group works on research and development of infrared semiconductors for creating next generation technologies. Infrared is a type of light which is not visible to the eye, but is emitted by you, me, and any warm body. Semiconductors are crystals, just like diamond, can be grown, and are the basis of all electronics and many laser technologies.  We grow and structure them in layers like in a cake or an onion, except much thinner, incredibly thin - 1 millionth the thickness of a human hair. We try to make these infrared semiconductors more efficient, with new capabilities, from new materials and structures. This leads to new and improved technologies in medicine, the environment, and military. For example, infrared light can be used for sensing things like glucose or sugar, important to diabetics and in industrial processes; nitrate, important to farmers for applying appropriate amounts of fertilizer; and gases such as carbon dioxide, important to monitoring air quality. Infrared LED arrays can create thermal scene projectors, which is a technology critically important to national security. The communication strengths, bandwidth, and connectivity of photonic integrated circuits has gained attention for their use in photonic neural networks. By building infrared semiconductors with new capabilities, we open the door to all kinds of new technologies, some of which have yet to be dreamed up. 

Mid-Infrared Optoelectronics


Nanowires and Superlattices


Plasmonics and Metamaterials


Thermal Scene Generation


Optical Chemical Sensing


Molecular Beam Epitaxy




Ultrafast Spectroscopy


Micro and Nanofabriction