University of Massachusetts Amherst

About: University of Massachusetts Amherst is a education organization based out in Amherst Center, Massachusetts, United States. It is known for research contribution in the topics: Population & Galaxy. The organization has 37274 authors who have published 83965 publications receiving 3834996 citations. The organization is also known as: UMass Amherst & Massachusetts State College.

Black Phosphorus Mid-Infrared Photodetectors with High Gain

Abstract: Recently, black phosphorus (BP) has joined the two-dimensional material family as a promising candidate for photonic applications due to its moderate bandgap, high carrier mobility, and compatibility with a diverse range of substrates. Photodetectors are probably the most explored BP photonic devices, however, their unique potential compared with other layered materials in the mid-infrared wavelength range has not been revealed. Here, we demonstrate BP mid-infrared detectors at 3.39 μm with high internal gain, resulting in an external responsivity of 82 A/W. Noise measurements show that such BP photodetectors are capable of sensing mid-infrared light in the picowatt range. Moreover, the high photoresponse remains effective at kilohertz modulation frequencies, because of the fast carrier dynamics arising from BP’s moderate bandgap. The high photoresponse at mid-infrared wavelengths and the large dynamic bandwidth, together with its unique polarization dependent response induced by low crystalline symmetry,...

Transfer of learning from a modern multidisciplinary perspective

Abstract: Foreword, Robert Dufresne, Jose Mestre and James M. Royer. Re-Framing the Evaluation of Education: Assessing Whether Learning Transfers Beyond the Classroom, Susan M. Barnett and Stephen J. Ceci. How Far Can Transfer Go? Making Transfer Happen Across Physical, Temporal, and Conceptual Space, Diane Halpern and Milt Hakel. Fuzzy-Trace Theory: Implications for Transfer in Teaching and Learning, Valerie F. Reyna, Christopher Wolfe and Charles J. Brainerd. Transfer of Learning in Informal Education: The Case of Television, Shalom Fisch, Heather Kirkorian, and Daniel Anderson. Efficiency and Innovation in Transfer, Daniel Schwartz, John Bransford, and David Sears. When Transfer Fails: Effect of Knowledge, Expectations, and Observations on Transfer in Physics, Thomas Thaden-Koch, Jose Mestre, Bob Dufresne, Bill Gerace, and Bill Leonard. What Coordination Has to Say About Transfer, Andrea diSessa and Joseph Wagner. Dynamic Transfer: A Perspective from Physics Education Research, Sanjay Rebello and Dean Zollman. Resources, Framing, and Transfer, David Hammer, Andrew Elby, Rachel Scherr, and Edward F. Redish. Transfer of Mathematical Problem Solving Procedures Acquired Through Physical Science Instruction: When You Don't See it, Why Not?, Zbigniew Dziembowski and Nora Newcombe. Transfer Between Variants of Mathematics Test Questions, Mary E. Morley, Rene R. Lawless, and Brent Brideman. Theory, Level, and Function: Three Dimensions for Understanding the Connections Between Transfer and Student Assessment, Daniel Kickey, Mary Ann Horne and James Pellegrino.