Dr. Hayden's group publishes a paper on nanoporous silicon that is one of the top 10 downloaded papers in January from Optics Materials Express:

Ultrafast carrier dynamics and optical properties of nanoporous silicon at terahertz frequencies

Optical Materials Express, Vol. 4 Issue 2, pp.300-307 (2014)
Knab, J R; Lu, Xinchao; Vallejo, Felipe A; Kumar, Gagan; Murphy, Thomas E; Hayden, L Michael

We have investigated the broadband terahertz (THz) optical properties of nanoporous silicon samples with different porosities and the ultrafast carrier dynamics of photogenerated charge carriers in these materials. Following photoexcitation, we observe a fast carrier recovery time consisting of two dominant recombination processes with decay constants below ~10 ps. All samples exhibit initially low THz absorption that increases at higher frequencies, and is likely due to contributions from phonon bands and oxidation of the porous surface. The refractive index depends on porosity but shows little frequency dependence. These properties indicate that nanoporous silicon is a useful material for fast, ultrabroadband THz applications (e.g. intensity modulation). ]]>

Dr. Hayden's group publishes a paper on nanoporous silicon that is one of the top 10 downloaded papers in January from Optics Materials Express: Ultrafast carrier dynamics and optical...

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With Andrew Vaché, laboratory specialist, Department of Physics.

https://umbc.edu/stories/how-to-see-the-stars/
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How To See The Stars With Andrew Vaché, laboratory specialist, Department of Physics. https://umbc.edu/stories/how-to-see-the-stars/

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Dr. Malachi Tatum (left) and Dr. Patricia Sawamura (right) pose next to "True Grit" after receiving their PhD's at the December 2013 graduation ceremony.

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PI: J. Vanderlei Martins
Head Engineer: J. Dominik Cieslak

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Qubscout-S1 was launched on November 21 at 2:10 a.m. from a launch site in Yasny, Russia on a Dnepr LV rocket. PI: J. Vanderlei Martins Head Engineer: J. Dominik Cieslak

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Qubits encoded in time advance the prospects for quantum computing with single photons.

Physics 6, 110 (2013)

http://physics.aps.org/articles/v6/110
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Viewpoint: It's a Good Time for Time-Bin Qubits Qubits encoded in time advance the prospects for quantum computing with single photons. Physics 6, 110 (2013)...

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Dan Jones, "Nonlinear phase shifts at single-photon power levels"
Mentor: Dr. Pittman

Erin Balsamo, "X-ray concentrators for astronomical observations"
Mentor: Dr. George

These students were recognized at the Graduate School's annual Doctoral Candidates Reception on November 6, 2013.


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Congratulations to our students who advanced into PhD Candidacy over the past year: Dan Jones, "Nonlinear phase shifts at single-photon power levels" Mentor: Dr. Pittman Erin Balsamo, "X-ray...

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