“Thermally managed Z-scan methods investigation of the size-dependent nonlinearity of graphene oxide in various solvents”

Paul Burkins, Robinson Kuis, Isaac Basaldua, Anthony M. Johnson, Siva Ram Swaminathan, Dajie Zhang and Sudhir Trivedi

J. Opt. Soc. Am. B 33 (11), 2395 (2016)

URL: https://www.osapublishing.org/josab/abstract.cfm?uri=josab-33-11-2395

PDF: http://physics.umbc.edu/files/2016/11/josab-33-11-2395-2016.pdf ]]>

“Thermally managed Z-scan methods investigation of the size-dependent nonlinearity of graphene oxide in various solvents” Paul Burkins, Robinson Kuis, Isaac Basaldua, Anthony M. Johnson, Siva...

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• Peter Breiding, "Testing the IC/CMB model of extended X-ray emission for large scale quasar jets with the Fermi/LAT"
  Mentor: Dr. Meyer

• Richard Brewster, "Amplification of entanglement"
  Mentor: Dr. Franson

• Haixu Leng, "Discrete metal-semiconductor nanoparticle assemblies for controlled plasmon-exciton coupling"
  Mentor: Dr. Pelton

• Lipi Mukherjee, "Radiative properties of oceanic particles"
  Mentor: Dr. Zhai

Peter, Ricky, Haixu, and Lipi were honored at the Graduate School's Annual PhD Candidates Ceremony on November 10, 2016.
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Congratulations to our grad students who have advanced into PhD Candidacy over the past year: • Peter Breiding, "Testing the IC/CMB model of extended X-ray emission for large scale quasar jets...

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Please click here for more information. ]]>

The National Oceanic and Atmospheric Administration (NOAA) recently awarded UMBC with a 5-year funding grant to educate and train underrepresented minority (URM) students in NOAA-related mission...

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Sebastian Deffner, assistant professor of physics, has been selected as the winner of the 2016 Leon Heller Postdoctoral Publication Prize in Theoretical Physics. This prize is awarded biennially...

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Sebastian Deffner, assistant professor of physics, has been elected as the 2016 winner of the Early Career Award of New Journal of Physics. He has been recognized as being an extremely talented...

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UMBC News: http://news.umbc.edu/nsf-funds-jason-kestner-to-tackle-major-obstacle-to-quantum-computing/ ]]>

Jason Kestner, assistant professor of physics, has received an award from the National Science Foundation (NSF) to perform a theoretical study of stimulated echos in quantum entanglement. His...

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The Carl S. Weber Excellence in Teaching Award honors a CNMS faculty member at UMBC with exceptional dedication to teaching as demonstrated by his or her enthusiasm, up-to-date teaching materials, effective mentoring, community service in the teaching area, approachability, rigorous learning requirements, coherent teaching philosophy and inspirational teaching style.

Dr. Pittman was recognized at the annual CNMS Student Recognition Day in May 2016.


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Dr. Pittman has been selected as the recipient of the 2016 Carl S. Weber Excellence in Teaching Award. The Carl S. Weber Excellence in Teaching Award honors a CNMS faculty member at UMBC with...

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While pursuing his undergraduate degree at UMCP, Paul served as a construction worker and literally helped to build our campus while mixing cement, carrying bricks and erecting scaffolds for the Administration and Social Sciences Buildings. Paul also has fond memories of joining friends attending UMBC at dances held in the Academic Services Building during the late 1960’s.

Paul came to UMBC as a Lab Technician in the Physics Department. He has remained with the same department the entire 43 years, currently serving as the Technical Coordinator & Facilities Manager. While he remembers and is grateful for the many relationships with professors he has had over the years, he specifically recalled Dr. Alvin Meckler who hired Paul and became a mentor to him in the early years, when the Physics Department was very small.

As you can imagine, technology has changed quite a bit since the 1970’s when computers took up entire rooms and punch cards were used to program. One memory Paul shared is when he helped build a Motorola 6800 computer from a kit. The computer was used to take data in a research lab before commercially available machines running DOS, Windows or Mac OS were available. But his most ambitious project was acting as the Physics Department’s point of contact during the design and construction of the Physics Building.

Paul credits his longevity at UMBC to the many Physicists he has worked with over the years…his education continued by working with them in labs, auditing and taking courses, and being able to apply learned skills to his work environment.

To his knowledge, no UMBC exempt employee has been here for 45 years or more…he has thrown down the gauntlet to all of you that are close…he is planning to stay around for a while longer and claim another record!

“Something I appreciate about working at UMBC is there is always something new to learn.” —Paul Ciotta, UMBC’s Senior Exempt Employee February 5, 1973 – Present
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Tucked in an office on the fourth floor of the Physics Building, you will find Paul Ciotta who can claim the title of UMBC’s Senior Exempt Employee. Though Paul officially joined the UMBC...

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T. Seifert, S. Jaiswal, U. Martens, J. Hannegan, L. Braun, P. Maldonado, F. Freimuth, A. Kronenberg, J. Henrizi, I. Radu, E. Beaurepaire, Y. Mokrousov, P. M. Oppeneer, M. Jourdan, G. Jakob, D. Turchinovich, L. M. Hayden, M. Wolf, M. Münzenberg, M. Kläui & T. Kampfrath

Nature Photonics (2016) doi:10.1038/nphoton.2016.91

Abstract: Terahertz electromagnetic radiation is extremely useful for numerous applications, including imaging and spectroscopy. It is thus highly desirable to have an efficient table-top emitter covering the 1–30 THz window that is driven by a low-cost, low-power femtosecond laser oscillator. So far, all solid-state emitters solely exploit physics related to the electron charge and deliver emission spectra with substantial gaps. Here, we take advantage of the electron spin to realize a conceptually new terahertz source that relies on three tailored fundamental spintronic and photonic phenomena in magnetic metal multilayers: ultrafast photoinduced spin currents, the inverse spin-Hall effect and a broadband Fabry–Pérot resonance. Guided by an analytical model, this spintronic route offers unique possibilities for systematic optimization. We find that a 5.8-nm-thick W/CoFeB/Pt trilayer generates ultrashort pulses fully covering the 1–30 THz range. Our novel source outperforms laser-oscillator-driven emitters such as ZnTe(110) crystals in terms of bandwidth, terahertz field amplitude, flexibility, scalability and cost.

The URL for the article is http://www.nature.com/nphoton/journal/vaop/ncurrent/full/nphoton.2016.91.html ]]>

"Efficient metallic spintronic emitters of ultrabroadband terahertz radiation" T. Seifert, S. Jaiswal, U. Martens, J. Hannegan, L. Braun, P. Maldonado, F. Freimuth, A. Kronenberg, J. Henrizi,...

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Haixu Leng, James Loy, Victor Amin, Emily A. Weiss, and Matthew Pelton

ACS Energy Letters, Vol. 1, Issue 1, Page 9 (2016)

URL: http://pubs.acs.org/doi/abs/10.1021/acsenergylett.6b00047

Abstract: This Letter reports the measurement of photoinduced electron-transfer rates from individual CdSe/CdS nanocrystals, or quantum dots (QDs), to methyl viologen acceptor molecules adsorbed on the QD surfaces, using time-resolved photoluminescence at the single-nanocrystal level. For each QD measured, the electron-transfer rate is constant over time, and the photoluminescence blinking dynamics are independent of the measured transfer rate. The total electron-transfer rate is distributed in discrete, constant increments, corresponding to discrete numbers of adsorbed molecules on each QD. The results thus validate previous assumptions that viologen molecules adsorb independently on QD surfaces and that the total electron-transfer rate from a single QD to multiple molecules on its surface is simply the sum of the transfer rates to the individual molecules. The measurement provides an optical method to count the number of active acceptor molecules bound to a single nanocrystal and opens up new possibilities for mechanistic studies of charge transfer at the nanoscale.
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“Electron transfer from single semiconductor nanocrystals to individual acceptor molecules” Haixu Leng, James Loy, Victor Amin, Emily A. Weiss, and Matthew Pelton ACS Energy Letters, Vol. 1,...

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