New article by Dr. Sanjit Karmakar & Ronald Meyers
Color controllable polarization entanglement generation in optical fiber at telecommunication wavelengths
Sanjit Karmakar and Ronald E. Meyers
Optics Express Vol. 23, Issue 16, pp. 20605-20616 (2015)
doi: 10.1364/OE.23.020605
This article proposes a polarized entangled photon source in optical fiber with low Raman noise that features the controllable generation of specific signal and idler wavelengths (colors) by varying the pump power. The novel two color source can provide needed telecom entangled photon wavelengths for applications in quantum communications, quantum computing, and quantum imaging.
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Color controllable polarization entanglement generation in optical fiber at telecommunication wavelengths Sanjit Karmakar and Ronald E. Meyers Optics Express Vol. 23, Issue 16, pp....
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Fri, 31 Jul 2015 09:56:47 -0400
Fri, 31 Jul 2015 11:51:52 -0400
New review article in Nature Photonics by Dr. Matthew Pelton
“Modified spontaneous emission in nanophotonic structures”
Nature Photonics 9, 427 - 435 (2015).
The URL for the article is http://www.nature.com/nphoton/journal/v9/n7/full/nphoton.2015.103.html
Nearly all of the light that reaches our eyes, whether it comes from the Sun, a light bulb, or the glowing display of a computer or smartphone, is generated by a physical process known as spontaneous emission. The rate at which spontaneous emission occurs — that is, the amount of light given off by a material — was long thought to be an unchangeable property of the material involved. However, we now understand it as arising from a quantum-mechanical interaction between the material and its environment. It is thus possible to modify spontaneous emission by changing the environment of a light-emitting material. This article reviews a range of research in modified spontaneous emission, pointing out common physical principles and clearing up potential misconceptions and pitfalls in interpreting experimental data. It also reviews a few applications that this research may enable, including chemical and biochemical sensors, optical communication and information processing, and conversion of sunlight into electricity.
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“Modified spontaneous emission in nanophotonic structures” Nature Photonics 9, 427 - 435 (2015). The URL for the article is...
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Wed, 01 Jul 2015 12:09:23 -0400
Wed, 01 Jul 2015 12:10:02 -0400
Observations of Black Hole Jet Collision published in Nature
UMBC Astrophysicists Eileen Meyer and Markos Georganopoulos have recently published an article in the journal Nature (along with colleagues from STScI, FIT and JHU), discussing recent observations of a jet from a super-massive black hole in the galaxy NGC 3862. Using 20 years of imaging with the Hubble Space Telescope, the scientists were able to track the motion of high-energy plasma in the jet, clearly visible by eye in a movie created from the four epochs of observation. They found that one bright ‘knot’ of plasma in the jet is in the process of colliding with a slower-moving knot just downstream. Colliding knots have long been theorized as a way to accelerate the particles which produce high-energy radiation in many astrophysical jets, but this is the first time such a collision has been observed. The paper appeared in the May 28th online edition of Nature.
The UMBC Research News Item is available here. Nature Publication here.
The press release was also picked up by the LA times and Time magazine, and many more online publications.
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UMBC Astrophysicists Eileen Meyer and Markos Georganopoulos have recently published an article in the journal Nature (along with colleagues from STScI, FIT and JHU), discussing recent...
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Fri, 12 Jun 2015 09:49:42 -0400
Mon, 23 Aug 2021 13:23:14 -0400
Welcome to new faculty member: Dr. Eileen Meyer
Dr. Eileen Meyer joins the UMBC Physics faculty in the fall of 2015. As a multi-wavelength observational astronomer, her research focuses on the physics jets from the black holes at the centers of active galaxies, and the impact of jets on their host galaxies and environments.
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Dr. Eileen Meyer joins the UMBC Physics faculty in the fall of 2015. As a multi-wavelength observational astronomer, her research focuses on the physics jets from the black holes at the centers...
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Fri, 15 May 2015 13:01:26 -0400
Prof. Turner featured in Baltimore Sun article
Study finds gas flowing from black hole could stunt galaxy growth
By Scott Dance
The Baltimore Sun
http://www.baltimoresun.com/health/bs-hs-black-hole-growth-20150327-story.html
]]>
Study finds gas flowing from black hole could stunt galaxy growth
By Scott Dance The Baltimore Sun http://www.baltimoresun.com/health/bs-hs-black-hole-growth-20150327-story.html
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Tue, 31 Mar 2015 15:18:10 -0400
Congratulations to our 2015-16 URA and URAS Awardees
James Loy
"Charge Transfer from Single Semiconductor Nanocrystals to Single Molecules"
Advisor: Dr. Pelton
2015-2016 URA Scholar
John Hannegan
"Creating a Fiber-Laser Based THz System Using Electro-Optic Polymers"
Advisor: Dr. Hayden
2015-2016 URA Scholar
Michael Wolfe
"Entanglement Dymanics of Singlet-Triplet Qubits in the Presence of Inductive Coupling"
Advisor: Dr. Kestner
2015-2016 URA Scholar
Jonathan Luckin
"Understanding the Mysterious Energy Content of the Lobes of Radio Galaxies Through Numerical Simulations"
Advisor: Dr. Georganopoulos
2015-2016 URA Scholar
Ashan Mahmood
"Computational Analysis of Optical Properties of Quantum Dots Coupled With Nano-sized Silver Particles"
Advisor: Dr. Pelton
2015-2016 URA Scholar
Kevin Whitley
Advisor: Dr. Pelton
2015-2016 URAS Award
]]>
James Loy "Charge Transfer from Single Semiconductor Nanocrystals to Single Molecules" Advisor: Dr. Pelton 2015-2016 URA Scholar John Hannegan "Creating a Fiber-Laser Based THz System Using...
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Fri, 27 Mar 2015 15:55:50 -0400
Fri, 27 Mar 2015 15:59:22 -0400
New article by recent graduate Dr. Hong Cai & Dr. Johnson
Investigation of giant Kerr nonlinearity in quantum cascade lasers using mid-infrared
femtosecond pulses
Hong Cai, Sheng Liu, Elaine Lalanne, and Anthony M. Johnson
Citation: Applied Physics Letters 106, 051102 (2015); doi: 10.1063/1.4907538
View online: http://dx.doi.org/10.1063/1.4907538
Published by the AIP Publishing
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Investigation of giant Kerr nonlinearity in quantum cascade lasers using mid-infrared femtosecond pulses Hong Cai, Sheng Liu, Elaine Lalanne, and Anthony M. Johnson Citation: Applied Physics...
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Tue, 03 Mar 2015 10:34:03 -0500
Thu, 25 Feb 2021 15:11:38 -0500
Dr. Michael Hayden elected as Fellow of the Optical Society
Dr. L. Michael Hayden, UMBC Professor of Physics and Department Chair, was honored as a 2015 Fellow Member of The Optical Society (OSA), the leading professional society for researchers, industry leaders, and students focused on the science of light and founded in 1916. Dr. Hayden was one of 76 individuals recognized by OSA for their significant contributions to the advancement of optics and photonics. Dr. Hayden's professional interests involve the study of new materials, including nonlinear optical and electro-optic polymers, and their use in terahertz applications.
OSA Fellows are selected based on their overall impact on optics, as gauged through factors such as specific scientific, engineering, and technological contributions, a record of significant publications or patents related to optics, technical leadership in the field, and service to OSA and the global optics community. Drawing from nominations from current fellows, the OSA Fellow Members Committee recommends candidates to the OSA Board of Directors. This process is highly competitive, as no more than 10 percent of the OSA Membership may be Fellows.
“This year’s class of OSA Fellows has offered prodigious service to OSA and the global optics community,” said OSA President Philip Bucksbaum. “The Optical Society is honored to offer recognition for their outstanding contributions and leadership in the optics and photonics profession.”
Link: Recent Fellows - Awards & Grants – The Optical Society (OSA) | The Optical Society
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Dr. L. Michael Hayden, UMBC Professor of Physics and Department Chair, was honored as a 2015 Fellow Member of The Optical Society (OSA), the leading professional society for researchers, industry...
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Tue, 03 Mar 2015 10:19:03 -0500
Wed, 02 Dec 2015 15:37:43 -0500
New article by Dr. Sanjit Karmakar and Prof. Yanhua Shih
"Noninvasive high resolving power entangled photon quantum microscope"
Sanjit Karmakar, Ronald E. Meyers, and Yanhua Shih
Journal of Biomedical Optics 20(1), 016008 (January 2015)
Abstract:
A noninvasive high resolving power quantum microscope would facilitate progress in the areas of research and development in biosciences as well as in the area of biomedical technology. Longer-wavelength microscopes, i.e., visible or near-infrared, can provide noninvasive features. On the other hand, shorter wavelengths, i.e., in the ultraviolet, can provide better resolving power. We propose the development of both a noninvasive and high resolving power quantum microscope by using two-color entangled photon ghost imaging technology.
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"Noninvasive high resolving power entangled photon quantum microscope" Sanjit Karmakar, Ronald E. Meyers, and Yanhua Shih Journal of Biomedical Optics 20(1), 016008 (January 2015) Abstract:...
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Wed, 21 Jan 2015 12:03:24 -0500
New article by PHYS grad student, Fernando Calderon Vargas
"Directly accessible entangling gates for capacitively coupled singlet-triplet qubits"
F. A. Calderon-Vargas and J. P. Kestner
Phys. Rev. B 91, 035301 – Published 6 January 2015
Abstract:
The recent experimental advances in capacitively coupled singlet-triplet qubits, particularly the demonstration of entanglement, opens the question of what type of entangling gates the system's Hamiltonian can produce directly via a single square pulse. We address this question by considering the system's Hamiltonian from first principles and using the representation of its nonlocal properties in terms of local invariants. In the analysis we include the three different ways in which the system can be biased and their effect on the generation of entangling gates. We find that, in one of the possible biasing modes, the Hamiltonian has an especially simple form, which can directly generate a wide range of different entangling gates including the iswap gate. Moreover, using the complete form of the Hamiltonian we find that, for any biasing mode, a cnot gate can be generated directly.
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"Directly accessible entangling gates for capacitively coupled singlet-triplet qubits" F. A. Calderon-Vargas and J. P. Kestner Phys. Rev. B 91, 035301 – Published 6 January 2015 Abstract:...
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Wed, 21 Jan 2015 11:15:37 -0500
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