This document contains a list of 19 selected publications by Stephan T. Melnychuk. The publications span from 1986 to 2016 and are related to particle accelerators, ion sources, hydrogen beam characteristics, and surface interactions of hydrogen atoms. Melnychuk's research focused on developing particle accelerators and ion sources for applications such as contraband detection systems and lithography light sources.
Hamiltonian design in readout from room-temperature Raman atomic memory XequeMateShannon
We present an experimental demonstration of the Hamiltonian manipulation in light-atom interface in Raman-type warm rubidium-87 vapor atomic memory. By adjusting the detuning of the driving beam we varied the relative contributions of the Stokes and anti-Stokes scattering to the process of four-wave mixing which reads out a spatially multimode state of atomic memory. We measured the temporal evolution of the readout fields and the spatial intensity correlations between write-in and readout as a function of detuning with the use of an intensified camera. The correlation maps enabled us to resolve between the anti-Stokes and the Stokes scattering and to quantify their contributions. Our experimental results agree quantitatively with a simple, plane-wave theoretical model we provide. They allow for a simple interpretation of the coaction of the anti-Stokes and the Stokes scattering at the readout stage. The Stokes contribution yields additional, adjustable gain at the readout stage, albeit with inevitable extra noise. Here we provide a simple and useful framework to trace it and the results can be utilized in the existing atomic memories setups. Furthermore, the shown Hamiltonian manipulation offers a broad range of atom-light interfaces readily applicable in current and future quantum protocols with atomic ensembles.
This presentation reviews the following paper.
Giannini, Vincenzo, Antonio I. Fernández-Domínguez, Susannah C. Heck, and Stefan A. Maier. "Plasmonic nanoantennas: fundamentals and their use in controlling the radiative properties of nanoemitters." Chemical reviews 111, no. 6 (2011): 3888-3912.
Hamiltonian design in readout from room-temperature Raman atomic memory XequeMateShannon
We present an experimental demonstration of the Hamiltonian manipulation in light-atom interface in Raman-type warm rubidium-87 vapor atomic memory. By adjusting the detuning of the driving beam we varied the relative contributions of the Stokes and anti-Stokes scattering to the process of four-wave mixing which reads out a spatially multimode state of atomic memory. We measured the temporal evolution of the readout fields and the spatial intensity correlations between write-in and readout as a function of detuning with the use of an intensified camera. The correlation maps enabled us to resolve between the anti-Stokes and the Stokes scattering and to quantify their contributions. Our experimental results agree quantitatively with a simple, plane-wave theoretical model we provide. They allow for a simple interpretation of the coaction of the anti-Stokes and the Stokes scattering at the readout stage. The Stokes contribution yields additional, adjustable gain at the readout stage, albeit with inevitable extra noise. Here we provide a simple and useful framework to trace it and the results can be utilized in the existing atomic memories setups. Furthermore, the shown Hamiltonian manipulation offers a broad range of atom-light interfaces readily applicable in current and future quantum protocols with atomic ensembles.
This presentation reviews the following paper.
Giannini, Vincenzo, Antonio I. Fernández-Domínguez, Susannah C. Heck, and Stefan A. Maier. "Plasmonic nanoantennas: fundamentals and their use in controlling the radiative properties of nanoemitters." Chemical reviews 111, no. 6 (2011): 3888-3912.
1. STEPHAN T. MELNYCHUK stmelnychuk@yahoo.com 760-434-6767
SELECTED PUBLICATIONS:
1. I.V. Fomenkov, N. R. Böwering, C. L. Rettig, S. T. Melnychuk, I. R. Oliver, J. R. Hoffman., O. V. Khodykin, R. M.
Ness, W. Partlo. J. Phys. D, Appl. Phys. 37.( 2004.) 1-11.
2. I.V. Fomenkov, R.M. Ness, I. Oliver, S. T. Melnychuk, O. V. Khodykin, N. R. Böwering, C. L. Rettig, J. R.
Hoffman., Proceedings of SPIE-Emerging Lithographic Technologies VIII, SPIE 5374 (2004).168-82.
3. I.V. Fomenkov, R.M. Ness, I. Oliver, S. T. Melnychuk, O. V. Khodykin, N. R. Böwering, C. L. Rettig, J. R.
Hoffman.” Performance and Scaling of a Dense Plasma Focus Light Source for EUV Lithography” in Proceedings of
SPIE-Emerging Lithographic Technologies VII, SPIE 5037 (2003), 807-21.
4. I. Fomenkov, W. Partlo, R.M. Ness, I. Oliver, S. T. Melnychuk, O. Khodykin, N. Böwering, “Optimization of a
Dense Plasma Focus Device as a Light Source for EUV Lithography” in Proc. of SPIE vol. 4688, Emerging
Lithographic Technologies VI, ed. by R.L. Engelstad, p. 634 (2002).
5. W. N. Partlo, I. V. Fomenkov, R. M. Ness, R. I. Oliver, S. T. Melnychuk, and J. E. Rauch, "Progress Toward Use
of a Dense Plasma Focus as a Light Source for Production EUV Lithography", in Proc. of SPIE vol. 4343, Emerging
Lithographic Technologies V, ed. by E. A. Dobisz, p. 232 (2001).
6. S.T. Melnychuk, L. Wielopolski, and J. Sredniawski “Operating Characteristics of a High Current Tandem
Accelerator for Nitrogen Imaging in the Human Body” to be published in the proceeding of the : Fifth International
Symposium on In Vivo Body Composition Studies (Brookhaven National Laboratory, Upton NY, 7 – 9 October 1999).
7. L. Wielopolski, D. Vartsky, R. Pierson, M. Goldberg, S. Heymsfield, S. Yasumura, S. T. Melnychuk “Gamma
Resonance Absorption, A New Approach in Human Body Composition Studies” to be published in In Vivo Body
Composition Studies v. 904 (Annals of the New York Academy of Sciences (1999)).
8. S.T. Melnychuk, E. Kamykowski, J. Sredniawski, T. Debiak,R. Ruegg, B. Milton, ”Operating Characteristics of a
High Current Electrostatic Accelerator for a Contraband Detection System”, Proceedings of the 1999 IEEE Particle
Accelerator Conference, ed. By: A. Luccio, W. MacKay , (NewYork, 27 March – 2 April 1999) vol. 2, p. 587
(1999).
9. S. T. Melnychuk, R. Meilunas, “Development of a Thin Film 9.17 MeV Gamma Ray Production Target for the
Contraband Detection System” Proceedings of the 1999 IEEE Particle Accelerator Conference, ed. By: A. Luccio,
W. MacKay , (NewYork, 27 March – 2 April 1999) vol. 4, p. 2599 (1999).
10. S. T. Melnychuk, M. D. Cole, and J. J. Sredniawski, “Beam Emittance, Transmission, and Intensity Distribution
Measurements of the Northrop Grumman Corporation 1.76 MeV Pulsed Beamline and Contraband Detection System
Test Facility,” Proceedings of the XVIII International Linear Accelerator Conference (Geneva, Switzerland, 26-30
August 1996) CERN 96 - 07, Vol. 2, p. 476 (1996).
11. S. T. Melnychuk, T. W. Debiak, J. Rathke, and J. J. Sredniawski, “Commissioning of the 40-keV Injector for a
Contraband Detection System Proof-of-Principle Device,” Proceedings of the XVIII International Linear Accelerator
Conference , (Geneva, Switzerland, 26-30 August 1996) CERN 96 - 07, Vol. 2, p. 479 (1996).
12. M. D. Cole, S. T. Melnychuk, Y. Ng, and R. Schmidt, “Status of the 1.76 MeV Pulsed Light Ion Beamline at the
Northrop Grumman Advanced Technology and Development Center,” Proceedings of the XVIII International Linear
Accelerator Conference (Geneva, Switzerland, 26-30 August 1996) CERN 96 - 07, Vol. 1, p. 453 (1996).
13. S. T. Melnychuk, T. W. Debiak, and J. J. Sredniawski, “Operation of a CW RF Driven Ion Source with
Hydrogen and Deuterium Gas,” Rev. Sci. Instrum. 67, 1662 (1996).
14. M. Seidl, H. L. Cui, J. D. Isenberg, H. J. Kwon, B. S. Lee, and S T. Melnychuk, “Negative Surface Ionization of
Hydrogen Atoms and Molecules,” J. Appl. Phys. 79, 2896 (1996).
15. G. Gammel, T. W. Debiak, S. T. Melnychuk, and J. J. Sredniawski, “H- Beam Characteristics from a Cesiated RF
Driven Multicusp Source,” Rev. Sci. Instrum. 65, 1201 (1994).
16. G. Gammel and S. T. Melnychuk, “Focusing of an H- Beam by a Gridded Einzel Lens,” Particles and Fields Series
35, AIP Conf. Proceedings No. 287, Production and Neutralization of Negative Ions and Beams, 6th International
Symposium (BNL, Upton, NY, 1994).
17. S. T. Melnychuk, M. Seidl, “Reflection of Hydrogen Atoms from Alkali and Alkaline Earth Oxide Surfaces,”
J. Vac. Sci. Tech. A9, 1650 (1991).
18. S. T. Melnychuk, M. Seidl, W. Carr, J. Isenberg, and J. Lopes, “Reflection of Hydrogen Atoms from Metal and
Semiconductor Targets,” J. Vac. Sci. Tech. A7, 2127 (1989).
19. M. Seidl, W. E. Carr, J. L. Lopes, S. T. Melnychuk, and G. S. Tompa , “Surface Production of Negative Hydrogen
Ions by Hydrogen and Cesium Ion Bombardment, Particles and Fields Series 35, AIP Conference Proceedings No.
158, Production and Neutralization of Negative Ions and Beams, 4 th International Symposium (BNL, Upton, NY,
1986), p. 432.