Browsing by Author "Welch, George R."
Now showing items 1-20 of 47
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Hua, Xia (2010-10-12)Genetic algorithm is often used to find the global optimum in a multi-dimensional search problem. Inspired by the natural evolution process, this algorithm employs three reproduction strategies -- cloning, crossover and ...
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Rodolfo, Barron Jimenez (Texas A&M University, 2005-02-17)An all-solid-state continuous-wave (cw) laser system for mid-infrared absorption measurements of the carbon monoxide (CO) molecule has been developed and demonstrated. The single-mode, tunable output of an external-cavity ...
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Kuznetsova, Yelena Anatolyevna (Texas A&M University, 2005-08-29)In this work, interference and coherence phenomena, appearing in atomic and molecular ensembles interacting with coherent light sources, as electromagnetically induced transparency (EIT), coherent population trapping (CPT), ...
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Mikhailov, E. E.; Novikova, I.; Rostovtsev, Y. V.; Welch, George R. (American Physical Society, 2004)We observe transformation of the electromagnetically induced transparency (EIT) resonance into an absorption resonance in a Lambda interaction configuration in a cell filled with Rb-87 and a buffer gas. This transformation ...
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Li, Hebin; Sautenkov, Vladimir A.; Rostovtsev, Yuri V.; Kash, Michael M.; Anisimov, Petr M.; Welch, George R.; Scully, Marlan O. (Physical Review Letters, 2010)
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Chang, Juntao (2009-05-15)Cooperative effect in the radiation process has been studied in for more than half a century. It is important in the sense of both basic physics and applied science. In this work, we study the dynamics of the cooperative ...
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Xiong, Han (Texas A&M University, 2006-08-16)Coherence and entanglement are the two key concepts that distinguish quantum mechanics from classical mechanics. Many novel phenomena occuring in the quantum world are due to these two Âphysical quantitiesÂ. They also ...
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Wang, Xi (2012-07-16)The purpose of this work is to study the interference between the coherent nonresonant four-wave-mixing (FWM) background and the Raman-resonant signal in the coherent anti-Stokes Raman spectroscopy (CARS). The nonresonant ...
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Li, Hebin (2011-08-08)Coherent effects are studied in a dense atomic vapor driven by laser fields. With optical properties dramatically modified by these effects, the medium can be used to manipulate some of the properties of laser field. Our ...
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O'Brien, Christopher Michael (2012-02-14)The resonant absorption, emission, and scattering of light are the fundamental optical processes that have been used both to probe matter and to manipulate light itself. In the last decade there has been essential progress ...
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Sariyanni, Zoe-Elizabeth (Texas A&M University, 2006-10-30)In the present quantum optics and laser physics study, the non-linear interaction of electromagnetic fields with atomic, molecular and biomolecular media is analyzed. Particular emphasis is given to coherent phenomena, ...
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Novikova, I.; Matsko, A. B.; Velichansky, V. L.; Scully, Marlan O.; Welch, George R. (American Physical Society, 2001)The ac Stark shift of the resonance frequency of the nonlinear magneto-optic effect (NMOE) results in a fundamental broadening of this resonance which limits the precision of optical magnetometry based on NMOE. We have ...
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Yi, Zhenhuan (2016-05-04)Enhancing optical signal is a subject of long term interest with many applications, such as trace chemical detection in the lab and standoff detection in the atmosphere. It is well known that optical properties of multi-level ...
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Li, Hebin; Sautenkov, Vladimir A.; Rostovtsev, Yuri V.; Welch, George R.; Hemmer, Philip R.; Scully, Marlan O. (American Physical Society, 2009)We have experimentally studied the propagation of two optical fields in a dense rubidium (Rb) gas in the case when an additional microwave field is coupled to the hyperfine levels of Rb atoms. The Rb energy levels form a ...
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Sautenkov, V. A.; Rostovtsev, Y. V.; Ye, C. Y.; Welch, George R.; Kocharovskaya, O.; Scully, Marlan O. (American Physical Society, 2005)It was shown by Kocharovskaya and Khanin [Sov. Phys. JETP 63, 945 (1986)] that a comb of optical pulses can induce a ground-state atomic coherence and change the optical response of an atomic medium. In our experiment, we ...
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Hanna, Sherif Fayez (Texas A&M University, 2006-10-30)The application of electronic-resonance enhanced (ERE) coherent anti-Stokes Raman scattering (CARS) for the detection of nitric oxide (NO) and acetylene (C2H2) is experimentally demonstrated and the effects of various ...
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Sautenkov, V. A.; Ye, C. Y.; Rostovtsev, Y. V.; Welch, George R.; Scully, Marlan O. (American Physical Society, 2004)We have experimentally demonstrated the enhancement of coherent Raman scattering in Rb atomic vapor by exciting maximal atomic coherence with fractional stimulated Raman adiabatic passage. Experimental results are in good ...
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Sautenkov, V. A.; Lukin, M. D.; Bednar, CJ; Novikova, I.; Mikhailov, E.; Fleischhauer, M.; Velichansky, V. L.; Welch, George R.; Scully, Marlan O. (American Physical Society, 2000)We utilize the generation of large atomic coherence in optically dense media to enhance the resonant nonlinear magneto-optic effect by several orders of magnitude, thereby eliminating power broadening and improving the ...
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Sun, Dong (2012-02-14)Quantum coherence and interference(QCI) effects have been studied for decades and are widely exploited in many areas. For media with QCI effect, the optical properties can change drastically, which leads to many interesting ...
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Aardema, Megan Nicole (2023-07-11)Understanding ozone photodissociation dynamics is a key component to accurately modeling atmospheric chemistry, and the energy partitioning into the fragments and its wave-length dependence can be used to assess the potential ...