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Echo-spectroscopy of dense Yb vapors 致密Yb蒸气的回波光谱
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1117/12.675021
N. Rubtsova, V. N. Ishchenko, E. B. Khvorostov, O. Khasanov, G. Rusetskii
{"title":"Echo-spectroscopy of dense Yb vapors","authors":"N. Rubtsova, V. N. Ishchenko, E. B. Khvorostov, O. Khasanov, G. Rusetskii","doi":"10.1117/12.675021","DOIUrl":"https://doi.org/10.1117/12.675021","url":null,"abstract":"This paper presents the results of transient process investigations in Yb vapors after one- and two-pulse excitations. Transient-four-wave-mixing scheme of excitation including angular photon echo conditions are considered. Spatio-temporal and spectral properties of observed signals are studied. Theoretical interpretation of results includes the local field, excitation induced decay and shift corrections. The situations are analysed when inhomogeneous or homogeneous broadening of spectral line is predominant. The facts of echo signal satellite structure, the signal negative time delay, multiple peaks in the transient-four-wave-mixing spectrum and possibility of echo-like signal observation in homogeneous broadened dense medium have been explained.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132016005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fresnel diffraction from polygonal apertures 菲涅耳衍射从多边形孔径
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567314
Jungang Huang, J. M. Christian, G. S. McDonald
{"title":"Fresnel diffraction from polygonal apertures","authors":"Jungang Huang, J. M. Christian, G. S. McDonald","doi":"10.1109/EQEC.2005.1567314","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567314","url":null,"abstract":"This study presents for the first time, two complementary analytical techniques for calculating the Fresnel diffraction patterns from a polygonal aperture illuminated by a plane wave. These frameworks are exact, in that they do not involve any further approximation beyond the (paraxial) Fresnel integral. Here, regular polygonal apertures are considered. Results are readily extended to describe near-field diffraction from closed apertures of arbitrary shape. These results are of fundamental importance and have specific applications where standard methods, such as fast Fourier transform (FFT) techniques, fail.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130417516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Control of group velocity of light by phase-changing collisions 用相变碰撞控制光的群速度
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567262
A. Wilson-Gordon, C. Goren, M. Rosenbluh, H. Friedmann
{"title":"Control of group velocity of light by phase-changing collisions","authors":"A. Wilson-Gordon, C. Goren, M. Rosenbluh, H. Friedmann","doi":"10.1109/EQEC.2005.1567262","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567262","url":null,"abstract":"This investigation discusses the influence of phase-changing collisions on the probe group velocity in Doppler-broadened, cycling, degenerate two-level systems, with F/sub e/ = F/sub g/ +1 and F/sub g/ > 0, interacting with an intense pump laser and a weak probe laser. In addition, This study demonstrates that a change in sign of the group velocity due to phase-changing also be obtained in realistic atomic systems.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129286550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Generation of quantum correlation between co-propagating pulses in optical fibers 光纤中共传播脉冲间量子相关的产生
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567446
K. Hirosawa, H. Furumochi, A. Tada, S. Taguchi, F. Kannari
{"title":"Generation of quantum correlation between co-propagating pulses in optical fibers","authors":"K. Hirosawa, H. Furumochi, A. Tada, S. Taguchi, F. Kannari","doi":"10.1109/EQEC.2005.1567446","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567446","url":null,"abstract":"Experimental demonstration of more than 50% photon-number squeezing obtained using microstructure fibers (MFs) , of which zero-dispersion wavelength locates at 820 nm, in a spectral filtering scheme with 40-fs laser pulses at /spl lambda/ = 810 nm is reported. The highest photon-number squeezing of -4.6 dB is obtained when a soliton-like Stokes Raman pulse, which broke up from the main pulse, exhibiting a self-frequency shift toward the longer wavelength, is preserved by low-pass spectral filtering from the white-light spectrum generated from the 30-cm MF.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126718550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Conditions for a QND measurement of spin in cold /sup 87/Rb 冷/sup 87/Rb中自旋QND测量的条件
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567442
S. de Echaniz, M. Kubasik, H. Crepaz, M. Mitchell, J. Eschner, E. Polzik
{"title":"Conditions for a QND measurement of spin in cold /sup 87/Rb","authors":"S. de Echaniz, M. Kubasik, H. Crepaz, M. Mitchell, J. Eschner, E. Polzik","doi":"10.1109/EQEC.2005.1567442","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567442","url":null,"abstract":"A scheme to generate spin squeezing via a quantum non-demolition (QND) measurement in a cold sample of /sup 87/Rb atoms is proposed using the /sup 5/S/sub 1/2/ (F = 1) hyperfine ground state. In this system it is expected to have a much higher signal to noise ratio. Suitable Zeeman substates and operators to perform the QND interaction in this scheme are identified, together with the possible sources of error and noise arising from these choices.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126764547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Macroscopic quantum states by the interaction of light with spin oriented atomic ensembles 光与自旋取向原子系综相互作用的宏观量子态
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567430
D. V. Kupriyanov
{"title":"Macroscopic quantum states by the interaction of light with spin oriented atomic ensembles","authors":"D. V. Kupriyanov","doi":"10.1109/EQEC.2005.1567430","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567430","url":null,"abstract":"The process of stimulated cooperative Raman-type scattering of correlated photon pairs is discussed as a physical mechanism for entangling atomic subsystems. The process of coherent forward scattering of light in a polarized atomic gas with an arbitrary angular momentum is also discussed in context of quantum entangling process. The developed general formalism is applied to test the applicability of the spin 1/2 approximation for modelling the quantum non-demolishing measurement in an ensemble of atoms with a higher angular momentum.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123142255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fluorescence methods for matter interferometry with nanosized objects 纳米物体物质干涉测量的荧光方法
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567437
A. Stibor, A. Stefanov, F. Goldfarb, S. Deachapunya, A. Zeilinger, M. Arndt
{"title":"Fluorescence methods for matter interferometry with nanosized objects","authors":"A. Stibor, A. Stefanov, F. Goldfarb, S. Deachapunya, A. Zeilinger, M. Arndt","doi":"10.1109/EQEC.2005.1567437","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567437","url":null,"abstract":"Three different fluorescence detection methods for matter interferometry are explored in the paper. Firstly, molecules can be detected in free flight, when the dilute particle beam is excited by intense laser light. The emitted fluorescent light is collected by a sensitive CCD camera. Secondly, for molecules up to about 1000 amu the molecular interference pattern, with a fringe period of about 1/spl mu/m, can be directly adsorbed on a surface and read out using high-resolution fluorescence microscopy. A third and novel detection scheme combines the high spatial resolution of Talbot Lau interferometry with the high detection efficiency of surface adsorbed fluorophores.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126454682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Applications of a controlled phase gate for photons 光子控制相位门的应用
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567483
N. Kiesel, C. Schmid, U. Weber, G. Tóth, R. Ursin, H. Weinfurter
{"title":"Applications of a controlled phase gate for photons","authors":"N. Kiesel, C. Schmid, U. Weber, G. Tóth, R. Ursin, H. Weinfurter","doi":"10.1109/EQEC.2005.1567483","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567483","url":null,"abstract":"A probabilistic quantum controlled-phase gate for photons operating on the polarization degree of freedom is experimentally implemented. This two qubit gate applies a phase shift of /spl phi/ to a target photon, conditioned on the polarization of a control photon. Its principal architecture follows the approach of J. L. CT Brien et al. who uses however all logic encoding.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121577216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Coherent control of optical transient four-wave mixing interactions with two-color femtosecond laser pulses 双色飞秒激光脉冲光瞬态四波混频作用的相干控制
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567348
C. Serrat
{"title":"Coherent control of optical transient four-wave mixing interactions with two-color femtosecond laser pulses","authors":"C. Serrat","doi":"10.1109/EQEC.2005.1567348","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567348","url":null,"abstract":"In this paper, the effects of propagation in the coherent control of transient four-wave mixing interactions in two-level media are theoretically investigated. Phenomena arising from the coherent control of ultrafast optical interactions can be of extreme importance in fields as diverse as optoelectronics and materials research, in biological applications such as microscopy or spectroscopy, and in high field physics as in high harmonic generation and in photoionization or dissociation.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122574984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Many body and nonparabolicity effects in the intersubband transitions of conduction and valence bands of quantum well media 量子阱介质导价带子带间跃迁中的许多体效应和非抛物效应
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567187
M. F. Pereira, H. Wenzel
{"title":"Many body and nonparabolicity effects in the intersubband transitions of conduction and valence bands of quantum well media","authors":"M. F. Pereira, H. Wenzel","doi":"10.1109/EQEC.2005.1567187","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567187","url":null,"abstract":"This paper highlights the strong band coupling and resulting nonparabolicity and k-dependence of the dipole moments combined with Coulomb corrections, that lead to double features in some of the multiple transitions, which can be measured by comparing and contrasting the evolution of the TE and TM modes with increasing excitation. This work also discusses the combined contributions from both types of subbands to the intersubband transitions including many body effects. Nonparabolicity in all subbands are discussed by means of a strong pump pulse generating electrons in the conduction band and holes in the valence bands, and a weak probe pulse in the infrared. Consequently conduction band signatures are predicted in the TE mode. The overall spectral shape, number of peaks and the relative oscillator strengths of the multiple transitions calculated with and without Coulomb effects are radically different, further highlighting the relevance of the theory.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"103 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126084134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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