Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.237946
D. Hilton, C. L. Tang
Optical orientation of spin-polarized heavy and light holes followed by relaxation to other valence subband states has been observed unambiguously in undoped bulk GaAs. The spin relaxation time for the heavy holes is 110 fs /spl plusmn/ 10%.
{"title":"Optical orientation of spin polarized holes in bulk GaAs","authors":"D. Hilton, C. L. Tang","doi":"10.1109/QELS.2003.237946","DOIUrl":"https://doi.org/10.1109/QELS.2003.237946","url":null,"abstract":"Optical orientation of spin-polarized heavy and light holes followed by relaxation to other valence subband states has been observed unambiguously in undoped bulk GaAs. The spin relaxation time for the heavy holes is 110 fs /spl plusmn/ 10%.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"21 1","pages":"2 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86512960","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.238277
G. von Freymann, W. Koch, D. Meisel, M. Wegener, M. Diem, A. García-Martín, S. Pereira, K. Busch, J. Schilling, R. Wehrspohn, U. Gosele
The angle dependent diffraction efficiency of 2D photonic crystals is measured to be lower than 5/spl middot/10-4 for certain frequencies and unity spectrally nearby in good agreement with numerical calculations, whereby the surface termination is crucial.
{"title":"Angle- and spectrally-resolved Bragg scattering on two-dimensional silicon-based photonic crystals","authors":"G. von Freymann, W. Koch, D. Meisel, M. Wegener, M. Diem, A. García-Martín, S. Pereira, K. Busch, J. Schilling, R. Wehrspohn, U. Gosele","doi":"10.1109/QELS.2003.238277","DOIUrl":"https://doi.org/10.1109/QELS.2003.238277","url":null,"abstract":"The angle dependent diffraction efficiency of 2D photonic crystals is measured to be lower than 5/spl middot/10-4 for certain frequencies and unity spectrally nearby in good agreement with numerical calculations, whereby the surface termination is crucial.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"41 1","pages":"2 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90498746","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.238329
E. Nibbering, N. Huse, K. Heyne, T. Elsaesser
Coherent vibrational motions along intermolecular hydrogen bonds are observed in mid-infrared pump-probe and photon echo experiments. The underlying low-frequency modes couple anharmonically to the O-H stretching mode and dephase much slower than the O-H stretching mode.
{"title":"Ultrafast coherent vibrational response of intermolecular hydrogen bonded molecular complexes in solution","authors":"E. Nibbering, N. Huse, K. Heyne, T. Elsaesser","doi":"10.1109/QELS.2003.238329","DOIUrl":"https://doi.org/10.1109/QELS.2003.238329","url":null,"abstract":"Coherent vibrational motions along intermolecular hydrogen bonds are observed in mid-infrared pump-probe and photon echo experiments. The underlying low-frequency modes couple anharmonically to the O-H stretching mode and dephase much slower than the O-H stretching mode.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"1 1","pages":"2 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88830781","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.238172
J. Bochinski, E. Hudson, J. Ye
Our latest work towards utilizing Stark deceleration on a beam of molecular free radicals is presented. Observed signal enhancement using hexapole focusing and the necessary phase space matching conditions are discussed.
{"title":"Stark manipulation of the free radical OH","authors":"J. Bochinski, E. Hudson, J. Ye","doi":"10.1109/QELS.2003.238172","DOIUrl":"https://doi.org/10.1109/QELS.2003.238172","url":null,"abstract":"Our latest work towards utilizing Stark deceleration on a beam of molecular free radicals is presented. Observed signal enhancement using hexapole focusing and the necessary phase space matching conditions are discussed.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"8 2 1","pages":"2 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83667451","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.238575
C. Xie, M.A. Dinno, Yong-qing Li
We demonstrate that single living cells and single organelles within a cell can be manipulated with a near-infrared beam and Raman spectra of the trapped particles can be collected to offer biochemical composition for rapid identification of microorganisms and real-time analysis.
{"title":"Optical trapping and Raman spectroscopy of single living cells and single organelles","authors":"C. Xie, M.A. Dinno, Yong-qing Li","doi":"10.1109/QELS.2003.238575","DOIUrl":"https://doi.org/10.1109/QELS.2003.238575","url":null,"abstract":"We demonstrate that single living cells and single organelles within a cell can be manipulated with a near-infrared beam and Raman spectra of the trapped particles can be collected to offer biochemical composition for rapid identification of microorganisms and real-time analysis.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"8 1","pages":"2 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89831474","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.238284
R. Netz, A. Nazarkin, R. Sauerbrey
A new selective excitation technique using a superposition of two identical frequency-chirped pulses is demonstrated. By adjusting the time delay between the two pulses, a selected transition of the Rb doublet was brought into the "holes" of the interference pattern and remained nonexcited, thus allowing to manipulate another transition by the laser field as if it is an isolated two-level system.
{"title":"Fs time-resolved selective control of multilevel systems using optical interference","authors":"R. Netz, A. Nazarkin, R. Sauerbrey","doi":"10.1109/QELS.2003.238284","DOIUrl":"https://doi.org/10.1109/QELS.2003.238284","url":null,"abstract":"A new selective excitation technique using a superposition of two identical frequency-chirped pulses is demonstrated. By adjusting the time delay between the two pulses, a selected transition of the Rb doublet was brought into the \"holes\" of the interference pattern and remained nonexcited, thus allowing to manipulate another transition by the laser field as if it is an isolated two-level system.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"1 1","pages":"2 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89912601","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.238272
P. Chak, J. Sipe, S. Pereira
We present a Hamiltonian description of the optical properties of structures composed of channel waveguides and microresonators. From the Hamiltonian we extract highly accurate formulae for the dispersion relation of the structures.
{"title":"Hamiltonian formulation for light propagation in waveguide-microresonator structures","authors":"P. Chak, J. Sipe, S. Pereira","doi":"10.1109/QELS.2003.238272","DOIUrl":"https://doi.org/10.1109/QELS.2003.238272","url":null,"abstract":"We present a Hamiltonian description of the optical properties of structures composed of channel waveguides and microresonators. From the Hamiltonian we extract highly accurate formulae for the dispersion relation of the structures.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"35 1","pages":"3 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90857471","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.237901
N. Belabas, M. Joffre
We report on a new class of optical multidimensional Fourier-transform spectroscopy associated with a visible excitation infrared emission configuration, in which the emitted field results from second-order optical nonlinearities.
{"title":"Two-dimensional IR/visible measurements of /spl chi//sup 2/","authors":"N. Belabas, M. Joffre","doi":"10.1109/QELS.2003.237901","DOIUrl":"https://doi.org/10.1109/QELS.2003.237901","url":null,"abstract":"We report on a new class of optical multidimensional Fourier-transform spectroscopy associated with a visible excitation infrared emission configuration, in which the emitted field results from second-order optical nonlinearities.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"33 1","pages":"3 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89701947","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.238124
V. Lorenz, D.S. Kim, S. Cundiff
We investigate the interference between virtual and real population amplitudes in a dense potassium vapor using transient four-wave mixing with shaped pulses. Results for the D/sub 1/ line agree with theory, but D/sub 2/ results behave anomalously.
{"title":"Virtual-real interference in a dense potassium vapor","authors":"V. Lorenz, D.S. Kim, S. Cundiff","doi":"10.1109/QELS.2003.238124","DOIUrl":"https://doi.org/10.1109/QELS.2003.238124","url":null,"abstract":"We investigate the interference between virtual and real population amplitudes in a dense potassium vapor using transient four-wave mixing with shaped pulses. Results for the D/sub 1/ line agree with theory, but D/sub 2/ results behave anomalously.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"56 1","pages":"2 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90458936","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}
Pub Date : 2003-06-06DOI: 10.1109/QELS.2003.238155
J. Haus, R. Nelson
Electro-optic phase modulation in one-dimensional photonic crystals with the possibility of total internal reflection is investigated. The compactness and other design features of this type of modulation can offer significant advantages over present modulation schemes.
{"title":"Electro-optics in a one dimensional photonic crystals","authors":"J. Haus, R. Nelson","doi":"10.1109/QELS.2003.238155","DOIUrl":"https://doi.org/10.1109/QELS.2003.238155","url":null,"abstract":"Electro-optic phase modulation in one-dimensional photonic crystals with the possibility of total internal reflection is investigated. The compactness and other design features of this type of modulation can offer significant advantages over present modulation schemes.","PeriodicalId":20418,"journal":{"name":"Postconference Digest Quantum Electronics and Laser Science, 2003. QELS.","volume":"443 1","pages":"2 pp.-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76964283","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}
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