View in EDS

All-optical switching in bacteriorhodopsin based on M state dynamics and its application to photonic logic gates

Saved in:
Bibliographic Details
Title: All-optical switching in bacteriorhodopsin based on M state dynamics and its application to photonic logic gates
Authors: Singh, Chandra Pal1, Roy, Sukhdev sukhdevr@hotmail.com
Source: Optics Communications. Mar2003, Vol. 218 Issue 1-3, p55. 12p.
Subjects: Nonlinear optics, Bacteriorhodopsin
Abstract: All-optical switching has been theoretically analyzed in bacteriorhodopsin (bR) based on nonlinear intensity induced excited state absorption of the M state. The transmission of a cw probe laser beam at 410 nm corresponding to the peak absorption of M state through a bR film is switched by a pulsed pump laser beam at 570 nm that corresponds to the maximum initial B state absorption. The switching characteristics have been numerically simulated using the rate equation approach considering all the six intermediate states (B, K, L, M, N and O) in the bR photocycle. The switching characteristics are shown to be sensitive to various parameters such as the pump pulse width, pump intensity, life time of the M state, thickness of the film and absorption cross-section of the B-state at probe wavelength (σBp). It has been shown that the probe laser beam can be completely switched off (100% modulation) by the pump laser beam at relatively low pump powers, for σBp=0. The switching characteristics have also been used to theoretically design all-optical NOT, OR, AND and the universal NOR and NAND logic gates with two pulsed pump laser beams using the six state model. [Copyright &y& Elsevier]
Copyright of Optics Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 9232192
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: All-optical switching in bacteriorhodopsin based on M state dynamics and its application to photonic logic gates
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Singh%2C+Chandra+Pal%22">Singh, Chandra Pal</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Roy%2C+Sukhdev%22">Roy, Sukhdev</searchLink><i> sukhdevr@hotmail.com</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Optics+Communications%22">Optics Communications</searchLink>. Mar2003, Vol. 218 Issue 1-3, p55. 12p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Nonlinear+optics%22">Nonlinear optics</searchLink><br /><searchLink fieldCode="DE" term="%22Bacteriorhodopsin%22">Bacteriorhodopsin</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: All-optical switching has been theoretically analyzed in bacteriorhodopsin (bR) based on nonlinear intensity induced excited state absorption of the M state. The transmission of a cw probe laser beam at 410 nm corresponding to the peak absorption of M state through a bR film is switched by a pulsed pump laser beam at 570 nm that corresponds to the maximum initial B state absorption. The switching characteristics have been numerically simulated using the rate equation approach considering all the six intermediate states (B, K, L, M, N and O) in the bR photocycle. The switching characteristics are shown to be sensitive to various parameters such as the pump pulse width, pump intensity, life time of the M state, thickness of the film and absorption cross-section of the B-state at probe wavelength (<f>σBp</f>). It has been shown that the probe laser beam can be completely switched off (100% modulation) by the pump laser beam at relatively low pump powers, for <f>σBp=0</f>. The switching characteristics have also been used to theoretically design all-optical NOT, OR, AND and the universal NOR and NAND logic gates with two pulsed pump laser beams using the six state model. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Optics Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=9232192
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/S0030-4018(03)01169-6
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 55
    Subjects:
      – SubjectFull: Nonlinear optics
        Type: general
      – SubjectFull: Bacteriorhodopsin
        Type: general
    Titles:
      – TitleFull: All-optical switching in bacteriorhodopsin based on M state dynamics and its application to photonic logic gates
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Singh, Chandra Pal
      – PersonEntity:
          Name:
            NameFull: Roy, Sukhdev
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 15
              M: 03
              Text: Mar2003
              Type: published
              Y: 2003
          Identifiers:
            – Type: issn-print
              Value: 00304018
          Numbering:
            – Type: volume
              Value: 218
            – Type: issue
              Value: 1-3
          Titles:
            – TitleFull: Optics Communications
              Type: main
ResultId 1