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Ultrafast saturable to reverse saturable absorption transition in CoTCPP SURMOF nanofilms and its application to all-optical logic and encryption.

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Title: Ultrafast saturable to reverse saturable absorption transition in CoTCPP SURMOF nanofilms and its application to all-optical logic and encryption.
Authors: Saifi, Anam1 (AUTHOR), Roy, Sukhdev1 (AUTHOR) sukhdevroy@dei.ac.in
Source: Journal of Nonlinear Optical Physics & Materials. Dec2025, Vol. 34 Issue 8, p1-21. 21p.
Subjects: Information technology security, NAND gates, Nanofilms, Laser pulses, Mathematical logic, Logic circuits, Data transmission systems
Abstract: A detailed theoretical analysis of ultrafast intensity-dependent Saturable Absorption (SA) to Reverse Saturable Absorption (RSA) transition in CoTCPP SURMOF nanofilms has been presented with femtosecond (fs) laser pulses at 400 nm. The effect of input pulse intensity, sample thickness, concentration, and 3 rd and 5 th order nonlinear absorption (NLA) coefficients on transmittance has been studied in detail and optimized for high contrast and low-power operation. The maximum modulation achieved for RSA is 55% at 62 GW/cm2. The results have been used to design all-optical fs-NOT, AND, OR, XOR and the universal NOR and NAND logic gates with 400 nm thick CoTCPP SURMOF nanofilms. The modulation achieved for all-optical universal NAND logic gate is 45% at I o = 5 5 GW/cm2. All-optical encryption and decryption for information security has been demonstrated based on all-optical XOR logic gates which offers high bit rate of 9 Tbits/s at I o = 5 5 GW/cm2 for secure data transmission without any optoelectronic conversion delays. An all-optical passive diode has also been theoretically designed with 17 dB nonreciprocity. Ultrafast operation at relatively low input intensities opens up interesting prospects for the applicability of CoTCPP SURMOF nanofilms for ultrafast all-optical computing and information processing. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Nonlinear Optical Physics & Materials is the property of World Scientific Publishing Company 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
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DbLabel: Engineering Source
An: 183895497
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PubTypeId: academicJournal
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  Label: Title
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  Data: Ultrafast saturable to reverse saturable absorption transition in CoTCPP SURMOF nanofilms and its application to all-optical logic and encryption.
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  Data: <searchLink fieldCode="AR" term="%22Saifi%2C+Anam%22">Saifi, Anam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Roy%2C+Sukhdev%22">Roy, Sukhdev</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sukhdevroy@dei.ac.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Nonlinear+Optical+Physics+%26+Materials%22">Journal of Nonlinear Optical Physics & Materials</searchLink>. Dec2025, Vol. 34 Issue 8, p1-21. 21p.
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  Data: <searchLink fieldCode="DE" term="%22Information+technology+security%22">Information technology security</searchLink><br /><searchLink fieldCode="DE" term="%22NAND+gates%22">NAND gates</searchLink><br /><searchLink fieldCode="DE" term="%22Nanofilms%22">Nanofilms</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+pulses%22">Laser pulses</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+logic%22">Mathematical logic</searchLink><br /><searchLink fieldCode="DE" term="%22Logic+circuits%22">Logic circuits</searchLink><br /><searchLink fieldCode="DE" term="%22Data+transmission+systems%22">Data transmission systems</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A detailed theoretical analysis of ultrafast intensity-dependent Saturable Absorption (SA) to Reverse Saturable Absorption (RSA) transition in CoTCPP SURMOF nanofilms has been presented with femtosecond (fs) laser pulses at 400 nm. The effect of input pulse intensity, sample thickness, concentration, and 3 rd and 5 th order nonlinear absorption (NLA) coefficients on transmittance has been studied in detail and optimized for high contrast and low-power operation. The maximum modulation achieved for RSA is 55% at 62 GW/cm2. The results have been used to design all-optical fs-NOT, AND, OR, XOR and the universal NOR and NAND logic gates with 400 nm thick CoTCPP SURMOF nanofilms. The modulation achieved for all-optical universal NAND logic gate is 45% at I o = 5 5 GW/cm2. All-optical encryption and decryption for information security has been demonstrated based on all-optical XOR logic gates which offers high bit rate of 9 Tbits/s at I o = 5 5 GW/cm2 for secure data transmission without any optoelectronic conversion delays. An all-optical passive diode has also been theoretically designed with 17 dB nonreciprocity. Ultrafast operation at relatively low input intensities opens up interesting prospects for the applicability of CoTCPP SURMOF nanofilms for ultrafast all-optical computing and information processing. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Nonlinear Optical Physics & Materials is the property of World Scientific Publishing Company 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.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1142/S0218863524500292
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 21
        StartPage: 1
    Subjects:
      – SubjectFull: Information technology security
        Type: general
      – SubjectFull: NAND gates
        Type: general
      – SubjectFull: Nanofilms
        Type: general
      – SubjectFull: Laser pulses
        Type: general
      – SubjectFull: Mathematical logic
        Type: general
      – SubjectFull: Logic circuits
        Type: general
      – SubjectFull: Data transmission systems
        Type: general
    Titles:
      – TitleFull: Ultrafast saturable to reverse saturable absorption transition in CoTCPP SURMOF nanofilms and its application to all-optical logic and encryption.
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            NameFull: Saifi, Anam
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            NameFull: Roy, Sukhdev
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          Dates:
            – D: 01
              M: 12
              Text: Dec2025
              Type: published
              Y: 2025
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              Value: 34
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              Value: 8
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            – TitleFull: Journal of Nonlinear Optical Physics & Materials
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