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Sheng CX, Kim KH, Tong M, Yang C, Kang H, Park YW, Vardeny ZV. Ultrafast Transient Spectroscopy of Trans-Polyacetylene in the Midinfrared Spectral Range. PHYSICAL REVIEW LETTERS 2020; 124:017401. [PMID: 31976729 DOI: 10.1103/physrevlett.124.017401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/11/2019] [Indexed: 06/10/2023]
Abstract
Trans-polyacetylene [t-(CH)_{x}] possesses twofold ground state degeneracy. Using the Su-Schrieffer-Heeger Hamiltonian, scientists predicted charged solitons to be the primary photoexcitations in t-(CH)_{x}; this prediction, however, has led to sharp debate. To resolve this saga, we use subpicosecond transient photomodulation spectroscopy in the mid-IR spectral range (0.1-1.5 eV) in neat t-(CH)_{x} thin films. We show that odd-parity singlet excitons are the primary photoexcitations in t-(CH)_{x}, similar to many other nondegenerate π-conjugated polymers. The exciton transitions are characterized by two photoinduced absorption (PA) bands at 0.38 and 0.6 eV, and an associated photoluminescence band at ∼1.5 eV having similar polarization memory. The primary excitons undergo internal conversion within ∼100 fs to an even-parity (dark) singlet exciton with a PA band at ∼1.4 eV. We also find ultrafast photogeneration of charge polarons when pumping deep into the polymer continuum band, which are characterized by two other PA bands in the mid-IR and associated photoinduced IR vibrational modes.
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Affiliation(s)
- C X Sheng
- Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
| | - K H Kim
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - M Tong
- Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - C Yang
- Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - H Kang
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
| | - Y W Park
- Institute of Applied Physics, Seoul National University, Seoul 08826, Korea
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Z V Vardeny
- Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
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Gieseking RL, Mukhopadhyay S, Risko C, Marder SR, Brédas JL. 25th anniversary article: Design of polymethine dyes for all-optical switching applications: guidance from theoretical and computational studies. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:68-83. [PMID: 24302357 DOI: 10.1002/adma.201302676] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 07/29/2013] [Indexed: 06/02/2023]
Abstract
All-optical switching--controlling light with light--has the potential to meet the ever-increasing demand for data transmission bandwidth. The development of organic π-conjugated molecular materials with the requisite properties for all-optical switching applications has long proven to be a significant challenge. However, recent advances demonstrate that polymethine dyes have the potential to meet the necessary requirements. In this review, we explore the theoretical underpinnings that guide the design of π-conjugated materials for all-optical switching applications. We underline, from a computational chemistry standpoint, the relationships among chemical structure, electronic structure, and optical properties that make polymethines such promising materials.
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Affiliation(s)
- Rebecca L Gieseking
- School of Chemistry and Biochemistry Center for Organic Photonics and Electronics and Center for Organic Materials for All-Optical Switching, Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, USA
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Guo D. An Essential States Mechanism for Optical Non-Linearity in Conjugated Polymers. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259408039237] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Dandan Guo
- a Department of Physics , University of Illinois , Urbana , IL , 61801 , U.S.A
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Yang K, Kumar J, Lee DC, Sandman DJ, Tripathy S. Determining the dispersions of the fifth- and seventh-order nonlinear optical susceptibilities of a poly(4-BCMU) film through electroabsorption spectroscopy. OPTICS LETTERS 2000; 25:1186-1188. [PMID: 18066162 DOI: 10.1364/ol.25.001186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The dispersions of the fifth- and seventh-order nonlinear optical susceptibilities, chi((5))(113333) and chi((7))(11333333) , respectively, of a polydiacetylene film, poly(4-BCMU), are determined through electroabsorption spectroscopy. To our knowledge this is the first time that a spectrum of seventh-order nonlinear optical susceptibility has been obtained by means of electro-optic measurements.
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He JA, Yang K, Kumar J, Tripathy SK, Samuelson LA, Oshikiri T, Katagi H, Kasai H, Okada S, Oikawa H, Nakanashi H. Electrostatic Self-Assembly of Polydiacetylene Nanocrystals: Nonlinear Optical Properties and Chain Orientation. J Phys Chem B 1999. [DOI: 10.1021/jp992633+] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Beljonne D, Shuai Z, Cornil J, dos Santos DA, Brédas JL. On the nature of electronic excitations in poly(paraphenylenevinylene): A quantum-chemical investigation. J Chem Phys 1999. [DOI: 10.1063/1.479560] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Yang CJ, Jenekhe SA, Meth JS, Vanherzeele H. Probing Structure−Property Relationships in Third-Order Nonlinear Optical Polymers: Third Harmonic Generation Spectroscopy and Theoretical Modeling of Systematically Derivatized Conjugated Aromatic Polyimines. Ind Eng Chem Res 1999. [DOI: 10.1021/ie970581+] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shakin VA, Abe S, Kobayashi T. Nonlinear optical susceptibilities of conjugated polymers: Damping, resonances, and scaling laws. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:10656-10666. [PMID: 9982630 DOI: 10.1103/physrevb.53.10656] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Response Theory and Calculations of Molecular Hyperpolarizabilities. ADVANCES IN QUANTUM CHEMISTRY 1995. [DOI: 10.1016/s0065-3276(08)60113-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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Electronic spectra of finite polyenes and polyacetylene obtained by electron and polarization propagator calculations. Theor Chem Acc 1994. [DOI: 10.1007/bf01114106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Guo F, Guo D, Mazumdar S. Intensities of two-photon absorptions to low-lying even-parity states in linear-chain conjugated polymers. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:10102-10112. [PMID: 10009827 DOI: 10.1103/physrevb.49.10102] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hagler TW, Pakbaz K, Heeger AJ. Polarized-electroabsorption spectroscopy of a soluble derivative of poly(p-phenylenevinylene) oriented by gel processing in polyethylene: Polarization anisotropy, the off-axis dipole moment, and excited-state delocalization. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:10968-10975. [PMID: 10009939 DOI: 10.1103/physrevb.49.10968] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Comoretto D, Cuniberti C, Musso GF, Dellepiane G, Speroni F, Botta C, Luzzati S. Optical properties and long-lived charged photoexcitations in polydiacetylenes. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:8059-8066. [PMID: 10009569 DOI: 10.1103/physrevb.49.8059] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mazumdar S, Guo F. Observation of three resonances in the third harmonic generation spectrum of conjugated polymers: Evidence for the four‐level essential states model. J Chem Phys 1994. [DOI: 10.1063/1.466594] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Leng JM, Jeglinski S, Wei X, Benner RE, Vardeny ZV, Guo F, Mazumdar S. Optical probes of excited states in poly(p-phenylenevinylene). PHYSICAL REVIEW LETTERS 1994; 72:156-159. [PMID: 10055590 DOI: 10.1103/physrevlett.72.156] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Guo D, Mazumdar S, Dixit SN, Kajzar F, Jarka F, Kawabe Y, Peyghambarian N. Role of the conduction band in electroabsorption, two-photon absorption, and third-harmonic generation in polydiacetylenes. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:1433-1459. [PMID: 10008503 DOI: 10.1103/physrevb.48.1433] [Citation(s) in RCA: 87] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Location of the lowest even parity excited singlet state in poly(p-phenylenevinylene) by two-photon fluorescence spectroscopy. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)85045-p] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Mazumdar S, Guo D, Dixit SN. High energy two‐photon states in finite versus infinite polyenes. J Chem Phys 1992. [DOI: 10.1063/1.462576] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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