Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals
This paper reports optical properties of a single crystal thiophene/phenylene co-polymer 5,5ʺʺ'-diphenyl-2,2′:5′,2ʺ:5ʺ,2ʺ′:5ʺ′,2ʺʺ:5ʺʺ, 2ʺʺ'-sexithiophene (P6T). The P6T crystals demonstrate high charge carriers’ mobility and large photoluminescence quantum efficiency (PLQE). Herein, the s...
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| Format: | Article |
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Elsevier
2020
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| author | Tahir, Muhammad Sayyad, Muhammad Hassan Said, Suhana Mohd Sabri, Mohd Faizul Mohd Sarker, Md Mahidur Rahman |
| author_facet | Tahir, Muhammad Sayyad, Muhammad Hassan Said, Suhana Mohd Sabri, Mohd Faizul Mohd Sarker, Md Mahidur Rahman |
| author_sort | Tahir, Muhammad |
| collection | UM |
| description | This paper reports optical properties of a single crystal thiophene/phenylene co-polymer 5,5ʺʺ'-diphenyl-2,2′:5′,2ʺ:5ʺ,2ʺ′:5ʺ′,2ʺʺ:5ʺʺ, 2ʺʺ'-sexithiophene (P6T). The P6T crystals demonstrate high charge carriers’ mobility and large photoluminescence quantum efficiency (PLQE). Herein, the stimulated emission of P6T is studied within wide range of pump energies –refers to energy per pulse – (from 19 ± 0.5 μJ/cm2 to 64.2 ± 0.5 μJ/cm2) through amplified spontaneous emission (ASE) measurements by using Nd-YAG femtoseconds tunable pulsed laser at 445 nm excitation wavelength (λexc). ASE measurements exhibit lower threshold energy density (Eth) i.e., ~26 ± 0.5 μJ/cm2 which confirms optical amplification in P6T at 632 nm emission wavelength. The ASE characteristics of P6T are also studied as a function of different λexc ranging from 425 to 475 nm to find the wavelength for optimum amplification. It is observed that the maximum optical amplification for P6T occurs at a λexc of 445 nm. These crystals exhibit large optical gains which are measured to be 69 cm−1, 53 cm−1 and 29 cm−1 at excitation energies of 91 ± 0.5 μJ/cm2, 66 ± 0.5 μJ/cm2 and 43 ± 0.5 μJ/cm2, respectively. PL measurements of P6T crystals demonstrate large value of the PLQE ~57.36%. This study suggests the potential of P6T single crystal as one of the good candidates among high optical gain materials of its kind for its possible applications in solid-state lasers, photodetectors and optical amplifiers. © 2020 |
| first_indexed | 2024-03-06T06:03:56Z |
| format | Article |
| id | um.eprints-24847 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T06:03:56Z |
| publishDate | 2020 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | um.eprints-248472020-06-16T02:46:05Z http://eprints.um.edu.my/24847/ Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals Tahir, Muhammad Sayyad, Muhammad Hassan Said, Suhana Mohd Sabri, Mohd Faizul Mohd Sarker, Md Mahidur Rahman TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering This paper reports optical properties of a single crystal thiophene/phenylene co-polymer 5,5ʺʺ'-diphenyl-2,2′:5′,2ʺ:5ʺ,2ʺ′:5ʺ′,2ʺʺ:5ʺʺ, 2ʺʺ'-sexithiophene (P6T). The P6T crystals demonstrate high charge carriers’ mobility and large photoluminescence quantum efficiency (PLQE). Herein, the stimulated emission of P6T is studied within wide range of pump energies –refers to energy per pulse – (from 19 ± 0.5 μJ/cm2 to 64.2 ± 0.5 μJ/cm2) through amplified spontaneous emission (ASE) measurements by using Nd-YAG femtoseconds tunable pulsed laser at 445 nm excitation wavelength (λexc). ASE measurements exhibit lower threshold energy density (Eth) i.e., ~26 ± 0.5 μJ/cm2 which confirms optical amplification in P6T at 632 nm emission wavelength. The ASE characteristics of P6T are also studied as a function of different λexc ranging from 425 to 475 nm to find the wavelength for optimum amplification. It is observed that the maximum optical amplification for P6T occurs at a λexc of 445 nm. These crystals exhibit large optical gains which are measured to be 69 cm−1, 53 cm−1 and 29 cm−1 at excitation energies of 91 ± 0.5 μJ/cm2, 66 ± 0.5 μJ/cm2 and 43 ± 0.5 μJ/cm2, respectively. PL measurements of P6T crystals demonstrate large value of the PLQE ~57.36%. This study suggests the potential of P6T single crystal as one of the good candidates among high optical gain materials of its kind for its possible applications in solid-state lasers, photodetectors and optical amplifiers. © 2020 Elsevier 2020 Article PeerReviewed Tahir, Muhammad and Sayyad, Muhammad Hassan and Said, Suhana Mohd and Sabri, Mohd Faizul Mohd and Sarker, Md Mahidur Rahman (2020) Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals. Optical Materials, 100. p. 109695. ISSN 0925-3467, DOI https://doi.org/10.1016/j.optmat.2020.109695 <https://doi.org/10.1016/j.optmat.2020.109695>. https://doi.org/10.1016/j.optmat.2020.109695 doi:10.1016/j.optmat.2020.109695 |
| spellingShingle | TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering Tahir, Muhammad Sayyad, Muhammad Hassan Said, Suhana Mohd Sabri, Mohd Faizul Mohd Sarker, Md Mahidur Rahman Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals |
| title | Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals |
| title_full | Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals |
| title_fullStr | Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals |
| title_full_unstemmed | Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals |
| title_short | Amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals |
| title_sort | amplified spontaneous emission and optical gain characteristics of sexithiophene single crystals |
| topic | TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering |
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