Observation of enhanced bleaching and fast recovery in CdS0.4Se0.6 nanocrystals

Young Nam Hwang, Cheon Min Kim, Sae Chae Jeoung, Dongho Kim, Seung Han Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Semiconductor nanocrystals have been a subject of increasing interest due to various unique physical properties. Besides the quantum confinement in all three dimensions, various trapping processes are important factors to understand the ultrafast carrier dynamics in nanocrystals. The trapping into the surface states has been suggested to be a possible deactivation channel for the fast carrier relaxation in band-edge photoluminescence. Moreover, it is reported that photodarkening due to two photon absorption has been observed by trapping electrons into the glass electronic states. In our experiment, femtosecond transient absorption of CdS0.4Se0.6 nanocrystals in a glass matrix (Schott Glass RG630) has been measured to study the trapping effect on the bleaching dynamics.

Original languageEnglish
Title of host publicationCLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages551-552
Number of pages2
Volume2
ISBN (Electronic)0780356616, 9780780356610
DOIs
Publication statusPublished - 1999 Jan 1
Event1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999 - Seoul, Korea, Republic of
Duration: 1999 Aug 301999 Sep 3

Other

Other1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999
CountryKorea, Republic of
CitySeoul
Period99/8/3099/9/3

Fingerprint

bleaching
Bleaching
Nanocrystals
nanocrystals
recovery
trapping
Recovery
Glass
Photochromism
glass
Quantum confinement
Surface states
Electronic states
Photoluminescence
Photons
Physical properties
deactivation
Semiconductor materials
Electrons
physical properties

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Networks and Communications
  • Physics and Astronomy(all)

Cite this

Hwang, Y. N., Kim, C. M., Jeoung, S. C., Kim, D., & Park, S. H. (1999). Observation of enhanced bleaching and fast recovery in CdS0.4Se0.6 nanocrystals. In CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics (Vol. 2, pp. 551-552). [811565] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CLEOPR.1999.811565
Hwang, Young Nam ; Kim, Cheon Min ; Jeoung, Sae Chae ; Kim, Dongho ; Park, Seung Han. / Observation of enhanced bleaching and fast recovery in CdS0.4Se0.6 nanocrystals. CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics. Vol. 2 Institute of Electrical and Electronics Engineers Inc., 1999. pp. 551-552
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abstract = "Semiconductor nanocrystals have been a subject of increasing interest due to various unique physical properties. Besides the quantum confinement in all three dimensions, various trapping processes are important factors to understand the ultrafast carrier dynamics in nanocrystals. The trapping into the surface states has been suggested to be a possible deactivation channel for the fast carrier relaxation in band-edge photoluminescence. Moreover, it is reported that photodarkening due to two photon absorption has been observed by trapping electrons into the glass electronic states. In our experiment, femtosecond transient absorption of CdS0.4Se0.6 nanocrystals in a glass matrix (Schott Glass RG630) has been measured to study the trapping effect on the bleaching dynamics.",
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Hwang, YN, Kim, CM, Jeoung, SC, Kim, D & Park, SH 1999, Observation of enhanced bleaching and fast recovery in CdS0.4Se0.6 nanocrystals. in CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics. vol. 2, 811565, Institute of Electrical and Electronics Engineers Inc., pp. 551-552, 1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999, Seoul, Korea, Republic of, 99/8/30. https://doi.org/10.1109/CLEOPR.1999.811565

Observation of enhanced bleaching and fast recovery in CdS0.4Se0.6 nanocrystals. / Hwang, Young Nam; Kim, Cheon Min; Jeoung, Sae Chae; Kim, Dongho; Park, Seung Han.

CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics. Vol. 2 Institute of Electrical and Electronics Engineers Inc., 1999. p. 551-552 811565.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Hwang YN, Kim CM, Jeoung SC, Kim D, Park SH. Observation of enhanced bleaching and fast recovery in CdS0.4Se0.6 nanocrystals. In CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics. Vol. 2. Institute of Electrical and Electronics Engineers Inc. 1999. p. 551-552. 811565 https://doi.org/10.1109/CLEOPR.1999.811565