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  1. Article ; Online: Optical temperature sensing by tuning photoluminescence in a wide (visible to near infrared) wavelength range in a Eu

    De, Arnab / Mishra, Anupam / Khatua, Dipak Kumar / Dwij, Vivek / Sathe, Vasant / Jena, Satyam / Ranjan, Rajeev

    Optics letters

    2021  Volume 47, Issue 3, Page(s) 489–492

    Abstract: The prevalent material design principles for optical thermometry primarily rely on thermally driven changes in the relative intensities of the thermally coupled levels (TCLs) of rare-earth-doped phosphor materials, where the maximum achievable ... ...

    Abstract The prevalent material design principles for optical thermometry primarily rely on thermally driven changes in the relative intensities of the thermally coupled levels (TCLs) of rare-earth-doped phosphor materials, where the maximum achievable sensitivity is limited by the energy gap between the TCLs. In this work, a new, to the best of our knowledge, approach to thermometric material design is proposed, which is based on temperature tuning of PL emission from the visible to the NIR region. We demonstrate a model ferroelectric phosphor, Eu
    Language English
    Publishing date 2021-08-09
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.441377
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Tuning Photoluminescence Response by Electric Field in Electrically Soft Ferroelectrics.

    Khatua, Dipak Kumar / Kalaskar, Abhijeet / Ranjan, Rajeev

    Physical review letters

    2016  Volume 116, Issue 11, Page(s) 117601

    Abstract: We show that an electrically soft ferroelectric host can be used to tune the photoluminescence (PL) response of rare-earth emitter ions by external electric field. The proof of this concept is demonstrated by changing the PL response of the Eu^{3+} ion ... ...

    Abstract We show that an electrically soft ferroelectric host can be used to tune the photoluminescence (PL) response of rare-earth emitter ions by external electric field. The proof of this concept is demonstrated by changing the PL response of the Eu^{3+} ion by electric field on a model system Eu-doped 0.94(Na_{1/2}Bi_{1/2}TiO_{3})-0.06(BaTiO_{3}). We also show that new channels of radiative transitions, forbidden otherwise, open up due to positional disorder in the system, which can as well be tuned by electric field.
    Language English
    Publishing date 2016-03-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.116.117601
    Database MEDical Literature Analysis and Retrieval System OnLINE

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