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Three-photon absorption in seeded CdSe/CdS nanorod heterostructures

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Three-photon absorption in seeded CdSe/CdS nanorod heterostructures
นักวิจัย : Xing, Guichuan , Chakrabortty, Sabyasachi , Ngiam, Song Wee , Chan, Yinthai , Sum, Tze Chien
คำค้น : DRNTU::Engineering::Materials::Nanostructured materials.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : Xing, G., Chakrabortty, S., Ngiam, S. W., Chan, Y., & Sum, T. C. (2011). Three-Photon Absorption in Seeded CdSe/CdS Nanorod Heterostructures. The Journal of Physical Chemistry C, 115(36). , 1932-7447 , http://hdl.handle.net/10220/7072 , http://dx.doi.org/10.1021/jp205238q , 161429
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : The Journal of Physical Chemistry C
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Size dependent three-photon absorption (3PA) and three-photon-excited photoluminescence (PL) of CdSe/CdS nanorod heterostructures have been investigated using Z-scan and upconversion PL techniques with 150-fs laser pulses at 1300 nm. The PL from these rods show clear cubic power dependence and the 3PA cross-section (σ3) was found to be as high as 1.5×10^(-75) cm^6s^2photon^(-2) for 39 nm long rods, which is two to four orders of magnitude larger than those previously reported for spherical semiconductor nanocrystals (NCs) under ~100 fs laser pulse excitation. Importantly, by exploiting the unique property of the seeded nanorods to exhibit strong quantum confinement even at relatively large rod sizes, a superlinear dependence of the 3PA cross-section on nanoparticle volume was found and validated over a wide volume range. A simple derived relation that quantitatively describes σ3 and takes into account the laser pulse duration, is proposed; thereby providing a clear basis of comparison between the σ3 values of various II-VI semiconductor nanomaterials and facilitating a more judicious choice of their use in 3PA applications.

บรรณานุกรม :
Xing, Guichuan , Chakrabortty, Sabyasachi , Ngiam, Song Wee , Chan, Yinthai , Sum, Tze Chien . (2554). Three-photon absorption in seeded CdSe/CdS nanorod heterostructures.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Xing, Guichuan , Chakrabortty, Sabyasachi , Ngiam, Song Wee , Chan, Yinthai , Sum, Tze Chien . 2554. "Three-photon absorption in seeded CdSe/CdS nanorod heterostructures".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Xing, Guichuan , Chakrabortty, Sabyasachi , Ngiam, Song Wee , Chan, Yinthai , Sum, Tze Chien . "Three-photon absorption in seeded CdSe/CdS nanorod heterostructures."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Xing, Guichuan , Chakrabortty, Sabyasachi , Ngiam, Song Wee , Chan, Yinthai , Sum, Tze Chien . Three-photon absorption in seeded CdSe/CdS nanorod heterostructures. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.