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Laser cooling of a semiconductor by 40 kelvin: an optical refrigerator based on cadmium sulfide nanoribbions

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Laser cooling of a semiconductor by 40 kelvin: an optical refrigerator based on cadmium sulfide nanoribbions
นักวิจัย : Zhang, Jun , Li, Dehui , Chen, Renjie , Xiong, Qihua
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : Zhang, J., Li, D., Chen, R., & Xiong, Q. (2013). Laser cooling of a semiconductor by 40 kelvin: an optical refrigerator based on cadmium sulfide nanoribbions. Proceeding of SPIE 8638, Laser Refrigeration of Solids VI, 863808. , http://hdl.handle.net/10220/13357 , http://dx.doi.org/10.1117/12.2002713
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : -
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

We have demonstrated the first net laser cooling of semiconductors using CdS nanoribbons (or nanobelts) in this work. This net cooling effect is found to be facilitated by resonant high order annihilation of longitudinal optical (LO) phonons due to a strong exciton-LO phonon Fröhlich interactions. Using a pumpprobe luminescence thermometry technique to measure the local temperature change, we have achieved as large as 40 K cooling temperature from room temperature pumped by a 514 nm laser while a 532 nm laser pumping led to a cooling of 20 K. At 100 K, only the 532 nm laser pumping can lead to a net cooling of around 15 K. Our work opens new directions to search laser cooling semiconductors and makes it feasible to achieve all solid-state cryocoolers based on semiconductors.

บรรณานุกรม :
Zhang, Jun , Li, Dehui , Chen, Renjie , Xiong, Qihua . (2556). Laser cooling of a semiconductor by 40 kelvin: an optical refrigerator based on cadmium sulfide nanoribbions.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Jun , Li, Dehui , Chen, Renjie , Xiong, Qihua . 2556. "Laser cooling of a semiconductor by 40 kelvin: an optical refrigerator based on cadmium sulfide nanoribbions".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Jun , Li, Dehui , Chen, Renjie , Xiong, Qihua . "Laser cooling of a semiconductor by 40 kelvin: an optical refrigerator based on cadmium sulfide nanoribbions."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Zhang, Jun , Li, Dehui , Chen, Renjie , Xiong, Qihua . Laser cooling of a semiconductor by 40 kelvin: an optical refrigerator based on cadmium sulfide nanoribbions. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.