中国物理B ›› 2014, Vol. 23 ›› Issue (10): 107801-107801.doi: 10.1088/1674-1056/23/10/107801

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Temperature dependence of the photothermal laser cooling efficiency for a micro-cantilever

丁丽萍a b, 毛添华a b, 付号a, 曹更玉a   

  1. a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institution of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2014-04-04 修回日期:2014-05-30 出版日期:2014-10-15 发布日期:2014-10-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB922101).

Temperature dependence of the photothermal laser cooling efficiency for a micro-cantilever

Ding Li-Ping (丁丽萍)a b, Mao Tian-Hua (毛添华)a b, Fu Hao (付号)a, Cao Geng-Yu (曹更玉)a   

  1. a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institution of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-04-04 Revised:2014-05-30 Online:2014-10-15 Published:2014-10-15
  • Contact: Cao Geng-Yu E-mail:gycao@wipm.ac.cn
  • About author:78.20.nb; 42.60.-v; 42.55.Sa
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB922101).

摘要: The relationship between the photothermal cooling efficiency of a micro-cantilever's mechanical mode and the environmental temperature is studied. The micro-cantilever and a polished fiber end form a low finesse Fabry-Perot (FP) cavity. Experimental results in a temperature range from 77 K to 298 K show that temperature has an obvious influence on photothermal cooling efficiency. The photothermal cooling efficiency, η ph, at 100 K is 10 times that at 298 K. This accords well with the theoretical analysis that the high photothermal cooling efficiency can be achieved when photothermal response time, τph, and mechanical resonant frequency, ω0, are close to the optimal photothermal cooling condition ω0 τph=1. Our study provides an important approach for high effective photothermal cooling and high-sensitivity measurement for force microscopy.

关键词: micro-cantilever, FP cavity, photothermal cooling, temperature dependence, optomechanics

Abstract: The relationship between the photothermal cooling efficiency of a micro-cantilever's mechanical mode and the environmental temperature is studied. The micro-cantilever and a polished fiber end form a low finesse Fabry-Perot (FP) cavity. Experimental results in a temperature range from 77 K to 298 K show that temperature has an obvious influence on photothermal cooling efficiency. The photothermal cooling efficiency, η ph, at 100 K is 10 times that at 298 K. This accords well with the theoretical analysis that the high photothermal cooling efficiency can be achieved when photothermal response time, τph, and mechanical resonant frequency, ω0, are close to the optimal photothermal cooling condition ω0 τph=1. Our study provides an important approach for high effective photothermal cooling and high-sensitivity measurement for force microscopy.

Key words: micro-cantilever, FP cavity, photothermal cooling, temperature dependence, optomechanics

中图分类号:  (Photothermal effects)

  • 78.20.nb
42.60.-v (Laser optical systems: design and operation) 42.55.Sa (Microcavity and microdisk lasers)