Noise Reduction of a Mechanical Resonator by Laser Cooling

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  • レーザー冷却によるメカニカル振動子の低ノイズ化
  • レーザー レイキャク ニ ヨル メカニカル シンドウシ ノ テイノイズカ

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Abstract

<p>Several schemes to optically cool a micromechanical resonator are introduced. These schemes are classified into a cavity-assisted type and a cavity-free type, which both lead to damping of a micromechanical resonator with a laser light. The cavity-assisted schemes are based on the optomechanical coupling via the radiation pressure or bolometric effects, whereas the cavity-free scheme uses the optically excited carriers (electron-hole pairs) in a compound semiconductor. These laser cooling schemes allow us to reduce the thermal noise of a micromechanical resonator without using any refrigerant.</p>

Journal

  • Vacuum and Surface Science

    Vacuum and Surface Science 63 (10), 536-541, 2020-10-10

    The Japan Society of Vacuum and Surface Science

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