• CDE review
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• v.14 no.1
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• pp.41-47
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• 2008

• Proceedings of the Optical Society of Korea Conference
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• 2009.10a
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• pp.56-57
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• 2009

• Proceedings of the Optical Society of Korea Conference
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• 2009.02a
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• pp.415-416
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• 2009

• Electrical & Electronic Materials
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• v.37 no.1
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• pp.18-28
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• 2024

• Proceedings of the Optical Society of Korea Conference
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• 2003.02a
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• pp.16-17
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• 2003

수 십 ∼ 수 마이크로 크기의 미세 입자에 강하게 집속된 빔을 산란시키게 되면 입자들은 운동량의 변화에 따라 광의 초점부근에서 포획되는 힘을 받게 된다. 이런 힘은 scattering force와 gradient force로 구분할 수 있고, Optical tweezers는 광의 gradient force를 이용하여 미세입자를 포획하고 조작하는 기술이다. 광에 의해 물리적인 접촉 없이 입자를 포획할 수 있다는 사실로부터 optical tweezers는 생물학을 비롯한 많은 분야에서 유용한 도구로 사용되어지고 있다. (중략)

• Proceedings of the Optical Society of Korea Conference
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• 2008.02a
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• pp.237-238
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• 2008

• Proceedings of the Optical Society of Korea Conference
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• 2000.02a
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• pp.228-229
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• 2000

1970년 Ashkin이 레이저 광압을 이용하여 수 마이크로미터 크기(micrometer sized)의 유전체를 광속의 진행 방향으로 가속시킴과 동시에 광속축(beam axis)방향으로 입자를 끌어당기는데 성공함으로써 레이저를 이용한 미세구(micro-particle) 의 포획 및 조작에 대한 연구와 실험이 시작되었다$^{[1]}$ . 이후에 많은 사람들에 의해 연구가 활발히 이루어졌으며$^{[2]~[7]}$ , 이러한 레이저를 이용한 미세구의 포획방법은 광집게(optical tweezer)로써 생물학과 물리학 분야에서의 높은 가능성 때문에 지금도 연구가 계속되고 있다. (중략)

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.10a
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• pp.501-502
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• 2006

• Korean Journal of Optics and Photonics
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• v.19 no.2
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• pp.132-139
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• 2008

In scanning laser optical tweezers, high speed scanning stages are used to manipulate a laser beam spot. Due to the inertia of the stage, the output scanning signal decreases with increased frequency of the input signal. This discrepancy in the signals is difficult to observe since most of the energy from the laser beam is blocked out to avoid CCD damage. In this paper, we propose two methods to alleviate these problems. Firstly, frequency responses of piezo stages are measured to analyze the signal drops and the input signal is compensated accordingly. Secondly, an overlay of the scanning path is drawn on the live monitoring screen to enhance the visibility of the scanning path. The result is a drop-compensated scanning with clear path view.

• Proceedings of the Optical Society of Korea Conference
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• 2009.02a
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• pp.387-388
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• 2009

Biophotonics is an emerging area in a fusion of biology and photonics, especially in advanced bioimaging, optical biosensors, photomodulation, and biochip optical read-out, and optical manipulation. This emerging area also creates many opportunities for interdisciplinary study of biology and photonics. Micro-Electro-Mechanical-System(MEMS) is an attractive technology in miniaturizing sensors and actuactors. For last decade, it has contributed to the development for active and passive small and integrated optical components in optical communication. Recently, this technology is also merging into biology for high sensitive biosensing and high resolution and fast bioimaging in small form factor. In this talk, some key advantages of small optical components and recent biophotonic MEMS achievement will be discussed for miniaturized advanced biophotonic systems.