The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
마이크로채널에 주입된 액적의 구동에 필요한 정전기력을 연구하여 액적의 이동에 따른 도파관 광스위치의 구동전압을 감소시키는 유도 원리를 얻었다. 우리는 문턱 전압과 액적 속도, 마이크로 채널의 표면 거칠기 사이의 관계를 분석적으로 계산하고, 실험 결과와 공기역학적 분석을 비교하여 확인되지 않은 일부 매개변수를 명확히 했습니다. 마이크로 채널 내 액적의 구동은 액적 양쪽 끝의 움직임을 고려한 Hagen-Poiseuille 유동 이론을 사용하여 가장 잘 분석되었습니다. 액적이 외력에 의해 구동되면 이동 시작 시 외력의 임계값이 발생하고 마이크로채널의 측벽에 대한 액적의 접촉각에서 히스테리시스가 발생합니다. 접촉각의 히스테리시스는 측벽의 거칠기로 인해 발생합니다. 실험에서 임계 전압 범위는 200~350V이고 스위칭 시간은 34~36ms입니다. 이러한 실험 결과로부터 액적의 속도는 0.3-0.4 mm/s로 평가되었습니다. 한편, 측정된 측벽 거칠기의 각도 분포는 30~110도 범위였으며, 문턱전압은 100~320V로 평가되어 실험결과와 좋은 일치를 보였다. 문턱전압의 감소는 마이크로채널의 측벽 거칠기를 평활화함으로써 실현될 수 있다. 수평 스폿 크기를 10μm까지 단축하면 광 스트림 스위치에 필요한 1.5ms의 스위칭 시간을 얻을 수 있습니다.
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부
Takuji IKEMOTO, Yasuo KOKUBUN, "Driving Voltage Analysis for Fast Response of Waveguide Optical Switch Based on Movement of Liquid Droplet Driven by Electrostatic Force" in IEICE TRANSACTIONS on Electronics,
vol. E91-C, no. 12, pp. 1923-1932, December 2008, doi: 10.1093/ietele/e91-c.12.1923.
Abstract: The electrostatic force required for the driving of liquid droplet injected in a microchannel was studied to obtain the guiding principle to reduce the driving voltage of waveguide optical switch based on the movement of droplet. We analytically calculated the relation between the threshold voltage and velocity of droplet and the surface roughness of microchannel, and clarified some unconfirmed parameters by comparing experimental results and aeromechanical analysis. The driving of droplet in a microchannel was best analyzed using the Hagen-Poiseuille flow theory, taking into account the movement of both ends of the droplet. When the droplet is driven by some external force, a threshold of the external force occurs in the starting of movement, and hysteresis occurs in the contact angle of the droplet to the side wall of the microchannel. The hysteresis of contact angle is caused by the roughness of side wall. In our experiment, the threshold voltage ranged from 200 to 350 V and the switching time from 34 to 36 ms. The velocity of droplet was evaluated to be 0.3-0.4 mm/s from these experimental results. On the other hand, the measured angle distribution of side wall roughness ranged from 30 to 110 degrees, and the threshold voltage was evaluated to be 100-320 V, showing a good agreement with experimental results. The reduction of threshold voltage can be realized by smoothing the side wall roughness of microchannel. The switching time of 10 ms, which is required for the optical stream switch, can be obtained by shortening the horizontal spot size down to 1.5 µm.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e91-c.12.1923/_p
부
@ARTICLE{e91-c_12_1923,
author={Takuji IKEMOTO, Yasuo KOKUBUN, },
journal={IEICE TRANSACTIONS on Electronics},
title={Driving Voltage Analysis for Fast Response of Waveguide Optical Switch Based on Movement of Liquid Droplet Driven by Electrostatic Force},
year={2008},
volume={E91-C},
number={12},
pages={1923-1932},
abstract={The electrostatic force required for the driving of liquid droplet injected in a microchannel was studied to obtain the guiding principle to reduce the driving voltage of waveguide optical switch based on the movement of droplet. We analytically calculated the relation between the threshold voltage and velocity of droplet and the surface roughness of microchannel, and clarified some unconfirmed parameters by comparing experimental results and aeromechanical analysis. The driving of droplet in a microchannel was best analyzed using the Hagen-Poiseuille flow theory, taking into account the movement of both ends of the droplet. When the droplet is driven by some external force, a threshold of the external force occurs in the starting of movement, and hysteresis occurs in the contact angle of the droplet to the side wall of the microchannel. The hysteresis of contact angle is caused by the roughness of side wall. In our experiment, the threshold voltage ranged from 200 to 350 V and the switching time from 34 to 36 ms. The velocity of droplet was evaluated to be 0.3-0.4 mm/s from these experimental results. On the other hand, the measured angle distribution of side wall roughness ranged from 30 to 110 degrees, and the threshold voltage was evaluated to be 100-320 V, showing a good agreement with experimental results. The reduction of threshold voltage can be realized by smoothing the side wall roughness of microchannel. The switching time of 10 ms, which is required for the optical stream switch, can be obtained by shortening the horizontal spot size down to 1.5 µm.},
keywords={},
doi={10.1093/ietele/e91-c.12.1923},
ISSN={1745-1353},
month={December},}
부
TY - JOUR
TI - Driving Voltage Analysis for Fast Response of Waveguide Optical Switch Based on Movement of Liquid Droplet Driven by Electrostatic Force
T2 - IEICE TRANSACTIONS on Electronics
SP - 1923
EP - 1932
AU - Takuji IKEMOTO
AU - Yasuo KOKUBUN
PY - 2008
DO - 10.1093/ietele/e91-c.12.1923
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E91-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2008
AB - The electrostatic force required for the driving of liquid droplet injected in a microchannel was studied to obtain the guiding principle to reduce the driving voltage of waveguide optical switch based on the movement of droplet. We analytically calculated the relation between the threshold voltage and velocity of droplet and the surface roughness of microchannel, and clarified some unconfirmed parameters by comparing experimental results and aeromechanical analysis. The driving of droplet in a microchannel was best analyzed using the Hagen-Poiseuille flow theory, taking into account the movement of both ends of the droplet. When the droplet is driven by some external force, a threshold of the external force occurs in the starting of movement, and hysteresis occurs in the contact angle of the droplet to the side wall of the microchannel. The hysteresis of contact angle is caused by the roughness of side wall. In our experiment, the threshold voltage ranged from 200 to 350 V and the switching time from 34 to 36 ms. The velocity of droplet was evaluated to be 0.3-0.4 mm/s from these experimental results. On the other hand, the measured angle distribution of side wall roughness ranged from 30 to 110 degrees, and the threshold voltage was evaluated to be 100-320 V, showing a good agreement with experimental results. The reduction of threshold voltage can be realized by smoothing the side wall roughness of microchannel. The switching time of 10 ms, which is required for the optical stream switch, can be obtained by shortening the horizontal spot size down to 1.5 µm.
ER -