光ピンセット技術 - ritsumei.ac.jp

1 36 .. i cos 1. r cos 1 i cos 1. t cos 2 ( n2/n1 ) i cos 2.. Mr . ( icos 1 R i cos 1 ) tcos 2. i { ( + ) cos 1- ( n2/n1 ) cos 2}.. Mi . Mt F { ( + ) cos 1- ( n2/n1 ) cos 2}(n1 /c ).. b F at a b F at a f f F. F. F F F a . a b F. b F ao F ao (a) (b).. VTR. YAG . CCD = m .. /4 . ND .. 4 1 .. CCD . CW Nd YAG .. Inlet Cover glass Liquid Slide glass Spacer Objective lens .. 4. ( T = 10 m). ( ). 3 ( T = 10 m). ( ). 2. 1. 0. 0 2 4 6 8. [ m].. 1. (1980). 2. (1987). 3. (1989). 4. (1992) . 5. (1992). 6. (1994). 7. (1994). 8. (1995). 9. (1995). 10. (1997). 11. (1999) .. ATP : ,1999 .. DM.. He-Ne .. DM. YAG PBS DM. SIT . DM. APD. 4D-PD.. 1.. 2. (1986). 3. (1992). 4. (1992).. 5. (1994). 6. (1995). 7. (1997).

2 8. (1999). 9. (2000). 10. (2001).. -2- 30.. m . po w e r . 20 do w n . po w e r up 10 .. 110 m . 90 m 70 m 0. -40 -20 0 20 40 ( 10 m). m .. Clad 24 m Grating 6 m Core Clad 20 m 1mm Si substrate .. {.. Fgrad 1. = n1 grad E. 4. ( ). 2.. E . 40 Lateral Axial 30. Trapping force F (pN). 20. 10. 0. -1000 -500 0 500 1000. Distance from focus (nm). SNOM .. XYZ .. PMT. YAG . Conditions to observe a refractive index gratins by an optically trapped gold particle Gold particle diameter 100nm Medium Water YAG laser intensity 25 mW ( =1064nm). Ar+ laser intensity 130 W ( =488nm). Scan velocity m/s Scan pitch 50 nm Scan area 5 5 m2. Measurement time 5 Minutes Clad 24 m Grating 6 m Core Clad 20 m 1mm Si substrate Core width (6 m ).}

3 1st order grating ( m pitch). Zero order grating . ( m pitch) . m m pitch (a) (b) .. Conditions to fabricate refractive index gratings in PLC. Core SiO2+GeO2 index Clad (SiO2) index Refractive index difference Estimate . Source: ArF laser =193nm . Phase mask pitch: m Phase mask method Energy density per pulse: Pulse repetition rate: 50Hz Grating pitch (Zero order): m l p-po ol p-p 5. 5 m 5 m 5. m m 0 0. p-pol s-pol Zero order gratings 1st order gratings 0 1000 2000 3000 4000. Scan distance (nm). m 200nm l ol p-po Without probe p-p Without probe 5. 5 m With probe With probe 5. 5 m 0 m m 0.. 200nm 600nm m .. Objective Laser Optical mixer Detector Sample Outlet Reagent Analysis Mixing Inlet Fluidic channel.

4 Laser r . Optical pressure rR. I. Optical pressure F. Ray trace II. III. d/2. Rotation w Fsin .. F. Optical pressure . r, , rR, . w rR =. cos . T = rR F sin . 2w = cos 1. rL min Tr drd . rL max M = 4 =0. d rL min = 0 rL max = tan{arcsin( NA / n1 )}. min max .. Beam profile: 40. Donut Uniform Torque [pN m]. 30. Gaussian 20. 10. 0. 0 20 40 60 80 100.. 120. Power [mW].. , avier tokes .. 2 3.. 3 .. u . (U u) = 0. Navier-Stokes . U. + ((U u ) ) U = P + 2U. t . U . P . n . (50rpm 2 ).. 40 m 40 m 30.. 30 20 .. 10 . 20. 0. Z. 10 Y X. xz . 0. Z X. Y. xy . 100rpm 200rpm |w| [m/s]. |u| [m/s]. 100rpm 200rpm 0 0. -30 -20 -10 0 10 20 30. [ m] -30 -20 -10 0 10 20 30. [ m]. |u| |v| ( ) |w| ( ).. 5 m.

5 0 10 20 30 40 50 60 10 20 30 40 50 60. 30 30. 20 20. 10 10. 0 0. -10 -10. -20 -20. -30 -30.. Si Al .. Al .. 10 20 30 m OMR-83, US-8. 2000~3500rpm 85 20 . 1 4 . 1 2 . 30 20 10 .. (PC).. 30 m . 25 /s . 2 . Vertical illumination Oscillograph Oblique Ge PD illumination Objective Sample lens High speed Lens camera YAG laser Single mode fiber .. 16 50 rpm 52. 14 54. Flux amount[ m/s] 60. 12. 10. 8. 6. 4. 2. 0. -8 -6 -4 -2 0 2 4 6 8. Distance [ m].. ( .. 180 rpm 20 m 12 m . +10 . + mm Bottom surface from bottom surface - m - 15 m Glass Gold . 12. 10 . 8 . / . 6. 4. 2. 0. -5 0 5 10 15 20 25.. 280 rpm 20 m 9 m . focal point - m - 8 m -12 m 25.. 20. /s .. 15. 10. 5. 0. 0 5 10.. COMPAQXP1000(500 MHz) 1 /1.)

6 CFX-4 (AEA. ).. AVS/Express VIZ (KGT ).. Power Mac B3.. Premiere (Adobe ).