1. Applications of Photonic Crystals on Sensing Presentation for the lecture Photonic Crystals Zhaolu Diao 24.06.2009 Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics

2. Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 1 Photonic Crystals Intergrated Optics devices PC QCL Super lensing Slow light Sensing …… CCW

3. The principle of sensing Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 2

4. Key points for sensing Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 3 Cavity Light-sample overlapQ factor Low Q High Q

5. Advantages of PCs for sensing Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 4

6. Photonic crystal microcavity based sensor Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 5 (a)before capture (b) after capture Capability of detecting 1 fg of mater a = 400 nm d = 240 nm d center = 685 nm M. R. Lee et al., Opt. Lett. 32, 2007

7. Photonic crystal microcavity based sensor Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 6 ExEx EyEy HzHz M. R. Lee et al., Opt. Lett. 32, 2007

8. Photonic crystal waveguide based sensor Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 7 A.Di Falco et al., APL 94, 2009 a = 490 nm h = 220 nm r = 0.3 a w = 0.3a w = 0.1a, 0.2a, 0.3a, 0.4a n = 1.34 w = 0.4a S = Δλ/Δn = 585 nm/RIU n = 1.0 red line and yellow shade n = 1.315 black line and gray shade

9. Photonic crystal waveguide based sensor Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 8 A.Di Falco et al., APL 94, 2009 Slot width (a) 171 nm (b) 166 nm (c) 152 nm S = Δλ/Δn = 1538 nm/RIU a = 490 nm h = 220 nm r = 0.3 a w = 0.3a n = 1.0 red line and yellow shade n = 1.315 black line and grey shade

10. Photonic crystal band edge laser sensor Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 9 S. Kim et al., APL 94, 2009 a = 400 nm and 450 nm, r = 160 nm Five InGaAsP QWs on InP substrate Strong photoluminescence at around 1540 nm

11. Photonic crystal resonator array sensor Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 10 S. Mandal et al., Opt. Express 16, 2008

12. Photonic crystal resonator array sensor Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 11 S. Mandal et al., Opt. Express 16, 2008

13. Comparison Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 12 PC microcavity: High mass sensitivity PC waveguide: High Q ( high sensitive limit) High light mater overlap PC BEL: Compact setup PC resonators array: Multiplex detection

14. Towards improvement Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 13 Precisely transport specimen to the detecting area Engineering of structures to achieve high Q modes Integration of different structures or technical methods Hand devices with low sample volume and total mass Capability to detect multi-type molecules during one measurement …….

15. My proposal Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 14 A B C E F G X = B(CH 2 ) n E X = ? PC Sensoracceptoranalyte

16. Summary Laboratory of Quantum Optoelectronics Zhaolu DiaoDoctoral Program in Photonics 15 Principle of bio-sensing Why photonic crystals? Examples of photonic crytal based sensors Comparison Summary and outlook