Phone:
886-2-27898000 ext 17 (Office) or 52, 53, 54 (Lab)
Fax: 886-2-27826680
Address:
Research Center for Applied Sciences,
Academia Sinica
128 Sec. 2, Academia Rd., Nankang, Taipei 11529, Taiwan
台北市11529南港區研究院路二段128號
E-mail: pkwei@gate.sinica.edu.tw
我們實驗室近年的研究主要集中在奈米結構/顆粒的製造技術、發展奈米光學顯微科技、瞭解光波在奈米結構的光學特性以及這些奈米結構/顆粒在生物與光電子元件上的應用。
主要研究題目：
[1]奈米電漿子之特性與量測：
在理論上利用時域有限差分法模擬光波在奈米金屬夾縫間的現象，在實驗上利用近場光學顯微術量測光在奈米金屬洞與夾縫在特定波長的異常穿透現象。在奈米夾縫部分，確認此異常穿透現象為TM偏振光在夾縫內的gap plasmons共振所造成。在週期性奈米夾縫上所出現的非發散聚焦束部分，確認為TM偏振光在出口金屬表面的表面電漿共振所造成。
References:
Pei-Kuen Wei,* Hsieh-Li Chou and WunShain Fann, “Optical near-field in nano metallic slits”, Optics Express, 10, p. 1418 (2002) (*corresponding author)
Pei-Kuen Wei,* Yu-Chieh Huang, Ching-Chang Chieng, Fan-Gang Tseng and Wunshain Fann “Off-angle illumination induced surface plasmon coupling in subwavelength metallic slits” Optics Express, Vol. 13, No. 26, p.10784 (2005) (*corresponding author)。
Pei-Kuen Wei, Hsieh-Li Chou, You-Ren Cheng, Cheng-Hung Wei, WunShain Fann , Jonas Tegenfeldt,“ Beaming Effect of Optical Near-Field in Micrometer Separated Nano Metallic Slits”, Opt. Comm. 253 (2005) 198-204 (*corresponding author)
[2] 奈米電漿子在生醫感測之應用：
無論在金屬奈米夾縫間的gap plasmons或在出口金屬表面的表面電漿子波，其共振效應會形成一異常穿透光譜，此異常穿透光對環境非常敏感，我們應用它們發展成一靈敏的生醫或化學感測元件。
References:
Kuang-Li Lee, Chia-Wei Lee, and Pei-Kuen Wei*,”Sensitive Detection of Nanoparticles using Metallic Nanoslit Arrays”, App. Phys. Lett. 90, 233119 (2007)
Kun-Li Lee, Way-Seen Wang and Pei-Kuen Wei*,” Sensitive Biosensor Array by Using Surface Plasmon Resonance on Metallic NanoSlits”, J. Biomedical Optics, 2007 12(4) 044023 (July/August 2007)
Yu-Jen Chang, Yi-Chun Chen, Hui-Ling Kuo and Pei-Kuen Wei, “Nano Fiber-Optic Sensor based on the Excitation of Surface Plasmon Wave Near Fiber Tip”, J. Biomedical Optics, 2006, Vol. 11, 014032
F.-C. Chien , C.-Y. Lin, J.-N. Yih, K.-L. Lee, C.-W. Chang, P.-K. Wei, C.-C. Sun and S.-J. Chen,” Coupled waveguide-surface plasmon resonance biosensor with subwavelength grating”, Biosensors and Bioelectronics,22 (2007)
[3]奈米結構的光罩製程科技：
次波長透明結構上會有相當程度的邊緣繞射，此邊緣繞射光會在結構體上造成一種次波長的光束聚焦效應，應用在光罩顯影技術上可大量製作次波長結構。此技術不僅適用在大量製造光子晶體結構，連重要的夾疵(defect)結構也可以同時被製造出來。目前此技術的解析度約為λ/5，以400nm 紫光而言可約達80nm 的空間解析度，非常適用操作在可見光至近紅外光波段光子晶體結構之大量製造。
References:
Pei-Kuen Wei, Hsieh-Li Chou, Yi-Chun Chen, ”Subwavelength Focusing Effect in the Near-Field of Mesoscale Air-Dielectric Structures” Optics Letters, 29, p.433 (2004) (*corresponding author)
Wei-Lun Chang, Yu-Jen Chan, Pei Hsi Tsao, and Pei-Kuen Wei,* ”Fabricating Subwavelength Array Structures Using a Near-field Photolithographic Method” App. Phys. Lett. 88,10110 (2006) (*corresponding author)
Wei-Lun Chang, Shieh-Li Chou, You-Ren Chang and Pei-Kuen Wei,* “Fabrication of photonic bandgap structures with designed defects by edge diffraction lithography” Nanotechnology 17 ,2006, 1333-1338(*corresponding author)
Wei-Lun Chang, Pei-Hsi Tsao and Pei-Kuen Wei, “Sub-100nm Photolithography by Using TE-Polarized Waves in Transparent Nano Structures” Optics Letters, 32, 71-73 (2007) (*corresponding author)
[4]奈米光學量測科技：
發展偏光調變近場光學顯微術，研究材料在數十奈米尺度下的特性如發光材料之結晶性、發光特性與表面型態之關係。此技術可同時量測薄膜小於100 奈米的結晶化程度、結晶方向與表面起伏等資訊。
References:
T. Y. Lin, P. K. Wei, E. H. Lin, T. L. Tseng and R. Chang, “Investigation on the Correlation Between the Crystalline and Optical Properties of InGaN Using Near-Field Scanning Optical Microscopy”, Electrochemical and Solid-State Letters, 10,217-219 (2007)
Pei-Kuen Wei, Hsieh-Li Chou, You-Ren Cheng and Yung-Der Yao, ”Near-Field Magneto-Optical Microscopy Using the Surface Plasmon Wave and the Transverse Magneto-Optical Kerr Effect”, J. Appl. Phys. 98, 093904 (2005) (*corresponding author) (IF=2.316)
Hsieh-Li Chou, Shen-Yi Hsu and Pei-Kuen Wei,” Light Emission in Phase Separated Conjugated and Non-Conjugated Polymer Blends”, Polymer, 46, (2005), 4967-4970 (*corresponding author)
Jiann-Jong Chiu, Way-Seen Wang, Chi-Chung Kei, Chun-Pey Cho, and Tsong P. Perng, Sheng-Yu Chiu and Pei-Kuen Wei,” Room temperature vibrational photoluminescence and field emission of nanoscaled tris-(8-hydroxyquinoline) aluminum crystalline film”, Appl. Phys. Lett. 83, 4607 (2004)
[5]微型陣列晶片檢測科技：
發展出一種新的光學偵測系統可以高通量與靈敏的檢測微型陣列生醫晶片。這個系統使用平面光學消逝波為激發源，可以有很低的背景雜訊、大且均勻的檢測面積。此系統不需在生醫晶片上做任何改變，一般在玻璃基材上的微型陣列皆可由此系統檢測，此技術之台灣專利(TW200630653)。
TW patent (26A-930728) “平面光學消逝波微型陣列讀取系統” Pei-Kuen Wei (2006,10~2025, 11)
Pei-Kuen Wei, “Method and system for reading microarrays”, Publication Application No. US20060186346
News and Awards:
(1) 我們發展一套利用差分近場光學顯微技術的方法，可以由近場量到光場及其一次與二次微分光場，利用這些量測光場可以直接重建光學波導的折射率分佈。此方法比起之前的技術具有更好折射率重建效果，在2007年10月號的Photonics Spectrum Magazine對我們發展的技術加以介紹。
Wan-Shao Tsai, Way-Seen Wang and Pei-Kuen Wei*,”Two-Dimensional Refractive Index Profiling by Using Differential Near-Field Scanning Optical Microscopy”, Appl. Phys. Lett. 91, 061123 (2007)
(2) 我們發展一種奈米製造技術，可以大面積製造次微米的玻璃透鏡陣列。此陣列大小為透鏡陣列的極限，我們研究它的聚焦效果，發現此次微米玻璃透鏡陣列具有良好的次波長聚焦特性，且在空間上可以形成三維的光場分佈，配合光罩蝕刻技術可以製造三維次微米結構。中央研究院選為2007年重要成果之一，以刊物加以介紹。
Wei-Lun Chang and Pei-Kuen Wei,* “Fabrication of a close-packed hemispherical submicron lens array and its application in photolithography”, Optical Express, Vol. 15, Issue 11, pp. 6774-6783, 2007 (*corresponding author)
(3) 我們發展一種新的奈米製造技術，利用次波長透明結構體的邊緣聚焦特性製造光子晶體結構及其defect pattern，此方法具有高的聚焦深寬比，同時產生週期性的光晶結構與重要的defect圖案。此技術適合應用在光罩製程技術上，直接大量製造光子晶體結構。此成果被中央研究院選為2006年成果之一。
Wei-Lun Chang, Shieh-Li Chou, You-Ren Chang and Pei-Kuen Wei*, “Fabrication of photonic bandgap structures with designed defects by edge diffraction lithography” Nanotechnology 17 ,2006, 1333-1338(*corresponding author)
(4) 我們研究光波在奈米金屬夾縫間的的現象，首先在理論上利用時域有限差分法模擬與近場光學量測上發現不同偏振光出現截然不同的光場分布與光穿透率，顯示此差異來自gap plasmon的出現。此結果受到國外光學雜誌的重視，在2003 年二月號的”Photonics Spectra magazine”中，簡介我們的成果。
Pei-Kuen Wei,* Hsieh-Li Chou and WunShain Fann, “Optical near-field in nano metallic slits”, Optics Express, 10, p. 1418 (2002) (*corresponding author)
(5) Wei-Lun Chang, 2005 Optics and Photonics in Taiwan, Student's Paper Award (Paper Title: Fabricating Subwavelength Array Structures Using a Near-field Photolithographic Method).
(6) Kuang-Li Lee, 2007 Optics and Photonics in Taiwan, Student's Best Post Award (Paper Title: Comparisons of Surface Plasmon Sensitivity in Metallic Nanostructures).
Publication List: (2001-2007)
1. Wan-Shao Tsai, Way-Seen Wang and Pei-Kuen Wei*,”Two-Dimensional Refractive Index Profiling by Using Differential Near-Field Scanning Optical Microscopy”,. Appl. Phys. Lett. 91, 061123 (2007)
2. Kuang-Li Lee, Chia-Wei Lee, and Pei-Kuen Wei*,”Sensitive Detection of Nanoparticles using Metallic Nanoslit Arrays”, App. Phys. Lett. 90, 233119 (2007) (*corresponding author)
3. Kun-Li Lee, Way-Seen Wang and Pei-Kuen Wei*,” Sensitive Biosensor Array by Using Surface Plasmon Resonance on Metallic NanoSlits”, J. Biomedical Optics, 12(4), 044023 (2007) (*corresponding author)
4. Wei-Lun Chang and Pei-Kuen Wei, “Fabrication of a close-packed hemispherical submicron lens array and its application in photolithography”, Optical Express, Vol. 15, Issue 11, pp. 6774-6783, 2007 (*corresponding author)
5. T. Y. Lin, P. K. Wei, E. H. Lin, T. L. Tseng and R. Chang, “Investigation on the Correlation Between the Crystalline and Optical Properties of InGaN Using Near-Field Scanning Optical Microscopy”, Electrochemical and Solid-State Letters, 10,217-219 (2007)
6. Chi-Cheng Fu, Hsu-Yang Lee, Kowa Chen, Tsong-Shin Lim, Hsiao-Yun Wu, Po-Keng Lin, Pei-Kuen Wei, Pei-Hsi Tsao, Huan-Cheng Chang, and Wunshain Fann, “Characterization and applications of single fluorescent nanodiamonds as cellular biomarkers” PNAS, 104: 727-732 (2007)
7. Po-Keng Lin, Chi-Cheng Fu, Y.-L. Chen, Yan-Ru Chen, Pei-Kuen Wei, C. H. Kuan, and W. S. Fann,“ Static conformation and dynamics of single DNA molecules confined in nanoslits“ Phy. Rev. E, 75 (2007)
8. F.-C. Chien , C.-Y. Lin, J.-N. Yih, K.-L. Lee, C.-W. Chang, P.-K. Wei, C.-C. Sun and S.-J. Chen,” Coupled waveguide-surface plasmon resonance biosensor with subwavelength grating”, Biosensors and Bioelectronics,22 (2007) 2737-2742
9. Wei-Lun Chang, Pei-Hsi Tsao and Pei-Kuen Wei, “Sub-100nm Photolithography by Using TE-Polarized Waves in Transparent Nano Structures” Optics Letters, 32, 71-73 (2007) (*corresponding author)
10. Wei-Lun Chang, Yu-Jen Chan, Pei Hsi Tsao, and Pei-Kuen Wei,* ”Fabricating Subwavelength Array Structures Using a Near-field Photolithographic Method” App. Phys. Lett. 88,10110 (2006) (*corresponding author)
11. Wei-Lun Chang, Shieh-Li Chou, You-Ren Chang and Pei-Kuen Wei, “Fabrication of photonic bandgap structures with designed defects by edge diffraction lithography” Nanotechnology 17 ,2006, 1333-1338(*corresponding author)
12. Yu-Jen Chang, Yi-Chun Chen, Hui-Ling Kuo and Pei-Kuen Wei, “Nano Fiber-Optic Sensor based on the Excitation of Surface Plasmon Wave Near Fiber Tip”, J. Biomedical Optics, 2006, Vol. 11, 014032 (*corresponding author)
13. J.-N. Yih, Y.-M. Chu, Y.-C. Mao, W.-H. Wang, F.-C. Chien, K.-L. Lee, P.-K. Wei, and S.-J. Chen*, “Optical waveguide biosensors constructed with sub-wavelength gratings,” Applied Optics, 2006. Vol. 45, Issue 9, pp. 1938-1942
14. C.W. Lee, K.T. Huang, P.K. Wei and Y.D. Yao” Conjugation of γ-Fe2O3 nanoparticles with single strand oligonucleotides “ Journal of Magnetism and Magnetic Materials, 3 March 2006,
15. Pei-Kuen Wei*, Yu-Jen Chang, Chia-Wei Lee, “Sensitive plasmonic biosensor using gold nanoparticles on a nano fiber tip” Proc. SPIE Vol. 6099, p. 86-94, 2006 (*corresponding author)
16. Pei-Kuen Wei, Yu-Chieh Huang, Ching-Chang Chieng, Fan-Gang Tseng and Wunshain Fann “Off-angle illumination induced surface plasmon coupling in subwavelength metallic slits” Optics Express, Vol. 13, No. 26, p.10784 (2005) (*corresponding author)
17. Pei-Kuen Wei, Hsieh-Li Chou, You-Ren Cheng and Yung-Der Yao, ”Near-Field Magneto-Optical Microscopy Using the Surface Plasmon Wave and the Transverse Magneto-Optical Kerr Effect”, J. Appl. Phys. 98, 093904 (2005) (*corresponding author))
18. Hsieh-Li Chou, Shen-Yi Hsu and Pei-Kuen Wei,” Light Emission in Phase Separated Conjugated and Non-Conjugated Polymer Blends”, Polymer, 46, (2005), 4967-4970 (*corresponding author)
19. Pei-Kuen Wei, Hsieh-Li Chou, You-Ren Cheng, Cheng-Hung Wei, WunShain Fann , Jonas Tegenfeldt,“ Beaming Effect of Optical Near-Field in Micrometer Separated Nano Metallic Slits”, Opt. Comm. 253 (2005) 198-204 (*corresponding author)
20. Pei-Kuen Wei, Hsieh-Li Chou, Yi-Chun Chen, ”Subwavelength Focusing Effect in the Near-Field of Mesoscale Air-Dielectric Structures” Optics Letters, 29, p.433 (2004) (*corresponding author)
21. Hsieh-Li Chou, Yi-Chun Chen and Pei-Kuen Wei, ”Topography Induced Polarization Anisotropy in Mesoscale Structures” Scanning 26, 39-42 (2004) (*corresponding author) )
22. Cheng Hung Wei, Pei Hsi Tsao, Wunshain Fann, Pei-Kuen Wei, Jonas O. Tegenfeldt, Robert H. Austin,” Polarization dependence of light intensity distribution near a nanometric aluminum slit ” JOSA B, 21, p. 1005 (2004)
23. Wang, T.-J. Huang, C.-F. Wang, W.-S. and Wei, P.-K. “A Novel Wet-Etching Method Using Electric-Field-Assisted Proton Exchange in LiNbO3”, IEEE, J. of Lightwave Tech., 22, 1764-1771 (2004)
24. Jiann-Jong Chiu, Way-Seen Wang, Chi-Chung Kei, Chun-Pey Cho, and Tsong P. Perng, Sheng-Yu Chiu and Pei-Kuen Wei,” Room temperature vibrational photoluminescence and field emission of nanoscaled tris-(8-hydroxyquinoline) aluminum crystalline film”, Appl. Phys. Lett. 83, 4607 (2004)
25. Pei-Kuen Wei, Yi-Chun Chen and Hsieh-Li Chou, “The Diffraction Induced Near-Field Optical Images in Mesoscale Air-Dielectric Structures”, JOSA B, 20, p.1503 (2003) (*corresponding author)
26. Pei-Kuen Wei, Yi-Chun Chen and Hui-Ling Kuo, ”Systematic Variation of Polymer Jacket Fibers and the Effects on Tip Etching Dynamics”, J. of Microscopy, 210, Pt3, p. 334 (2003) (*corresponding author)
27. SHAPE \* MERGEFORMAT Pei-Kuen Wei, Sheng-Yu Chiu and Wei-Lun Chang, ”Determination of Mesoscale Crystallization by Collection-Mode Polarization Modulated Near-Field Optical Microcopy”, Review of Scientific Instrument, 73, No 7, p. 2624 (2002)
28. Pei-Kuen Wei,* Hsieh-Li Chou and WunShain Fann, “Optical near-field in nano metallic slits”, Optics Express, 10, p. 1418 (2002) (*corresponding author)
29. C. H. Tan, Anto Regis Inigo, W. S. Fann, P. K. Wei, G. Y. Perng and S. A. Chen, ”The Morphological Dependence of Charge Transport in a Soluble Luminescent Conjugated Polymer”, Organic Electronics 3, 81 (2002)
30. Y. Z. Lee, X. Chen, S. A. Chen, P. K. Wei, and W. S. Fann, “Soluble Electroluminescent Poly(Phenylene vinylene)s with Balanced Electron- and Hole Injections”, J. Am. Chem. Soc., 123, p. 2296 (2001) (SCI)
31. P. K. Wei, Y. F. Lin , W. S. Fann, Y. Z. Lee and S. A Chen ,”Polarization Anisotropy in Mesoscale Domains of Poly(Phenylene Vinylene) Thin Films “, Physical Review B, 63, p. 045417, (2001) (SCI)
32. P. K. Wei, and W. S. Fann, ” The correlation between polarization modulated near field optical images and probe’s anisotropy ”, J. of Microscopy, 201, p.1 (2001) (SCI)
33. C. H. Tan, Anto Regis Inigo, J. H. Hsu, W. S. Fann and P. K. Wei, ”Mesoscale Structures in Luminescent Conjugated Polymer thin film studied by near-field scanning optical microscopy”, J. phys. and Chem. of Solids, 62 (2001) 1643 (SCI)
Patents:
1. TW patent (26A-930728) “平面光學消逝波微型陣列讀取系統” Pei-Kuen Wei (2006,10~2025, 11)
2. Pei-Kuen Wei, “Method and system for reading microarrays”, Publication Application No. US20060186346
3. TW patent ”奈米光纖探測器”, Pei-Kuen Wei and Yi-Chun Chen, TW1246995, Jan. 11, 2006
4. US patent “ Etching method for fabricating high quality optical fiber probe”, Pei-Kuen Wei and Yi-Chun Chen, US 6,905,627B2, Jun. 14, 2005
5. US patent “Large Area Scanning Tip System For Near Field Microscope ”。Pei-Kuen Wei and Wun-shain Fann. Period: 2001,8~ 2018,12，No. US 6,271,513B1。
6. Taiwan patent： “可進行大面積掃瞄之剪力回饋架構、利用此架構形成之近場光學顯微鏡”。發明人：魏培坤，范文祥。專利權人：行政院國家科學委員會, period：2000,7~ 2018,9，No：117513。