Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors
In this paper, we introduce a novel sensor scheme which merges nano-photonics and nano-fluidics on a single platform through the use of free-standing photonic crystals (PhCs). PhCs offer great freedom to manipulate the spatial extent and the spectral characteristics of the electromagnetic fields. Al...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | en_US |
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SPIE
2011
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| Online Access: | http://hdl.handle.net/1721.1/64455 |
| _version_ | 1826216649118711808 |
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| author | Huang, Min Yanik, Ahmet Ali Chang, Tsung-Yao Altug, Hatice |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Huang, Min Yanik, Ahmet Ali Chang, Tsung-Yao Altug, Hatice |
| author_sort | Huang, Min |
| collection | MIT |
| description | In this paper, we introduce a novel sensor scheme which merges nano-photonics and nano-fluidics on a single platform through the use of free-standing photonic crystals (PhCs). PhCs offer great freedom to manipulate the spatial extent and the spectral characteristics of the electromagnetic fields. Also, nanoholes in PhCs provide a natural platform to transport solutions. By harnessing these nano-scale openings, we theoretically and experimentally demonstrate that both fluidics and light can be manipulated at sub-wavelength scales. In this scheme, the free standing PhCs are sealed in a chamber such that only the nano-scale hole arrays enable the flow between the top and the bottom channels. The nanohole arrays are used as sensing structures as well as nanofluidic channels. Compared to the conventional fluidic channels, we can actively steer the convective flow through the nanohole openings for effective delivery of the analytes to the sensor surface. This scheme also helps to overcome the surface tension of highly viscous solution and guarantees that the sensor can be totally immersed in solution. We apply this method to detect refractive index changes in aqueous solutions. Bulk measurements indicate that active delivery of the convective flow results in better performance. The sensitivity of the sensor reaches 510 nm/RIU for resonance located around 850 nm with a line-width of Ħ10 nm in solution. Experimental results are matched very well with numerical simulations. We also show that cross-polarization measurements can be employed to further improve the detection limit by increasing the signal-to-noise ratio. |
| first_indexed | 2024-09-23T16:50:30Z |
| format | Article |
| id | mit-1721.1/64455 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:50:30Z |
| publishDate | 2011 |
| publisher | SPIE |
| record_format | dspace |
| spelling | mit-1721.1/644552022-09-29T21:54:00Z Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors Huang, Min Yanik, Ahmet Ali Chang, Tsung-Yao Altug, Hatice Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Chang, Tsung-Yao Chang, Tsung-Yao In this paper, we introduce a novel sensor scheme which merges nano-photonics and nano-fluidics on a single platform through the use of free-standing photonic crystals (PhCs). PhCs offer great freedom to manipulate the spatial extent and the spectral characteristics of the electromagnetic fields. Also, nanoholes in PhCs provide a natural platform to transport solutions. By harnessing these nano-scale openings, we theoretically and experimentally demonstrate that both fluidics and light can be manipulated at sub-wavelength scales. In this scheme, the free standing PhCs are sealed in a chamber such that only the nano-scale hole arrays enable the flow between the top and the bottom channels. The nanohole arrays are used as sensing structures as well as nanofluidic channels. Compared to the conventional fluidic channels, we can actively steer the convective flow through the nanohole openings for effective delivery of the analytes to the sensor surface. This scheme also helps to overcome the surface tension of highly viscous solution and guarantees that the sensor can be totally immersed in solution. We apply this method to detect refractive index changes in aqueous solutions. Bulk measurements indicate that active delivery of the convective flow results in better performance. The sensitivity of the sensor reaches 510 nm/RIU for resonance located around 850 nm with a line-width of Ħ10 nm in solution. Experimental results are matched very well with numerical simulations. We also show that cross-polarization measurements can be employed to further improve the detection limit by increasing the signal-to-noise ratio. National Science Foundation (U.S.) (ECSS-0849603) National Science Foundation (U.S.) (EEC-0812056) Boston University. Photonics Center 2011-06-16T16:50:21Z 2011-06-16T16:50:21Z 2010-08 2010-08 Article http://purl.org/eprint/type/ConferencePaper 0277-786X http://hdl.handle.net/1721.1/64455 Min Huang, Ahmet Ali Yanik, Tsung-Yao Chang and Hatice Altug, "Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors", Proc. SPIE 7762, 77621Y (2010); doi:10.1117/12.860793 © 2010 COPYRIGHT SPIE--The International Society for Optical Engineering. en_US http://dx.doi.org/10.1117/12.860793 Proceedings of SPIE--the International Society for Optical Engineering; v. 7762 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf SPIE SPIE |
| spellingShingle | Huang, Min Yanik, Ahmet Ali Chang, Tsung-Yao Altug, Hatice Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors |
| title | Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors |
| title_full | Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors |
| title_fullStr | Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors |
| title_full_unstemmed | Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors |
| title_short | Integration of sub-wavelength nanofluidics on suspended photonic crystal sensors |
| title_sort | integration of sub wavelength nanofluidics on suspended photonic crystal sensors |
| url | http://hdl.handle.net/1721.1/64455 |
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