Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy
Absorption spectroscopy in the long wave infrared provides an effective method for identification of various hazardous chemicals. We present a theoretical design for plasmonic band-pass filters that can be used to provide wavelength selectivity for uncooled microbolometer sensors. The microfilters c...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | International Journal of Optics |
| Online Access: | http://dx.doi.org/10.1155/2012/916482 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832559107451650048 |
|---|---|
| author | J. M. Banks P. D. Flammer T. E. Furtak R. E. Hollingsworth R. T. Collins |
| author_facet | J. M. Banks P. D. Flammer T. E. Furtak R. E. Hollingsworth R. T. Collins |
| author_sort | J. M. Banks |
| collection | DOAJ |
| description | Absorption spectroscopy in the long wave infrared provides an effective method for identification of various hazardous chemicals. We present a theoretical design for plasmonic band-pass filters that can be used to provide wavelength selectivity for uncooled microbolometer sensors. The microfilters consist of a pair of input reflection gratings that couple light into a plasmonic waveguide with a central resonant waveguide cavity. An output transmission grating on the other side of the structure pulls light out of the waveguide where it is detected by a closely spaced sensor. Fabrication of the filters can be performed using standard photolithography procedures. A spectral bandpass with a full-width at half-maximum (FWHM) of 100 nm can be obtained with a center wavelength spanning the entire 8–12 μm atmospheric transmission window by simple geometric scaling of only the lateral dimensions. This allows the simultaneous fabrication of all the wavelength filters needed for a full spectrometer on a chip. |
| format | Article |
| id | doaj-art-e8e329a64f094bd5a77b39be82cfda62 |
| institution | Kabale University |
| issn | 1687-9384 1687-9392 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Optics |
| spelling | doaj-art-e8e329a64f094bd5a77b39be82cfda622025-02-03T01:30:52ZengWileyInternational Journal of Optics1687-93841687-93922012-01-01201210.1155/2012/916482916482Plasmonic Band-Pass Microfilters for LWIR Absorption SpectroscopyJ. M. Banks0P. D. Flammer1T. E. Furtak2R. E. Hollingsworth3R. T. Collins4Department of Physics, Colorado School of Mines, 1500 Illinois Street, Golden, CO 80401, USADepartment of Physics, Colorado School of Mines, 1500 Illinois Street, Golden, CO 80401, USADepartment of Physics, Colorado School of Mines, 1500 Illinois Street, Golden, CO 80401, USAThin Film Technologies Division, ITN Energy Systems, Inc., 8130 Shaffer Parkway, Littleton, CO 80127, USADepartment of Physics, Colorado School of Mines, 1500 Illinois Street, Golden, CO 80401, USAAbsorption spectroscopy in the long wave infrared provides an effective method for identification of various hazardous chemicals. We present a theoretical design for plasmonic band-pass filters that can be used to provide wavelength selectivity for uncooled microbolometer sensors. The microfilters consist of a pair of input reflection gratings that couple light into a plasmonic waveguide with a central resonant waveguide cavity. An output transmission grating on the other side of the structure pulls light out of the waveguide where it is detected by a closely spaced sensor. Fabrication of the filters can be performed using standard photolithography procedures. A spectral bandpass with a full-width at half-maximum (FWHM) of 100 nm can be obtained with a center wavelength spanning the entire 8–12 μm atmospheric transmission window by simple geometric scaling of only the lateral dimensions. This allows the simultaneous fabrication of all the wavelength filters needed for a full spectrometer on a chip.http://dx.doi.org/10.1155/2012/916482 |
| spellingShingle | J. M. Banks P. D. Flammer T. E. Furtak R. E. Hollingsworth R. T. Collins Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy International Journal of Optics |
| title | Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy |
| title_full | Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy |
| title_fullStr | Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy |
| title_full_unstemmed | Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy |
| title_short | Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy |
| title_sort | plasmonic band pass microfilters for lwir absorption spectroscopy |
| url | http://dx.doi.org/10.1155/2012/916482 |
| work_keys_str_mv | AT jmbanks plasmonicbandpassmicrofiltersforlwirabsorptionspectroscopy AT pdflammer plasmonicbandpassmicrofiltersforlwirabsorptionspectroscopy AT tefurtak plasmonicbandpassmicrofiltersforlwirabsorptionspectroscopy AT rehollingsworth plasmonicbandpassmicrofiltersforlwirabsorptionspectroscopy AT rtcollins plasmonicbandpassmicrofiltersforlwirabsorptionspectroscopy |