Surface plasmon microscopic sensing with beam profile modulation
Surface Plasmon microscopy enables measurement of local refractive index on a far finer scale than prism based systems. An interferometric or confocal system gives the so-called V(z) curve when the sample is scanned axially, which gives a measure of the surface plasmon propagation velocity. We show...
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| Format: | Article |
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Optical Society of America
2012
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| Online Access: | https://eprints.nottingham.ac.uk/2869/ |
| _version_ | 1848790896332505088 |
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| author | Zhang, Bei Pechprasarn, Suejit Somekh, Michael G. |
| author_facet | Zhang, Bei Pechprasarn, Suejit Somekh, Michael G. |
| author_sort | Zhang, Bei |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Surface Plasmon microscopy enables measurement of local refractive index on a far finer scale than prism based systems. An interferometric or confocal system gives the so-called V(z) curve when the sample is scanned axially, which gives a measure of the surface plasmon propagation velocity. We show how a phase spatial light modulator (i) performs the necessary pupil function apodization (ii) imposes an angular varying phase shift that effectively changes sample defocus without any mechanical movement and (iii) changes the relative phase of the surface plasmon and reference beam to provide signal enhancement not possible with previous configurations. |
| first_indexed | 2025-11-14T18:19:54Z |
| format | Article |
| id | nottingham-2869 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T18:19:54Z |
| publishDate | 2012 |
| publisher | Optical Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-28692020-05-04T16:35:05Z https://eprints.nottingham.ac.uk/2869/ Surface plasmon microscopic sensing with beam profile modulation Zhang, Bei Pechprasarn, Suejit Somekh, Michael G. Surface Plasmon microscopy enables measurement of local refractive index on a far finer scale than prism based systems. An interferometric or confocal system gives the so-called V(z) curve when the sample is scanned axially, which gives a measure of the surface plasmon propagation velocity. We show how a phase spatial light modulator (i) performs the necessary pupil function apodization (ii) imposes an angular varying phase shift that effectively changes sample defocus without any mechanical movement and (iii) changes the relative phase of the surface plasmon and reference beam to provide signal enhancement not possible with previous configurations. Optical Society of America 2012-12-03 Article PeerReviewed Zhang, Bei, Pechprasarn, Suejit and Somekh, Michael G. (2012) Surface plasmon microscopic sensing with beam profile modulation. Optics Express, 20 (27). pp. 28039-28048. ISSN 1094-4087 http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-20-27-28039 doi:10.1364/OE.20.028039 doi:10.1364/OE.20.028039 |
| spellingShingle | Zhang, Bei Pechprasarn, Suejit Somekh, Michael G. Surface plasmon microscopic sensing with beam profile modulation |
| title | Surface plasmon microscopic sensing with beam profile modulation |
| title_full | Surface plasmon microscopic sensing with beam profile modulation |
| title_fullStr | Surface plasmon microscopic sensing with beam profile modulation |
| title_full_unstemmed | Surface plasmon microscopic sensing with beam profile modulation |
| title_short | Surface plasmon microscopic sensing with beam profile modulation |
| title_sort | surface plasmon microscopic sensing with beam profile modulation |
| url | https://eprints.nottingham.ac.uk/2869/ https://eprints.nottingham.ac.uk/2869/ https://eprints.nottingham.ac.uk/2869/ |