Abstract

The optical extinction of single nanoparticles can be sensitively detected by spatial modulation spectroscopy (SMS), where the particle is moved in and out of a tightly focused laser beam with a piezo-device. Here we show that high sensitivity can be obtained by modulating the beam with a galvo-mirror system, rather than by moving the sample. This work demonstrates an inexpensive method for making a SMS microscope, and shows how an existing laser scanning microscope can be adapted for SMS measurements. The galvo-mirror technique also allows SMS measurements to be performed in a liquid, which is difficult to do with piezo-modulation.

© 2013 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Spatial modulation spectroscopy imaging of nano-objects of different sizes and shapes

Tuphan Devkota, Mary Sajini Devadas, Andrew Brown, Joseph Talghader, and Gregory V. Hartland
Appl. Opt. 55(4) 796-801 (2016)

Measuring rough optical surfaces using scanning long-wave optical test system. 1. Principle and implementation

Tianquan Su, Shanshan Wang, Robert E. Parks, Peng Su, and James H. Burge
Appl. Opt. 52(29) 7117-7126 (2013)

Study on effective cleaning of gold layer from fused silica mirrors using nanosecond-pulsed Nd:YAG laser

Ambar Choubey, Amol Singh, M. H. Modi, B. N. Upadhyaya, G. S. Lodha, and S. M. Oak
Appl. Opt. 52(31) 7540-7548 (2013)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription