Differential near-field scanning optical microscopy with THz quantum cascade laser sources
| Autor: | M. Montinaro, Fabio Beltram, Vincenzo Piazza, Alessandro Tredicucci, David A. Ritchie, Riccardo Degl'Innocenti, Pasqualantonio Pingue, Harvey E. Beere, Ji-Hua Xu |
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| Přispěvatelé: | Deglinnocenti, R., Montinaro, M., Xu, Jihua, Piazza, V., Pingue, Pasqualantonio, Tredicucci, A., Beltram, Fabio, Beere, H. E., Ritchie, D. A. |
| Rok vydání: | 2010 |
| Předmět: |
Terahertz radiation
near field Microscopy Acoustic scanning probe microscopy Physics::Optics law.invention Optics Terahertz Imaging Optical microscope law Lighting Physics business.industry Near-field optics Finite-difference time-domain method Equipment Design Image Enhancement Atomic and Molecular Physics and Optics Terahertz spectroscopy and technology Equipment Failure Analysis Wavelength Optoelectronics Computer-Aided Design THz Near-field scanning optical microscope Lasers Semiconductor business Quantum cascade laser Terahertz Radiation |
| Zdroj: | ResearcherID |
| ISSN: | 1094-4087 |
| Popis: | We have realized a differential Near-field Scanning Optical Microscope (NSOM) working with subwavelength resolution in the THz spectral region. The system employs a quantum cascade laser emitting at lambda approximately 105 microm as source, and the method, differently from conventional NSOM, involves diffracting apertures with size comparable to the wavelength. This concept ensures a higher signal-to-noise level at the expense of an additional computational step. In the implementation here reported lambda/10 resolution has been achieved; present limiting factors are investigated through finite difference time domain simulations. |
| Databáze: | OpenAIRE |
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