TY - GEN
T1 - Broadband near-field nonlinear Raman spectroscopy and nanoscopy
AU - Hayazawa, Norihiko
AU - Furusawa, Kentaro
AU - Kawata, Satoshi
PY - 2011/12/1
Y1 - 2011/12/1
N2 - We develop nonlinear optical spectroscopy for nanoscale chemical identification based on femtosecond light sources. The idea is based on our previously developed tip-enhanced spectroscopy. Combining the femtosecond light sources with a metallic tip generates a highly localized and intense electric field at the tip end that can be used as a nanoscale light source for variety of spectroscopy. However, the femtosecond pulse has a broadband spectrum, which often limits the spectral resolution, and moreover the shorter pulse duration results also in the higher nonresonant background generations (e.g. four-wave mixing, self phase modulation, etc) that also limits the sensitivity particularly when probing a nanoscale volume. In this contribution, we introduce several solutions for both spectral resolution and sensitivity issues. In addition to the development of the spectroscopic techniques, it is essential to develop non-optical feedback scheme for tip-sample distance control when using the broadband light source. We report it as well.
AB - We develop nonlinear optical spectroscopy for nanoscale chemical identification based on femtosecond light sources. The idea is based on our previously developed tip-enhanced spectroscopy. Combining the femtosecond light sources with a metallic tip generates a highly localized and intense electric field at the tip end that can be used as a nanoscale light source for variety of spectroscopy. However, the femtosecond pulse has a broadband spectrum, which often limits the spectral resolution, and moreover the shorter pulse duration results also in the higher nonresonant background generations (e.g. four-wave mixing, self phase modulation, etc) that also limits the sensitivity particularly when probing a nanoscale volume. In this contribution, we introduce several solutions for both spectral resolution and sensitivity issues. In addition to the development of the spectroscopic techniques, it is essential to develop non-optical feedback scheme for tip-sample distance control when using the broadband light source. We report it as well.
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U2 - 10.1109/IQEC-CLEO.2011.6193761
DO - 10.1109/IQEC-CLEO.2011.6193761
M3 - Conference contribution
AN - SCOPUS:84862079284
SN - 9780977565771
T3 - 2011 Int. Quantum Electron. Conf., IQEC 2011 and Conf. Lasers and Electro-Optics, CLEO Pacific Rim 2011 Incorporating the Australasian Conf. Optics, Lasers and Spectroscopy and the Australian Conf.
SP - 922
EP - 924
BT - 2011 Int. Quantum Electr. Conf., IQEC 2011 Conf Lasers Electro-Optics, CLEO Pacific Rim 2011 Incorporating Australasian Conf. on Optics, Lasers Spectrosc. Australian Conf. Optical Fibre Technol.- Conf
T2 - 2011 International Quantum Electronics Conference, IQEC 2011 and Conference on Lasers and Electro-Optics, CLEO Pacific Rim 2011
Y2 - 28 August 2011 through 1 September 2011
ER -