Taco D. Visser is a Professor of Physics at Vrije Universiteit Amsterdam. He has published more than one hundred papers on various topics in optics, such as scattering, diffraction, waveguides, coherence theory, singular optics and surface plasmon polaritions. Next to his theoretical work he is also actively engaged in experiments in nano-optics.

• Preface Taco D. Visser 1. Integration on a microchip: A glimpse into the future of optical coherence tomography B. Imran Akca, Lantian Chang and Gunay Yurtsever 2. Small focal spot formation by vector beams Kozawa Yuichi and Shunichi Sato 3. Ground states of coupled nonlinear oscillator systems Uri Levy 4. Characteristics of equilibrated nonlinear oscillator systems Uri Levy 5. Advances in optical imaging of drug delivery across the blood-brain barrier Weichen Wei, Xuejiao Wang, Yajuan Li, Yong Cheng, Anthony A. Fung, Xinyi Yang, Jane Y. Wu and Lingyan Shi

Taco D. Visser is a Professor of Physics at Vrije Universiteit Amsterdam. He has published more than one hundred papers on various topics in optics, such as scattering, diffraction, waveguides, coherence theory, singular optics and surface plasmon polaritions. Next to his theoretical work he is also actively engaged in experiments in nano-optics.

• Preface Taco D. Visser 1. Integration on a microchip: A glimpse into the future of optical coherence tomography B. Imran Akca, Lantian Chang and Gunay Yurtsever 2. Small focal spot formation by vector beams Kozawa Yuichi and Shunichi Sato 3. Ground states of coupled nonlinear oscillator systems Uri Levy 4. Characteristics of equilibrated nonlinear oscillator systems Uri Levy 5. Advances in optical imaging of drug delivery across the blood-brain barrier Weichen Wei, Xuejiao Wang, Yajuan Li, Yong Cheng, Anthony A. Fung, Xinyi Yang, Jane Y. Wu and Lingyan Shi

Taco D. Visser is a Professor of Physics at Vrije Universiteit Amsterdam. He has published more than one hundred papers on various topics in optics, such as scattering, diffraction, waveguides, coherence theory, singular optics and surface plasmon polaritions. Next to his theoretical work he is also actively engaged in experiments in nano-optics.

• Preface Taco D. Visser 1. Integration on a microchip: A glimpse into the future of optical coherence tomography B. Imran Akca, Lantian Chang and Gunay Yurtsever 2. Small focal spot formation by vector beams Kozawa Yuichi and Shunichi Sato 3. Ground states of coupled nonlinear oscillator systems Uri Levy 4. Characteristics of equilibrated nonlinear oscillator systems Uri Levy 5. Advances in optical imaging of drug delivery across the blood-brain barrier Weichen Wei, Xuejiao Wang, Yajuan Li, Yong Cheng, Anthony A. Fung, Xinyi Yang, Jane Y. Wu and Lingyan Shi