26 citations · 61 across the 7 of their papers we have counts for
7 papers
Piezoelectric MEMS Phase Modulator for Silicon Nitride Platform in the Visible Spectrum
Firehun T. Dullo, Paul C. Thrane, Nikhil Jayakumar +4
Active photonic integrated circuits (PICs) in the visible spectrum are essential for on-chip applications, requiring low-loss waveguides with broad transparency and efficient, low-…
Label-free incoherent super-resolution optical microscopy
Nikhil Jayakumar, Luis E. Villegas-Hernandez, Weisong Zhao +6
The photo-kinetics of fluorescent molecules have enabled the circumvention of far-field optical diffraction-limit. Despite its enormous potential, the necessity to label the sample…
Label-free chip-based evanescent light scattering super-resolution and superior-contrast optical microscopy (cELS)
Nikhil Jayakumar, Firehun T Dullo, Vishesh Dubey +7
Chip-based Evanescent Light Scattering (cELS) utilizes the multiple modes of a high-index contrast optical waveguide for near-field illumination of unlabeled samples, thereby repos…
Demystifying speckle field quantitative phase microscopy
Azeem Ahmad, Nikhil Jayakumar, Balpreet Singh Ahluwalia
Quantitative phase microscopy (QPM) has found significant applications in the field of biomedical imaging which works on the principle of interferometry. The theory behind achievin…
High throughput spatially sensitive single-shot quantitative phase microscopy
Azeem Ahmad, Vishesh Dubey, Nikhil Jayakumar +7
High space-bandwidth product with high spatial phase sensitivity is indispensable for a single-shot quantitative phase microscopy (QPM) system. It opens avenue for widespread appli…
On-chip TIRF nanoscopy by applying Haar wavelet kernel analysis on intensity fluctuations induced by chip illumination
Nikhil Jayakumar, Øystein I Helle, Krishna Agarwal +1
Photonic-chip based TIRF illumination has been used to demonstrate several on-chip optical nanoscopy methods. The sample is illuminated by the evanescent field generated by the ele…
A transparent waveguide chip for versatile TIRF-based microscopy and nanoscopy
Anish Priyadarshi, Firehun Tsige Dullo, Deanna L. Wolfson +6
Total internal reflection fluorescence microscopy (TIRF) has enabled low-background, live-cell friendly imaging of cell surfaces and other thin samples thanks to the shallow penetr…