142 citations · 247 across the 9 of their papers we have counts for
10 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-…
Metasurface lens that is converging or diverging depending on transmission direction enables ultra-compact MEMS tunable reflective lens
Firehun Dullo, Jesil Jose, Gregory Bouquet +2
A conventional refractive lens surface can act as a positive (converging) or negative (diverging) lens, but the same surface cannot act as both. We show that a geometric phase meta…
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…
MEMS-tunable dielectric metasurface lens using thin-film PZT for large displacements at low voltages
Christopher A. Dirdal, Paul C. V. Thrane, Firehun T. Dullo +3
Tunable focusing is a desired property in a wide range of optical imaging and sensing technologies but has tended to require bulky components which cannot be integrated on-chip and…
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…
Roadmap on multimode light shaping
Marco Piccardo, Vincent Ginis, Andrew Forbes +35
Our ability to generate new distributions of light has been remarkably enhanced in recent years. At the most fundamental level, these light patterns are obtained by ingeniously com…
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…
Photonic-chip assisted correlative light and electron microscopy
Jean-Claude Tinguely, Anna Maria Steyer, Cristina Ionica Øie +6
Correlative light-electron microscopy (CLEM) unifies the versatility of light microscopy (LM) with the high resolution of electron microscopy (EM), allowing one to zoom into the co…
A Super-Condenser for Labelfree Nanoscopy
Florian Ströhl, Ida S. Opstad, Jean-Claude Tinguely +5
Labelfree nanoscopy encompasses optical imaging with resolution in the 100 nm range using visible wavelengths. Here, we present a labelfree nanoscopy method that combines Fourier p…
Structured illumination microscopy using a photonic chip
Øystein I. Helle, Firehun T. Dullo, Marcel Lahrberg +2
Structured illumination microscopy (SIM) enables live cell, super-resolution imaging at high speeds. SIM uses sophisticated optical systems to generate pre-determined excitation li…