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Search Publications by: Junyeob Song (Assoc)

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Displaying 1 - 13 of 13

Enhanced zero-phonon line emission from an ensemble of W centers in circular and bowtie Bragg grating cavities

November 19, 2024
Author(s)
Vijin Kizhake Veetil, Junyeob Song, Pradeep Namboodiri, Nikki Ebadollahi, Ashish Chanana, Aaron Katzenmeyer, Christian Pederson, Joshua Pomeroy, Jeff Chiles, Jeff Shainline, Kartik Srinivasan, Marcelo Davanco, Matthew Pelton
Color centers in silicon have recently gained considerable attention as a single-photon source [1,2] and as a spin qubit-photon interface [3] for quantum information applications. However, one of the major bottlenecks is their low overall brightness due to

Three-dimensional, multi-wavelength beam formation with integrated metasurface optics for Sr laser c

October 17, 2024
Author(s)
Sindhu Jammi, Andrew Ferdinand, Zheng Luo, Zachary Newman, Grisha Spektor, Junyeob Song, Okan Koksal, William Lunden, Daniel Sheredy, Parth Patel, Martin Boyd, Wenqi Zhu, Amit Agrawal, Travis Briles, Scott Papp
We demonstrate formation of a complex, multi-wavelength, three-dimensional laser beam configuration with integrated metasurface optics. Our experiments support development of a compact Sr optical-lattice clock, which leverages magnetooptical trapping on

Low-power, agile electro-optic frequency comb spectrometer for integrated sensors

March 11, 2024
Author(s)
Kyunghun Han, David Long, Sean Bresler, Junyeob Song, Yiliang Bao, Benjamin Reschovsky, Kartik Srinivasan, Jason J. Gorman, Vladimir Aksyuk, Thomas W. LeBrun
Sensing platforms based upon photonic integrated circuits have shown considerable promise; however, they require corresponding advancements in integrated optical readout technologies. Here, we present an on-chip spectrometer that leverages an integrated

Synthesizing ultrafast optical pulses with arbitrary spatiotemporal control

October 26, 2022
Author(s)
Lu Chen, Wenqi Zhu, Pengcheng Huo, Junyeob Song, Henri Lezec, Ting Xu, Amit Agrawal
The ability to control the instantaneous state of light – its phase, amplitude, polarization, or wavefront – of high-energy pulses down to the single-photon level is an indispensable and a necessary requirement in photonics. This has, for example

Broadband Nanoscale Surface-Enhanced Raman Spectroscopy by Multiresonant Nanolaminate Plasmonic Nanocavities on Vertical Nanopillars

August 8, 2022
Author(s)
Meitong Nie, Yuming Zhao, Wonil Nam, Junyeob Song, Wenqi Zhu, Henri Lezec, Amit Agrawal, Wei Zhou
Surface-enhanced Raman spectroscopy (SERS) has become a sensitive detection technique for biochemical analysis. Despite significant research efforts, most SERS substrates consisting of single-resonant plasmonic nanostructures on the planar surface suffer

Plasmonic Electronic Raman Scattering as Internal Standard for Spatial and Temporal Calibration in Quantitative Surface-enhanced Raman Spectroscopy

October 28, 2020
Author(s)
Wonil Nam, Yuming Zhao, Junyeob Song, Seied Ali Safiabadi Tali, Seju Kang, Wenqi Zhu, Henri Lezec, Amit Agrawal, Peter J. Vikesland, Wei Zhou
Ultrasensitive surface-enhanced Raman spectroscopy (SERS) still faces difficulties in quantitative analysis because of its susceptibility to local optical field variations at plasmonic hotspots in metallo-dielectric nanostructures. Current SERS calibration

Ultrathin Wetting Layer-Free Plasmonic Gold Films

October 3, 2019
Author(s)
Robert Lemasters, Cheng Zhang, Manoj Manjare, Wenqi Zhu, Junyeob Song, Sergei Urazhdin, Henri Lezec, Amit Agrawal, Hayk Harutyunyan
Ultrathin gold films are attractive for plasmonic and metamaterial devices, thanks to their useful optical and optoelectronic properties. However, deposition of ultrathin continuous Au films of few nanometer thickness is challenging and generally requires