Publications (61)
Ly imaging around the hyperluminous dust-obscured quasar W22460526 at
Yibin Luo, Lulu Fan, Yongming Liang +10
Hot dust-obscured galaxies (Hot DOGs) are a population of hyperluminous, heavily obscured quasars discovered by the \emph{Wide-field Infrared Survey Explorer} (\emph{WISE}) all-sky…
Ultrasensitive and broadband MoS2 photodetector driven by ferroelectrics
Xudong Wang, Peng Wang, Jianlu Wang +15
Photodetectors based on two dimensional materials have attracted growing interest. However, the sensitivity is still unsatisfactory even under high gate voltage. Here we demonstrat…
Analytical impact excitation of Er/O/B co-doped Si light emitting diodes
Xiaoming Wang, Jiajing He, Ao Wang +6
Er doped Si light emitting diodes may find important applications in the generation and storage of quantum information. These diodes exhibit an emission efficiency two orders of ma…
Extended Enriched Gas in a Multi-Galaxy Merger at Redshift 6.7
Weida Hu, Casey Papovich, Lu Shen +5
Recent JWST observations have uncovered high-redshift galaxies characterized by multiple star-forming clumps, many of which appear to be undergoing mergers. Such mergers, especiall…
CLASSY XI: Tracing Neutral Gas Properties using UV Absorption Lines and 21-cm Observations
Kaelee S. Parker, Danielle A. Berg, Simon Gazagnes +15
Rest-frame far-ultraviolet (FUV) observations from JWST are revolutionizing our understanding of the high-z galaxies that drove reionization and the mechanisms by which they accomp…
NGDEEP: The Star Formation and Ionization Properties of Galaxies at
Lu Shen, Casey Papovich, Jasleen Matharu +23
We use JWST/NIRISS slitless spectroscopy from the Next Generation Deep Extragalactic Exploratory Public (NGDEEP) Survey to investigate the physical condition of star-forming galaxi…
LAGER Ly Luminosity Function at , Implications for Reionization
Isak G. B. Wold, Sangeeta Malhotra, James Rhoads +17
We present a new measurement of the Ly luminosity function at redshift , finding moderate evolution from that is consistent with a fully or largely ionized $z\si…
ReS2-based field-effect transistors and photodetectors
Enze Zhang, Yibo Jin, Xiang Yuan +7
Atomically-thin two-dimensional (2D) layered transition metal dichalcogenides (TMDs) have been extensively studied in recent years because of their appealing electrical and optical…
High responsivity phototransistors based on few-layer ReS2 for weak signal detection
Erfu Liu, Mingsheng Long, Junwen Zeng +18
Two-dimensional transition metal dichalcogenides are emerging with tremendous potential in many optoelectronic applications due to their strong light-matter interactions. To fully…
Optical Strong Line Ratios Cannot Distinguish Between Stellar Populations and Accreting Black Holes at High Ionization Parameters and Low Metallicities
Nikko J. Cleri, Grace M. Olivier, Bren E. Backhaus +24
High-redshift observations from JWST indicate that optical strong line ratios do not carry the same constraining power as they do at low redshifts. Critically, this prevents a sepa…
The Hubble Deep Hydrogen Alpha (HDH) Project: I. Catalog of Emission-line Galaxies
Shuairu Zhu, Zhen-Ya Zheng, James Rhoads +14
We present the first results of the Hubble Deep Hydrogen Alpha (HDH) project, which analyzes the space-borne deep H narrowband imaging data in the GOODS-S region. The HDH$Î…
Physical Origins of Outflowing Cold Clouds in Local Star-forming Dwarf Galaxies
Zixuan Peng, Crystal L. Martin, Zirui Chen +10
We study the physical origins of outflowing cold clouds in a sample of 14 low-redshift dwarf ( ) galaxies from the COS Legacy Archive Spectros…
Very bright, very blue, and very red: JWST CAPERS analysis of highly luminous galaxies with extreme UV slopes at
Callum T. Donnan, Mark Dickinson, Anthony J. Taylor +37
We present JWST/NIRSpec PRISM observations of three luminous () galaxies at observed with the CAPERS Cycle 3 program. These galaxies exhibit extreme UV sl…
Room temperature Si:S barrier infrared detector with broadband response up to 4.4μm
He Zhu, Yunlong Xiao, Zhongyang Yu +11
Mid-infrared spectrum is a critical tool for chemical analysis, industrial inspection, environment, and other fields due to its rich chemical bond information. However, the complic…
First Results from the Lyman Alpha Galaxies in the Epoch of Reionization (LAGER) Survey: Cosmological Reionization at z ~ 7
Zhen-Ya Zheng, Junxian Wang, James Rhoads +12
We present the first results from the ongoing LAGER project (Lyman Alpha Galaxies in the Epoch of Reionization), which is the largest narrowband survey for 7 galaxies to d…
Photonic logic tensor computing beyond TOPS per core
Wenkai Zhang, Bo Wu, Wentao Gu +13
The soaring demand for computing resources has spurred great interest in photonic computing with higher speed and larger computing capacity. Photonic logic gates are of crucial imp…
The HST-Hyperion Survey: Environmental Imprints on the Stellar-Mass Function at z~2.5
Derek Sikorski, Ben Forrest, Brian C. Lemaux +19
Not all galaxies at Cosmic Noon evolve in the same way. It remains unclear how the local environment -- especially the extreme overdensities of protoclusters -- affects stellar mas…
Observation of ballistic avalanche phenomena in nanoscale vertical InSe/BP heterostructures
Anyuan Gao, Jiawei Lai, Yaojia Wang +13
Initiating impact ionization of avalanche breakdown essentially requires applying a high electric field in a long active region, hampering carrier-multiplication with high gain, lo…
Room-temperature high detectivity mid-infrared photodetectors based on black arsenic phosphorus
Mingsheng Long, Anyuan Gao, Peng Wang +12
The mid-infrared (MIR) spectral range, pertaining to important applications such as molecular 'fingerprint' imaging, remote sensing, free space telecommunication and optical radar,…
Analytical photoresponses of Schottky contact MoS2 phototransistors
Jianyong Wei, Yumeng Liu, Yizhuo Wang +10
High-gain photodetectors based on two-dimensional (2D) semiconductors, in particular those in photoconductive mode, have been extensively investigated in the past decade. However,…
Using KCWI to Explore the Chemical Inhomogeneities and Evolution of J1044+0353
Zixuan Peng, Crystal L. Martin, Pierre Thibodeaux +3
J1044+0353 is considered a local analog of the young galaxies that ionized the intergalactic medium at high-redshift due to its low mass, low metallicity, high specific star format…
Negative Photoconductance in van der Waals Heterostructures-Based Floating Gate Phototransistor
Yu Wang, Erfu Liu, Anyuan Gao +9
Van der Waals (vdW) heterostructures made of two-dimensional materials have been demonstrated to be versatile architectures for optoelectronic applications due to strong light-matt…
Galaxy Protoclusters as Drivers of Cosmic Reionization: I. Bubble Overlap at Redshift z ~ 7 in LAGER-z7OD1
Crystal L. Martin, Weida Hu, Isak G. B. Wold +17
Since the launch of JWST, the sample size of reionization-era Lyman-alpha-emitters (LAEs) has been steadily growing; yet inferences about the neutral hydrogen fraction in the inter…
NGDEEP Epoch 1: Spatially Resolved H Observations of Disk and Bulge Growth in Star-Forming Galaxies at 0.6-2.2 from JWST NIRISS Slitless Spectroscopy
Lu Shen, Casey Papovich, Jasleen Matharu +21
We study the H equivalent width, EW(H), maps of 19 galaxies at in the Hubble Ultra Deep Field (HUDF) derived from NIRISS slitless spectroscopy as part of th…
Edge-Epitaxial Growth of InSe Nanowires toward High-Performance Photodetectors
Song Hao, Shengnan Yan, Yang Wang +17
Semiconducting nanowires offer many opportunities for electronic and optoelectronic device applications due to their special geometries and unique physical properties. However, it…
The Ly Luminosity Function and Cosmic Reionization at 7.0: a Tale of Two LAGER Fields
Weida Hu, Junxian Wang, Zhen-Ya Zheng +20
We present the largest-ever sample of 79 Ly emitters (LAEs) at 7.0 selected in the COSMOS and CDFS fields of the LAGER project (the Lyman Alpha Galaxies in the Epoch of…
Correlations between H Equivalent Width and Galaxy Properties at : Physical or Selection-driven?
Ali Ahmad Khostovan, Sangeeta Malhotra, James E. Rhoads +13
The H equivalent width (EW) is an observational proxy for specific star formation rate (sSFR) and a tracer of episodic star-formation activity. Previous assessments show that E…
Using Ly Transmitted Spectrum to Probe IGM Transmission and Identify Ionized Structures in Cosmic Reionization
Weida Hu, Casey Papovich, Lu Shen +16
We present a study of intergalactic medium (IGM) transmission at using high-signal-to-noise JWST/NIRSpec prism spectroscopy of 143 galaxies at from the CAPE…
Deep Spectroscopic Follow-Up of Maisie's Galaxy -- A Typical Galaxy in the Early Universe
Rebecca L. Larson, Taylor A. Hutchison, Steven L. Finkelstein +26
The first several years of JWST observations have yielded surprisingly large numbers of bright galaxies, with follow-up spectroscopy of many of these sources implying extrem…
A Dual-gate MoS2 Photodetector Based on Interface Coupling Effect
Fuyou Liao, Jianan Deng, Xinyu Chen +13
Two-dimensional (2D) transition metal dichalcogenides (TMDs) based photodetectors have shown great potential for the next generation optoelectronics. However, most of the reported…
Gate-Tunable Semiconductor Heterojunctions from 2D/3D van der Waals Interfaces
Jinshui Miao, Xiwen Liu, Kiyoung Jo +8
Van der Waals (vdW) semiconductors are attractive for highly scaled devices and heterogeneous integration since they can be isolated into self-passivated, two-dimensional (2D) laye…
Lyman Alpha Galaxies in the Epoch of Reionization (LAGER): Spectroscopic Confirmation of Two Redshift ~ 7.0 Galaxies
Huan Yang, Leopoldo Infante, James E. Rhoads +7
We spectroscopically confirmed two narrow-band selected redshift 7.0 Ly galaxies and studied their restframe UV spectra. The Ly and other UV nebular lines are very useful t…
Galaxies in the Epoch of Reionization Are All Bark and No Bite -- Plenty of Ionizing Photons, Low Escape Fractions
Casey Papovich, Justin W. Cole, Weida Hu +27
Early results from JWST suggest that epoch-of-reionization (EoR) galaxies produce copious ionizing photons, which, if they escape efficiently, could cause reionization to occur too…
The quasi-star model for Little Red Dots: potential and challenges
Fabrizio Gentile, Mauro Giavalisco, Emanuele Daddi +25
(Abridged) Little Red Dots (LRDs) are a class of sources discovered by JWST observationally defined by a "V-shaped" rest-frame UV-Optical SED, a compact or unresolved morphology, a…
CLASSY VII Lyα Profiles: The Structure and Kinematics of Neutral Gas and Implications for LyC Escape in Reionization-Era Analogs
Weida Hu, Crystal L. Martin, Max Gronke +22
Lyman-alpha line profiles are a powerful probe of ISM structure, outflow speed, and Lyman continuum escape fraction. In this paper, we present the Ly line profiles of the COS L…
Extreme Emission Line Galaxies in CEERS Are Powered by Star Formation, not AGN
Kelcey Davis, Madisyn Brooks, Jonathan R. Trump +28
We present a spectroscopic study of photometrically identified extreme emission-line galaxies (EELGs) with observed-frame equivalent widths (EWs) >5000 A of either H alpha or H bet…
Water induced bandgap engineering in nanoribbons of hexagonal boron nitride
Chen Chen, Yang Hang, Hui Shan Wang +13
Different from hexagonal boron nitride (hBN) sheets, the bandgap of hBN nanoribbons (BNNRs) can be changed by spatial/electrostatic confinement. It has been predicted that a transv…
AT2023lli: A Tidal Disruption Event with Prominent Optical Early Bump and Delayed Episodic X-ray Emission
Shifeng Huang, Ning Jiang, Jiazheng Zhu +42
High-cadence, multiwavelength observations have continuously revealed the diversity of tidal disruption events (TDEs), thus greatly advancing our knowledge and understanding of TDE…
Design for the First Narrowband Filter for the Dark Energy Camera: Optimizing the LAGER Survey for z ~ 7 Galaxies
Zhen-Ya Zheng, James E. Rhoads, Junxian Wang +22
We present the design for the first narrowband filter NB964 for the Dark Energy Camera (DECam), which is operated on the 4m Blanco Telescope at the Cerro Tololo Inter-American Obse…
High-performance graphene photodetector by interfacial gating
Xitao Guo, Wenhui Wang, Haiyan Nan +10
Graphene based photo-detecting has received great attentions and the performance of such detector is stretching to both ends of high sensitivity and ultra-fast response. However, l…
Arrayed van der Waals Vertical Heterostructures based on 2D GaSe Grown by Molecular Beam Epitaxy
Xiang Yuan, Lei Tang, Shanshan Liu +12
Vertically stacking two dimensional (2D) materials can enable the design of novel electronic and optoelectronic devices and realize complex functionality. However, the fabrication…
A Lyman-α protocluster at redshift 6.9
Weida Hu, Junxian Wang, Leopoldo Infante +21
Protoclusters, the progenitors of the most massive structures in the Universe, have been identified at redshifts of up to 6.6. Besides exploring early structure formation, searchin…
Implications of Broad [O III] 4364 and UV Line Emission in Two Little Red Dots at z ~ 7 - 8
Casey Papovich, Kaila Ronayne, Weida Hu +17
We present deep, NIRSpec G140M and G395M spectroscopy of Little Red Dots (LRDs) at z = 6.68 and z = 8.35. Both LRDs show broad Balmer and [O III] 4364 emission. The broad [O III…
Characterizing the Average Interstellar Medium Conditions of Galaxies at 5.6-9 with UV and Optical Nebular Lines
Weida Hu, Casey Papovich, Mark Dickinson +30
Ultraviolet (UV; rest-frame A) spectra provide a wealth of diagnostics to characterize fundamental galaxy properties, such as their chemical enrichment, the nature…
Reversible Engineering of Topological Insulator Surface State Conductivity through Optical Excitation
Faji Xie, Zhen Lian, Shuai Zhang +13
Despite the broadband response, limited optical absorption at a particular wavelength hinders the development of optoelectronics based on Dirac fermions. Heterostructures of graphe…
Chargeable photoconductivity in Van der Waals heterojunctions
Yucheng Jiang, Anpeng He, Yu Chen +9
Van der Waals (vdW) heterojunctions, based on two-dimensional (2D) materials, show great potential for the development of eco-friendly and high-efficiency nano-devices. Considerabl…
The Cosmic Evolution Early Release Science Survey (CEERS)
Steven L. Finkelstein, Micaela B. Bagley, Pablo Arrabal Haro +96
We present the Cosmic Evolution Early Release Science (CEERS) Survey, a 77.2 hour Director's Discretionary Early Release Science Program. CEERS demonstrates, tests, and validates e…
Intrinsic p-type W-based transition metal dichalcogenide by substitutional Ta-doping
Yajun Fu, Mingsheng Long, Anyuan Gao +10
Two-dimensional (2D) transition metal dichalcogenides (TMDs) have recently emerged as promising candidates for future electronics and optoelectronics. While most of TMDs are intrin…
New spectroscopic confirmations of Lyman- emitters at z 7 from the LAGER survey
Santosh Harish, Isak G. B. Wold, Sangeeta Malhotra +14
We report spectroscopic confirmations of 15 Lyman-alpha galaxies at , implying a spectroscopic confirmation rate of 80% on candidates selected from LAGER (Lyman-Alpha…
NbSiTe: A Stable Narrow-Gap Two-Dimensional Material with Ambipolar Transport and Mid-Infrared Response
Mingxing Zhao, Wei Xia, Yang Wang +5
Two-dimensional (2D) materials with narrow band gaps (~0.3 eV) are of great importance for realizing ambipolar transistors and mid-infrared (MIR) detection. However, most of the 2D…
The GlimmIr: Spectroscopic Variability in a z~7 LRD Indicates Rapid Changes in Both the Narrow and Broad Line Regions
Erini Lambrides, Taylor A. Hutchison, Rebecca L. Larson +39
The enigmatic population of ``Little Red Dots'' (LRDs) sit at the center of some of the largest debates in extragalactic astronomy today. The source(s) of ionizing emission and the…
Wafer-scale arrayed p-n junctions based on few-layer epitaxial GaTe
Xiang Yuan, Lei Tang, Peng Wang +12
Two-dimensional (2D) materials have attracted substantial attention in electronic and optoelectronic applications with superior advantages of being flexible, transparent and highly…
Broadband Photovoltaic Detectors based on an Atomically Thin Heterostructure
Mingsheng Long, Erfu Liu, Peng Wang +19
Van der Waals junctions of two-dimensional materials with an atomically sharp interface open up unprecedented opportunities to design and study functional heterostructures. Semicon…
The 2.5-meter Wide Field Survey Telescope Real-time Data Processing Pipeline I: From raw data to alert distribution
Minxuan Cai, Zelin Xu, Lulu Fan +13
The Wide Field Survey Telescope (WFST) is a dedicated photometric surveying facility built jointly by the University of Science and Technology of China (USTC) and the Purple Mounta…
On the Origin of the Strong Optical Variability of Emission-line Galaxies
Ruqiu Lin, Zhen-Ya Zheng, Weida Hu +9
Emission-line galaxies (ELGs) are crucial in understanding the formation and evolution of galaxies, while little is known about their variability. Here we report the study on the o…
First Spectroscopic Confirmations of z ~ 7.0 Lya Emitting Galaxies in the LAGER Survey
Weida Hu, Junxian Wang, Zhenya Zheng +16
Narrowband imaging is a highly successful approach for finding large numbers of high redshift Lya emitting galaxies (LAEs) up to z~6.6. However, at z>~7 there are as yet only 3 nar…
A large, deep 3 deg survey of H, [OIII], and [OII] emitters from LAGER: constraining luminosity functions
Ali Ahmad Khostovan, Sangeeta Malhotra, James E. Rhoads +14
We present our measurements of the H, [OIII], and [OII] luminosity functions as part of the Lyman Alpha Galaxies at Epoch of Reionization (LAGER) survey using our samples of 15…
The HST-Hyperion Survey: Grism Observations of a Proto-Supercluster
Ben Forrest, Lu Shen, Brian C. Lemaux +19
We present first results and catalogs from the HST-Hyperion survey. This survey has collected 50 orbits of WFC3/F160W imaging and WFC3/G141 grism spectroscopy in the most overdense…
Discovery of spectacular quasar-driven superbubbles in red quasars
Lu Shen, Guilin Liu, Zhicheng He +7
Quasar-driven outflows on galactic scales are a routinely invoked ingredient for galaxy formation models. We report the discovery of ionized gas nebulae as traced by [O III] 50…
Palladium Diselenide Long-Wavelength Infrared Photodetector with High Sensitivity and Stability
Mingsheng Long, Yang Wang, Peng Wang +11
A long-wavelength infrared (IR) photodetector based on two-dimensional materials working at room temperature would have wide applications in many aspects in remote sensing, thermal…
CAPERS Observations of Two UV-Bright Galaxies at z>10. More Evidence for Bursting Star Formation in the Early Universe
Vasily Kokorev, Ãscar A. Chávez Ortiz, Anthony J. Taylor +38
We present the first results from the CAPERS survey, utilizing PRISM observations with the JWST/NIRSpec MSA in the PRIMER-UDS field. With just 14 % of the total planned data volume…